WO2017154720A1 - Electromagnetic actuator and switch device - Google Patents

Electromagnetic actuator and switch device Download PDF

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Publication number
WO2017154720A1
WO2017154720A1 PCT/JP2017/008236 JP2017008236W WO2017154720A1 WO 2017154720 A1 WO2017154720 A1 WO 2017154720A1 JP 2017008236 W JP2017008236 W JP 2017008236W WO 2017154720 A1 WO2017154720 A1 WO 2017154720A1
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WO
WIPO (PCT)
Prior art keywords
core
electromagnetic actuator
armature
amateur
magnetic
Prior art date
Application number
PCT/JP2017/008236
Other languages
French (fr)
Japanese (ja)
Inventor
雄大 相良
貢 森
和希 高橋
幸本　茂樹
智也 出口
匠 藤原
洋介 仲西
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2017540664A priority Critical patent/JP6381819B2/en
Publication of WO2017154720A1 publication Critical patent/WO2017154720A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements

Definitions

  • the present invention relates to an electromagnetic actuator used for opening and closing operations such as an electromagnetically operated switching device.
  • Patent Document 1 describes an electromagnet device for closing a circuit breaker that opens and closes a vacuum circuit breaker corresponding to a current interrupting unit that conducts and interrupts current via a link mechanism.
  • the electromagnetic device for insertion described in FIG. 7 of Patent Document 1 is arranged around a solenoid coil, an armature of a magnetic material that can reciprocate in the axial direction of the solenoid coil (plunger 3 of Patent Document 1), and a solenoid coil.
  • the core (the yoke 5 of Patent Document 1) serving as a magnetic flux path, the magnetic support plate of the magnetic material that supports the lower surface of the armature, and the magnetic support plate and the lower end portion of the core (the lower end plate 5C of Patent Document 1) are connected.
  • the electromagnetic actuator described in Patent Document 1 causes the armature to move away from the magnetic support plate by causing a current to flow through the solenoid coil when the circuit breaker is turned on.
  • a current is applied by applying a voltage to the solenoid coil
  • the magnetic flux passing through the armature flows mainly through the magnetic support plate and the magnetic column because there are nonmagnetic spacers and air gaps when the current value at the initial energization is small.
  • the amateur is attracted to the magnetic support plate by this magnetic flux.
  • This suction force is a force that works in a direction that cancels the driving force that drives the amateur, and is an initial load force that acts as a load in the early stage of amateur driving.
  • the magnetic support plate is composed of a relatively thin plate, so that magnetic saturation is reached immediately, and the attractive force between the amateur and the magnetic support plate is kept almost constant.
  • the magnetic flux flowing from the amateur through the air gap into the lower end of the core increases as the current value of the solenoid coil increases, so the driving force that lifts the amateur away from the magnetic support plate and pulls it upward is the current. Increases with increasing value.
  • the upward driving force of the amateur exceeds the attractive force between the amateur and the magnetic support plate, the amateur moves away from the magnetic support plate and moves upward, and the shaft (rod) fixed to the upper surface of the amateur Is delivered and the electromagnetic actuator turns on the circuit breaker.
  • the electromagnetic actuator described in Patent Document 1 has an attractive force generated between the armature and the magnetic support plate until the coil current becomes sufficiently large as compared with the case where the magnetic support plate is not provided. I was able to hold an amateur. Therefore, since the electromagnetic actuator described in Patent Document 1 moves the armature after the coil current is sufficiently large, the driving force of the armature can be increased, and the armature can be reliably moved to a predetermined position. It becomes possible.
  • an initial load force acting in a direction to cancel out the driving force of the amateur is applied by an attractive force generated between the amateur and a magnetic support plate disposed below the amateur.
  • the magnetic circuit that generates the initial load force faces the outside of the electromagnetic actuator, when this magnetic circuit is magnetically saturated, leakage magnetic flux is generated outside the electromagnetic actuator.
  • the electromagnetic actuator described in Patent Document 1 is assumed from a peripheral magnetic body via a magnetic support plate when a device including a magnetic body or a jig such as a fastening member of the electromagnetic actuator is disposed around the electromagnetic actuator.
  • the above magnetic flux may flow to the amateur, and the initial load force in the direction opposite to the driving force for driving the amateur increases, so that the amateur cannot be driven.
  • the magnetic circuit that generates the initial load force faces the outside of the electromagnetic actuator.
  • this magnetic circuit is magnetically saturated, a leakage magnetic flux is generated outside the electromagnetic actuator. If a magnetic material is disposed around the peripheral device, it may cause a failure or malfunction of a peripheral device including the magnetic material, and even a peripheral device that does not include magnetism may cause a failure or malfunction due to strong magnetic flux leakage. Cause.
  • the present invention solves the above-described problems, and an object of the present invention is to obtain an electromagnetic actuator that can give a stable initial load force to an amateur when driving the amateur without leaking magnetic flux outside the electromagnetic actuator. .
  • the electromagnetic actuator of the present invention drives a magnetic armature that is movably disposed inside a coil by magnetic flux generated by the coil.
  • the electromagnetic actuator is disposed on the outside of the coil, the root portion, the armature that extends from the root portion in the direction of the coil axis of the coil and has an extending portion having a smaller outer diameter than the root portion, and the coil.
  • a magnetic core that forms a magnetic path through which the magnetic flux generated by the coil passes with the armature, and the armature has a circumferentially extending portion that extends in the circumferential direction perpendicular to the coil axis from the outer periphery of the extending portion.
  • the core is provided opposite to the circumferential extension portion of the amateur, and has a suction portion that generates an attractive force between the core and the circumferential extension portion when the magnetic flux passes, It has the armature opposing part which forms the 2nd magnetic path which opposes an amateur and passes a magnetic flux outside the 1st magnetic path through which a magnetic flux passes an attraction
  • the electromagnetic actuator of the present invention includes a first magnetic path through which a magnetic flux passes through an attraction portion provided inside a core, and a second magnetic path through which the magnetic flux passes while facing the armature outside the first magnetic path. Therefore, a stable initial load force can be applied to the armature when driving the armature without leaking the magnetic flux to the outside of the electromagnetic actuator.
  • FIG. 21 is a partial view of the core and amateur of FIG. 20. It is a figure of the shock absorbing material of FIG. It is a fragmentary figure of the 2nd electromagnetic actuator by Embodiment 7 of this invention. It is a figure of the shock absorbing material of FIG. It is a fragmentary view of the 3rd electromagnetic actuator by Embodiment 7 of this invention.
  • FIG. 1 and 2 are diagrams showing an electromagnetic actuator and a switchgear according to Embodiment 1 of the present invention.
  • FIG. 1 shows a first state of the electromagnetic actuator
  • FIG. 2 shows a second state of the electromagnetic actuator.
  • FIG. 3 is a schematic cross-sectional view of the electromagnetic actuator according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG.
  • the electromagnetic actuator 1 includes a magnetic core 2, a magnetic armature 3 movably provided inside the core 2, a coil 4 that generates a magnetic flux in a magnetic path formed by the core 2 and the armature 3, and A magnetic force generated by the coil 4 passes between the shaft 5 fixed to the amateur 3 and penetrating the core 2 and between the core 2 and the armature 3 to generate an attraction force.
  • suction portions 15 and 16 for applying a load force acting in a direction to cancel the drive force for driving in the direction in which 5 is delivered.
  • the core 2 and the armature 3 form a magnetic path through which the magnetic flux generated by the coil 4 passes.
  • the opening / closing device 50 includes the electromagnetic actuator 1, the link mechanism 24, and the current interrupting unit 21.
  • the shaft 5 is connected to the current interrupting part 21 of the switching device 50 via the link mechanism 24.
  • the current interrupting unit 21 includes a movable contact 22 and a fixed contact 23 inside.
  • the switchgear 50 moves the movable contact 22 of the current interrupting part 21 so as to be connected to the fixed contact 23 via the link mechanism 24, and performs a closing operation to bring the current interrupting part 21 into a closed state.
  • the shaft 5 is disposed so that the central axis passing in the extending direction coincides with the coil axis 4 a passing through the opening center of the coil 4.
  • the load force that works in the direction that cancels the drive force that drives the amateur 3 in the direction in which the shaft 5 is delivered is generated in the early stage of driving of the amateur 3, and is therefore referred to as the initial load force as appropriate.
  • the direction in which the amateur 3 moves to the exposed end 5a of the shaft 5 is also the direction in which the amateur 3 changes from the first state to the second state, so the driving force that drives the amateur 3 in the direction in which the shaft 5 is delivered is This is a driving force for driving the amateur 3 from the first state to the second state.
  • the electromagnetic actuator 1 When the electromagnetic actuator 1 is in the first state shown in FIG. 1, that is, when the exposed end portion 5a of the shaft 5 is approaching the core 2, the movable contact 22 and the fixed contact 23 of the current interrupting portion 21 are separated from each other. ing. When the electromagnetic actuator 1 is in the second state shown in FIG. 2, that is, when the exposed end 5 a of the shaft 5 is away from the core 2, the movable contact 22 and the fixed contact 23 of the current interrupter 21 are mutually connected. In contact. 1 and 2, the electromagnetic actuator 1 shows a configuration example in which an opening / closing operation for opening or closing the current interrupting portion 21 of the opening / closing device 50 is performed.
  • FIGS. 1 and 4 cross-sectional views of the electromagnetic actuator 1 and the current interrupting unit 21 are shown, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like.
  • 3 and 4 also show cross-sectional views of the electromagnetic actuator 1, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like.
  • the outer peripheral line (the outer peripheral line in the direction perpendicular to the moving direction of the shaft 5) that is originally visible from the cross section of the left and right coils 4 on the back side of the drawing surface is not easily visible. Omitted.
  • hatching is omitted in the cross section, and an outer peripheral line in a direction perpendicular to the moving direction of the shaft 5 in the coil 4 is omitted.
  • the core 2 includes a core body portion 7 that surrounds the outer peripheral surface of the coil 4, a core lid portion 8 that covers the upper side of the coil 4 (side on which the shaft 5 is disposed), and a lower side (core lid portion 8) of the core body portion 7. And the core opening end portion 9 which extends in the direction of the shaft 5 from the side where the armature 3 is not disposed and forms an opening 14 where the armature extending portion 12 of the armature 3 is exposed to the outside.
  • the core opening end portion 9 forms an opening 14 through which the amateur extending portion 12 of the amateur 3 can be inserted.
  • the core lid portion 8 faces the core opening end portion 9 at a position away from the core opening end portion 9 in the direction of the coil shaft 4a.
  • the core body portion 7 connects the core lid portion 8 and the core opening end portion 9.
  • the amateur 3 includes an amateur root portion 11 to which the shaft 5 is connected, and an amateur extending portion 12 provided so as to extend from the amateur root portion 11 to the opening 14 side of the core 2 and having an outer diameter smaller than that of the amateur root portion 11.
  • a through hole is formed in the core lid portion 8 of the core 2, and the shaft 5 moves through the through hole in the vertical direction in the figure (the vertical direction of the coil shaft 4 a).
  • the through hole of the core lid part 8 is formed so that the central axis thereof coincides with the coil axis 4a. Further, the central axis of the shaft 5 coincides with the central axis of the amateur 3.
  • the armature 3 is disposed inside the coil 4 and the core 2 so that the central axis of the shaft 5 and the armature 3 coincides with the coil axis 4 a.
  • Each of the shaft 5, the amateur root portion 11, and the amateur extending portion 12 has a cylindrical shape, for example.
  • the coil 4 has, for example, a cylindrical shape with an opening
  • the outer shape of the core 2 has, for example, a cylindrical shape in which a through hole is formed in the upper part and an opening 14 is formed in the lower part.
  • the outer peripheral surface 11 a of the amateur root portion 11 faces the inner peripheral surface of the coil 4, and the outer peripheral surface 12 a of the amateur extension portion 12 faces the inner peripheral surface 9 a of the core opening end 9 in the core 2.
  • the inner peripheral surface 9a is an amateur facing portion that forms a magnetic path M2 that faces the outer peripheral surface 12a of the armature 3 and through which the magnetic flux generated by the coil 4 passes.
  • the outer diameter of the amateur extending portion 12 is smaller than the outer diameter of the amateur root portion 11.
  • a circumferentially extending portion 11b extending in the circumferential direction from the outer periphery of the amateur extending portion 12 is formed.
  • a portion of the circumferentially extending portion 11 b in the amateur root portion 11 faces a portion of the inner side surface 9 b of the core opening end portion 9 in the core 2.
  • the portions where the circumferentially extending portion 11 b and the inner side surface 9 b of the core opening end portion 9 face each other are suction portions 15 and 16. That is, the suction portion 15 of the core opening end portion 9 in the core 2 and the suction portion 16 of the circumferential extension portion 11b in the armature 3 face each other.
  • the suction portion 15 of the core 2 has an end on the coil shaft 4 a side (inner peripheral side) that is the inner peripheral surface 9 a of the core opening end portion 9, and an outer peripheral end that extends from the outer peripheral surface 11 a of the amateur root portion 11 in the armature 3. This is a position through which a broken line 31 extending parallel to the coil axis 4a passes.
  • the suction part 16 of the amateur 3 has an outer peripheral end that is the outer peripheral face 11 a of the amateur base 11, and an end on the coil shaft 4 a side (inner peripheral side) that extends from the inner peripheral face 9 a of the core opening end 9 in the core 2. This is a position through which a broken line 30 extending parallel to the coil axis 4a passes. In FIG.
  • the gap between the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2 is a magnetic gap G1
  • the outer peripheral surface 12a of the armature extending portion 12 in the armature 3 and the core opening end portion in the core 2 9 shows an example in which the gap between the inner surface 9a and the inner peripheral surface 9 is a magnetic gap G2.
  • the magnetic gap G1 is smaller than the magnetic gap G2.
  • 1 and 2 show an example in which the magnetic gap G2 in the electromagnetic actuator 1 does not change between the first state and the second state, and the magnetic gap G1 in the first state changes to the magnetic gap G3 in the second state. It was.
  • the link mechanism 24 may be provided with a return spring for returning the electromagnetic actuator 1 from the second state shown in FIG. 2 to the first state shown in FIG.
  • iron, cobalt, nickel etc. can be used as a magnetic material of the core 2 and the armature 3, and you may comprise as a laminated
  • the operation of the electromagnetic actuator 1 will be described, in which the movable contact 22 and the fixed contact 23 of the current interrupting part 21 change from the open state where they are separated from each other to the closed state where the movable contact 22 and the fixed contact 23 are in contact with each other.
  • a current flows to the coil 4 of the electromagnetic actuator 1 in the first state shown in FIG. 1 toward the exposed end 5a of the shaft 5 a magnetic flux directed toward the exposed end 5a of the shaft 5 is generated inside the coil 4.
  • the current flowing through the coil 4 is referred to as a coil current.
  • the amateur 3 is driven by the magnetic flux so that the exposed end 5a of the shaft 5 is separated from the core 2.
  • the magnetic flux generated by the coil 4 passes around the coil 4.
  • the magnetic path M1 is a magnetic path formed on the side close to the coil 4, and the magnetic path M2 is a magnetic path formed outside the magnetic path M1.
  • the magnetic resistance of the magnetic path M 1 becomes smaller than the magnetic resistance of the magnetic path M 2, and the coil current flows through the coil 4.
  • the magnetic flux concentrates and passes through the magnetic path M1 having a small magnetic resistance. Since the current value is small at the initial stage of energization when current begins to flow through the coil 4, the magnetic flux mainly passes through the magnetic path M1.
  • the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2 are magnetized in the same direction along the direction of the magnetic flux, so the attracting portion 16 of the amateur 3 and the core 2 Are attracted to each other, and a suction force is generated between the suction portion 16 and the suction portion 15.
  • the direction of the suction force by which the movable armature 3 is attracted to the core 2 is opposite to the direction in which the armature 3 is driven in the direction of the shaft 5. That is, a load force opposite to the driving force that drives the armature 3 in the direction of the shaft 5 is applied to the armature 3.
  • the direction of the driving force by which the amateur 3 is driven in the direction of the shaft 5 is the direction from the amateur extending portion 12 of the amateur 3 to the exposed end portion 5a of the shaft 5, and is upward in FIGS.
  • the direction of the load force applied to the amateur 3 is the direction from the suction part 16 of the amateur 3 to the suction part 15 of the core 2 and is downward in FIGS. 1 to 4.
  • the suction portions 15 and 16 for applying a load force acting in a direction to cancel the driving force for driving the armature 3 in the direction in which the shaft 5 is sent between the core 2 and the armature 3 are provided.
  • the magnetic support plate corresponding to the attracting portion 15 is disposed outside the core because it is formed inside the core 2
  • the magnetic flux generated by the coil current is a magnetic path.
  • the inside of the electromagnetic actuator 1 is reliably closed by M1 and the magnetic path M2.
  • the electromagnetic actuator 1 according to the first embodiment is configured such that the magnetic flux passing through the core 2 and the armature 3, that is, the magnetic flux passing through the magnetic paths M1 and M2, does not depend on the presence or absence of the surrounding magnetic body. Therefore, magnetic flux does not act. Therefore, the electromagnetic actuator 1 of the first embodiment is free from fluctuations in load force caused by leakage of magnetic flux generated by the coil current to the outside of the electromagnetic actuator 1, that is, the load force is constant and the armature 3 is reliably set to a predetermined value. It is possible to move to the position.
  • the electromagnetic actuator 1 can maintain a constant load force acting in a direction to cancel the driving force for driving the armature 3 in the direction in which the shaft 5 is delivered, and a large current after the coil current of the coil 4 has sufficiently increased.
  • the amateur 3 can be driven, so that the operating characteristics of the amateur 3 are stabilized and the peripheral device is not damaged or malfunctioned.
  • the suction portions 15 and 16 are not formed as separate parts but are formed as a part of the core 2 and the armature 3, so that integration errors such as assembly errors and dimensional errors are reduced. Therefore, the magnetic gap G1 of the attracting portions 15 and 16 and the area where the load force (attraction force) is generated are stable, and the operation variation of the electromagnetic actuator can be reduced. Further, since the electromagnetic actuator 1 according to the first embodiment does not require a separate part, the cost can be reduced and the size can be reduced by reducing the number of parts.
  • the electromagnetic actuator 1 of Embodiment 1 adjusts the suction part width A1 of the suction part 16 of the armature 3 and the suction part width A2 of the suction part 15 of the core 2 shown in FIG. ) Can be easily changed, so that the load force can be freely adjusted without increasing the outer shape of the electromagnetic actuator 1.
  • the suction part width A1 and the suction part width A2 for example, the outer diameter of the armature extension part 12 and the diameter of the opening 14 of the core opening end part 9 are increased, or the outer diameter of the amateur root part 11 is reduced. Good.
  • suction part width A1 and the suction part width A2 are increased, for example, the outer diameter of the armature extension part 12 and the diameter of the opening 14 of the core opening end part 9 are reduced, or the outer diameter of the amateur root part 11 is increased. do it.
  • the magnetic gap G1 is smaller than the magnetic gap G2. Therefore, as described above, the magnetic resistance of the magnetic path M1 is smaller than the magnetic resistance of the magnetic path M2, and the coil 4 is coiled.
  • the magnetic flux concentrates and passes through the magnetic path M1 having a small magnetic resistance.
  • the magnetization of the armature 3 and the core 2 proceeds in the magnetic path M1 and the magnetic resistance of the magnetic path M1 increases, the magnetic flux passes from the magnetic path M1 to the magnetic path M2. Even when a deviation such as dimensional tolerance or installation error occurs in one or both of the amateur 3 and the core 2, it is possible to reliably pass the magnetic flux preferentially over the magnetic path M1 where the small magnetic gap G1 exists.
  • the initial load force in the direction opposite to the driving direction in which the shaft 3 is driven in the direction in which the shaft 5 is delivered can be stabilized, and the operation variation of the amateur 3 can be reduced. Furthermore, the electromagnetic actuator 1 according to the first embodiment can change the magnetic resistance of the magnetic path M1 and the magnetic path M2 even by adjusting the magnetic gap G1 and the magnetic gap G2, so that the outer shape of the electromagnetic actuator 1 is not increased. The initial load force can be adjusted freely.
  • the electromagnetic actuator 1 forms at least one magnetic path, that is, one magnetic path M2 outside the magnetic path M1 passing through the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2. Therefore, it is possible to stabilize the initial load force in the opposite direction to the driving force that the armature 3 is driven in the direction of the shaft 5 regardless of the presence or absence of the surrounding magnetic material, and it is possible to cause failure or malfunction of the peripheral device. In addition to being able to prevent this, the cost can be reduced and the size can be reduced by reducing the number of parts.
  • the electromagnetic actuator 1 has shown the example in which the suction part 15 of the core 2 and the suction part 16 of the amateur 3 are not in contact in the first state, the suction part 15 of the core 2 and the suction of the amateur 3 are shown. The same effect can be obtained also when the part 16 is in contact.
  • the magnetic gap of the magnetic path M2 has been described as an example, it is not essential that the magnetic gap of the magnetic path M2 is constant. For example, the magnetic gap of the magnetic path M2 may be reduced as the amateur 3 moves.
  • the electromagnetic actuator 1 according to the first embodiment is an electromagnetic actuator that drives the magnetic armature 3 movably disposed inside the coil 4 by the magnetic flux generated by the coil 4.
  • the electromagnetic actuator 1 according to the first embodiment is provided with a coil 4, a root part (amateur root part 11), a base part (amateur root part 11) extending from the root part (amateur root part 11) in the direction of the coil shaft 4 a and a root part.
  • a magnetic core 2 that forms a path.
  • the armature 3 of the electromagnetic actuator 1 includes a circumferentially extending portion 11b that extends in the circumferential direction perpendicular to the coil shaft 4a from the outer periphery of the extending portion (the amateur extending portion 12).
  • the suction portion 15 is provided on the inner side of the core 3 so as to generate an attractive force between the circumferential extension portion 11b and the circumferential extension portion 11b when the magnetic flux passes.
  • 15 has an armature facing portion (inner peripheral surface 9a) that forms a second magnetic path M2 that faces the armature 3 and passes the magnetic flux outside the first magnetic path M1 through which the flux passes. To do.
  • the electromagnetic actuator 1 includes a first magnetic path M1 through which a magnetic flux passes through an attractive portion 15 provided inside the core 2, and an armature 3 that faces the armature 3 outside the first magnetic path M1.
  • the second magnetic path M2 through which the armature passes is formed, so that a stable initial load force can be applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the switching device 50 is configured to connect the current interrupting unit 21 having the movable contact 22 and the fixed contact 23 therein, and the movable contact 22 of the current interrupting unit 21 to the fixed contact 23 via the link mechanism 24.
  • the electromagnetic actuator 1 to be moved is provided.
  • the electromagnetic actuator 1 is provided to extend from the coil 4, the root portion (amateur root portion 11), the root portion (amateur root portion 11) to the coil axis 4 a of the coil 4, and the root portion (amateur root portion 11).
  • the armature 3 having a stretched portion (amateur stretched portion 12) having a smaller outer diameter than the armature 3) and a magnetism that forms a magnetic path through which the magnetic flux generated by the coil 4 passes with the armature 3.
  • a core 2 of the body is configured to connect the current interrupting unit 21 having the movable contact 22 and the fixed contact 23 therein, and the movable contact 22 of the current interrupting unit 21 to the fixed contact 23 via the link mechanism 24.
  • the electromagnetic actuator 1 to be moved is provided
  • the armature 3 of the electromagnetic actuator 1 has a circumferentially extending portion 11b that extends in the circumferential direction perpendicular to the coil shaft 4a from the outer periphery of the extending portion (the amateur extending portion 12), and the core 3 is a circumferentially extending portion of the amateur 3
  • the suction portion 15 is provided on the inner side of the core 3 so as to generate a suction force with respect to the circumferential extension portion 11b when the magnetic flux passes and the magnetic flux passes through the suction portion 15.
  • the armature facing part (inner peripheral surface 9a) which forms the 2nd magnetic path M2 which opposes the armature 3 and the magnetic flux passes outside of the 1st magnetic path M1 to perform is characterized by the above-mentioned.
  • the opening / closing device 50 includes a first magnetic path M1 through which the magnetic flux passes through the attracting portion 15 provided inside the core 2, and the magnetic flux that faces the armature 3 outside the first magnetic path M1. Since the electromagnetic actuator 1 that forms the second magnetic path M2 through which the armature passes is provided, a stable initial load force is applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1. Thus, the closing operation for closing the current interrupting portion 21 can be reliably performed.
  • FIG. FIG. 5 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG.
  • FIG. 7 is a schematic cross-sectional view of another electromagnetic actuator according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic cross-sectional view showing a main part of the electromagnetic actuator of FIG.
  • FIG. 9 is a diagram illustrating an example of the applying force of the electromagnetic actuator according to the second embodiment of the present invention. 5 to 8 show the configuration of the electromagnetic actuator 1 in the first state.
  • FIG. 5 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG.
  • FIG. 7 is a schematic cross-sectional view of another electromagnetic actuator according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic cross-sectional view showing
  • the electromagnetic actuator 1 compares the applying force of the electromagnetic actuator 1 of the first embodiment and the applying force of the electromagnetic actuator 1 of the first embodiment when the initial load force is the same.
  • the electromagnetic actuator 1 according to the second embodiment at least one of the core 2 or the armature 3 is formed in a protruding shape in the attracting portions 15 and 16, and the magnetic flux passing area S1 through which the magnetic flux passes through the attracting portions 15 and 16 is defined as the magnetic path M1.
  • the magnetic path M2 provided outside is smaller than the magnetic flux passage area S2 through which the magnetic flux passes between the core 2 and the armature 3.
  • the electromagnetic actuator 1 shown in FIG. 5 and FIG. 6 is an example in which a protrusion 9 c that protrudes toward the suction portion 16 is provided on the inner side surface 9 b of the core opening end 9.
  • the electromagnetic actuator 1 shown in FIGS. 7 and 8 is an example in which a protrusion 11 c that protrudes toward the suction portion 15 is provided on the circumferential extension portion 11 b of the amateur base portion 11.
  • the magnitude of the initial load force in the direction opposite to the driving direction in which the amateur 3 is driven in the direction of the shaft 5 is the product of the square of the magnetic flux density B of the suction portions 15 and 16 and the magnetic flux passage area S of the suction portions 15 and 16. It is proportional to B 2 S.
  • B 2 S the absolute value of the magnitude of the initial load force may be made equal, so the characteristics of the applied force applied to the amateur 3 in FIG.
  • FIG. 9 the vertical axis represents the coil current or the applied force applied to the amateur 3, and the horizontal axis represents time.
  • a characteristic 32 is a coil current characteristic.
  • Characteristics 33 and 34 are the imparting force characteristic in the first embodiment and the imparting force characteristic in the second embodiment, respectively.
  • the maximum value of the initial load force is when the magnetic flux flows only in the magnetic flux M1. If the coil currents flowing in the coil 4 are the same, the intensity of the magnetic flux generated by the coil 4 is also the same. Therefore, when the suction part width A4 of the second embodiment is smaller than the suction part width A2 of the first embodiment, The magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16, is reduced, and the magnetic flux density B passing through the attracting portions 15 and 16 is increased.
  • the magnetic flux M1 that is, the magnetic flux passage area S1 that passes through the attracting portions 15 and 16 is decreased and the magnetic flux density B is increased, so that the coil current is the same as in the first embodiment.
  • An initial load force equivalent to that of the electromagnetic actuator 1 is generated.
  • the rate of decrease of the magnetic flux density B accompanying the increase in the magnetic gap of the attracting portions 15 and 16 after the movement of the armature 3 is lower than that of the electromagnetic actuator 1 of the first embodiment. growing. Therefore, compared with the first embodiment, the electromagnetic actuator 1 according to the second embodiment has a larger reduction rate of the product B 2 S in the initial load force, and the applied force applied to the amateur 3 as shown in FIG.
  • the increase rate of the driving force which is a positive force, can be increased, and the driving characteristics can be improved. It should be noted that the applied force when the applied force applied to the amateur 3 is negative is a load force opposite to the driving force.
  • the attracting portion widths A3 and A4 may be reduced. It is not necessary to provide the protruding portion 9c protruding to the suction portion 16 side on the inner side surface 9b of 9 or the protruding portion 11c protruding to the suction portion 15 side on the circumferential extension portion 11b of the amateur root portion 11. . However, by providing the protrusion 9c and the protrusion 11c, the magnetic flux M1 passes through the magnetic path M1, that is, the magnetic flux passage area S1 through which the magnetic flux M passes through the magnetic path M2. Can be easily done.
  • the magnetic flux passing through the magnetic path M2 is reduced by reducing the magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16, to the magnetic flux passing area S2 through which the magnetic flux passes through the magnetic path M2.
  • the applied force characteristic 34 in FIG. 9 increases, the increase rate of the driving force can be increased and the driving characteristic can be improved.
  • the magnetic flux passage area S ⁇ b> 2 that passes through the magnetic path M ⁇ b> 2 is equal to the inner peripheral surface width B ⁇ b> 1 that is the width of the inner peripheral surface 9 a of the core opening end portion 9. It is the product of the peripheral length of the peripheral surface 9a.
  • the suction part width A4 which is the circumferential width of the suction part 15 of the core opening end 9
  • the magnetic path M1 is changed.
  • the passing magnetic flux passage area S1 is the same as that of the electromagnetic actuator 1 of the first embodiment.
  • the magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1 that is, the suction portions 15, 16 is provided.
  • the magnetic flux passage area S2 passing through the magnetic path M2 is equal to the end inner peripheral surface width B1 which is the width of the inner peripheral surface 9a of the core opening end portion 9. It is the product of the peripheral length of the peripheral surface 9a.
  • the magnetic flux passage area S2 passing through the magnetic path M2 is the same as the electromagnetic actuator 1 of the first embodiment in the electromagnetic actuator 1 of the second embodiment when the end inner peripheral surface width B1 is the same.
  • the suction portion width A3 which is the width in the circumferential direction of the suction portion 16 of the circumferential extension portion 11b in the amateur root portion 11, is provided with the projection portion 11c, so that the armature root portion 11 having the same diameter is provided.
  • the magnetic flux passage area S1 passing through the magnetic path M1 is smaller in the electromagnetic actuator 1 of the second embodiment than in the electromagnetic actuator 1 of the first embodiment.
  • the magnetic flux passage area through which the magnetic flux passes through the magnetic path M1 that is, the attracting portions 15 and 16 is provided.
  • S1 can be made smaller than the magnetic flux passage area S2 where the magnetic flux passes through the magnetic path M2.
  • the same effect as in the first embodiment can be obtained.
  • a stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the electromagnetic actuator 1 of Embodiment 2 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts.
  • the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap.
  • the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
  • FIG. FIG. 10 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 3 of the present invention
  • FIG. 11 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG. 10 and 11 show the configuration of the electromagnetic actuator 1 in the first state.
  • the armature 3 or the projections of the core 2 are integrated with a tolerance L1 so that the suction part widths A1 and A2 of the suction parts 15 and 16 are constant.
  • the above is an example of moving the outer side in the circumferential direction.
  • the electromagnetic actuator 1 according to the third embodiment can keep the suction section widths A1 and A2 constant even if the armature 3 is displaced in the horizontal direction in FIGS. 10 and 11 due to installation errors and dimensional tolerances. Therefore, it becomes possible to keep constant the initial load force in the direction opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and the operation variation of the armature 3 can be reduced.
  • the electromagnetic actuator 1 shown in FIG. 10 and FIG. 11 is an example in which a protrusion 11c that protrudes toward the suction portion 15 is provided on the circumferential extension 11b of the amateur base 11.
  • a protrusion 11c that protrudes toward the suction portion 15 is provided on the circumferential extension 11b of the amateur base 11.
  • the same effect as in the first embodiment can be obtained.
  • a stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the electromagnetic actuator 1 of Embodiment 3 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts.
  • the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap.
  • the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
  • FIG. FIG. 12 is a schematic sectional view of an electromagnetic actuator according to Embodiment 4 of the present invention
  • FIG. 13 is a schematic sectional view of another electromagnetic actuator according to Embodiment 4 of the present invention. 12 and 13 show the configuration of the electromagnetic actuator 1 in the first state.
  • the electromagnetic actuator 1 according to the fourth embodiment is an example in which a nonmagnetic material 6 a is disposed between the suction part 15 and the suction part 16. The nonmagnetic material 6 a is fixed to the suction part 15 or the suction part 16.
  • the nonmagnetic material 6 a is disposed between the circumferentially extending portion 11 b of the armature 3 and the inner side surface 9 b of the core opening end portion 9 in the core 2.
  • the electromagnetic actuator 1 of FIGS. 12 and 13 has a nonmagnetic material 6a inserted between the circumferentially extending portion 11b of the armature 3 and the inner surface 9b of the core opening end portion 9 of the core 2. It becomes possible to keep the magnetic gap between the circumferentially expanded portion 11b of the amateur 3 and the inner side surface 9b of the core opening end 9 in the core 2, that is, the magnetic gap between the attracting portion 15 and the attracting portion 16. Can be kept constant.
  • a magnetic gap different from the magnetic gap between the attracting portion 15 and the attracting portion 16 that is, the inner peripheral surface 9 a of the core opening end 9 in the core 2 and the outer peripheral surface of the amateur extending portion 12 in the amateur 3.
  • the same effect as in the first embodiment can be obtained.
  • a stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the electromagnetic actuator 1 of Embodiment 4 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts.
  • the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap.
  • the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
  • FIG. FIG. 14 is a schematic sectional view of an electromagnetic actuator according to Embodiment 5 of the present invention
  • FIG. 15 is a schematic sectional view of another electromagnetic actuator according to Embodiment 5 of the present invention. 14 and 15 show the configuration of the electromagnetic actuator 1 in the first state.
  • the electromagnetic actuator 1 according to the fifth embodiment is an example in which opposing surfaces of the suction portions 15 and 16 facing each other are arranged at an angle with respect to the driving direction of the armature 3, that is, the coil shaft 4a. Opposing surfaces of the suction portions 15 and 16 facing each other are inclined with respect to the coil shaft 4a.
  • FIG. 14 and 15 show an example in which the opposing surfaces of the suction portions 15 and 16 facing each other are inclined at the same angle with respect to the coil shaft 4a.
  • FIG. 14 shows an example in which the opposing surfaces of the suction portions 15 and 16 are inclined so as to advance toward the shaft 5 as they approach the coil shaft 4a.
  • FIG. 15 shows an example in which the opposing surfaces of the suction portions 15 and 16 are inclined so as to advance toward the opposite side of the shaft 5, that is, toward the armature extension portion 12 side and the opening 14 side as approaching the coil shaft 4 a.
  • the armature 3 repeatedly collides and repels between the suction portion 16 provided on the armature 3 and the suction portion 15 of the core 2, and stops in the first state shown in FIG. Thereby, a large impact is applied several times to the suction part 16 of the amateur 3 and the suction part 15 of the core 2, causing deformation of the suction parts 15 and 16.
  • the suction portions 15 and 16 are arranged at an angle with respect to a plane (horizontal plane) perpendicular to the coil axis 4a, and thus are generated in the suction portions 15 and 16 when returning to the first state.
  • the direction in which the impact is applied can be dispersed in directions other than the direction of the coil shaft 4a, that is, in the direction parallel to the opposing surfaces of the suction portions 15 and 16, and the number of collisions and repulsions can be reduced. The number of times the impact is applied is reduced, and the period (deformation life) until the deformation of the suction portions 15 and 16 exceeds the allowable range can be extended.
  • the electromagnetic actuator 1 according to the fifth embodiment can extend the deformation life of the suction portions 15 and 16, the variation of the initial load force in the direction opposite to the driving direction due to the deformation of the suction portions 15 and 16 is suppressed. It is possible to reduce the operational variation of the amateur 3, and to prolong the product life.
  • the armature 3 When the coil 4 is not energized and the coil 4 is not energized, the armature 3 has a load force opposite to the driving direction in which the armature 3 is driven in the direction of the shaft 5 due to the weight of the armature 3 (or the resultant force with the return spring).
  • the suction part 15 and the suction part 16 come into contact with each other.
  • the suction portions 15 and 16 are arranged at an angle with respect to the horizontal plane.
  • the electromagnetic actuator 1 is arranged so that the central axis of the armature 3 and the coil axis 4a coincide with each other through the through-hole of the core 2.
  • the electromagnetic actuator 1 can prevent the center axis of the armature 3 from being displaced in the circumferential direction (left and right direction on the paper surface) from the coil shaft 4a even when the coil is not energized.
  • the distortion of the hole can be prevented, the variation in the initial load force opposite to the driving direction in which the armature 3 is driven in the direction of the shaft 5 can be reduced, and the operation variation of the armature 3 can be reduced.
  • the same effect as in the first embodiment can be obtained.
  • a stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1.
  • at least one or more magnetic paths M2 are formed outside the magnetic path M1 that passes through the attracting portions 15 and 16, and therefore, regardless of the presence or absence of the surrounding magnetic material. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts.
  • the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap.
  • the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
  • FIG. FIG. 16 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 6 of the present invention
  • FIG. 17 is a diagram showing an example of coil current of the electromagnetic actuator according to Embodiment 6 of the present invention.
  • FIG. 16 shows the configuration of the electromagnetic actuator 1 in the first state.
  • the coil current of the electromagnetic actuator 1 in Embodiment 1 is also shown for comparison.
  • the electromagnetic actuator 1 according to the sixth embodiment is an example in which opposing surfaces of the suction portions 15 and 16 facing each other are provided on the coil driving direction side, that is, on the shaft 5 side.
  • the core 2 according to the sixth embodiment includes a core extension portion 10 provided to extend toward the coil shaft 4 a side on the core lid portion 8 side of the core body portion 7.
  • a part of the circumferentially extending portion 11 b in the amateur root portion 11 faces a portion of the shaft direction surface 10 a that is a surface on the shaft 5 side in the core extension portion 10 of the core 2.
  • the portions where the circumferentially extending portion 11 b and the shaft direction surface 10 a of the core extending portion 10 face each other are suction portions 15 and 16. That is, the suction part 15 of the core extension part 10 in the core 2 and the suction part 16 of the circumferential extension part 11b in the armature 3 face each other.
  • the inner side surface 8a of the core lid portion 8 is an amateur facing portion that forms a magnetic path M2 that faces the armature 3 and through which the magnetic flux generated by the coil 4 passes.
  • the suction portion 15 of the core 2 has a coil shaft 4 a side (inner peripheral side) end that is the inner peripheral surface 10 b of the core extension 10, and an outer peripheral end that is coiled from the outer peripheral surface 11 a of the amateur root portion 11 in the armature 3. This is a position through which a broken line 31 extending parallel to the axis 4a passes.
  • the suction portion 16 of the amateur 3 has an outer peripheral end that is the outer peripheral surface 11a of the amateur base 11, and a coil shaft 4a side (inner peripheral side) end that is coiled from the inner peripheral surface 10b of the core extension 10 in the core 2. This is a position through which a broken line 30 extending parallel to the axis 4a passes.
  • the gap between the attraction portion 16 of the armature 3 and the attraction portion 15 of the core 2 is a magnetic gap G1
  • the outer peripheral surface 12a of the armature extension portion 12 in the armature 3 and the core opening end portion 9 in the core 2 is the magnetic gap G2
  • the gap between the shaft direction surface 11d which is the surface on the shaft 5 side of the armature root portion 11 of the armature 3 and the inner surface 8a of the core lid portion 8 in the core 2 is the magnetic gap.
  • G4 is shown.
  • the magnetic gap G1 is smaller than the magnetic gap G2 and the magnetic gap G4.
  • the magnetic gap G2 in the electromagnetic actuator 1 does not change between the first state and the second state
  • the magnetic gap G1 in the first state increases in the second state
  • An example of decrease in two states is shown.
  • the magnetic flux generated by the coil 4 passes around the coil 4.
  • the magnetic path M3 is a magnetic path formed on the side close to the coil 4, and the magnetic path M2 is a magnetic path formed outside the magnetic path M3.
  • the magnetic flux generated by the coil 4 passes through a magnetic path M3 that passes through the attracting portions 15 and 16 provided on the driving direction side and a magnetic path M2 that does not pass through the attracting portions 15 and 16.
  • the value of the coil current supplied to the coil 4 is increased. There is a need.
  • the vertical axis in FIG. 17 is the coil current, and the horizontal axis is the stroke that is the length that the armature 3 moves.
  • a characteristic 37 is a coil current characteristic in the electromagnetic actuator 1 of the sixth embodiment, and a characteristic 36 is a coil current characteristic in the electromagnetic actuator 1 of the first embodiment.
  • P1 is a stroke corresponding to the initial position of the amateur 3 in the first state
  • P2 is a stroke corresponding to the position of the amateur 3 in the second state.
  • the magnetic gap G1 is smaller than the magnetic gap G4
  • the magnetic resistance of the magnetic path M3 is smaller than the magnetic resistance of the magnetic path M2, and when a coil current flows through the coil 4, the magnetic flux passes through the magnetic path M3 having a small magnetic resistance. You will pass in a concentrated manner. Since the current value is small at the initial stage of energization when current begins to flow through the coil 4, the magnetic flux mainly passes through the magnetic path M3. Since the magnetic flux M passes through the magnetic path M3, the attracting portion 16 of the amateur 3 and the attracting portion 15 of the core 2 are both magnetized in the same direction along the direction of the magnetic flux. Are attracted to each other, and a suction force is generated between the suction portion 16 and the suction portion 15.
  • the direction of the suction force by which the movable armature 3 is attracted to the core 2 is opposite to the direction in which the armature 3 is driven in the direction of the shaft 5. That is, a load force opposite to the driving force that drives the armature 3 in the direction of the shaft 5 is applied to the armature 3.
  • the direction of the driving force by which the amateur 3 is driven in the direction of the shaft 5 is the direction from the amateur extending portion 12 of the amateur 3 to the exposed end portion 5a of the shaft 5, and is upward in FIG.
  • the direction of the load force applied to the amateur 3 is the direction from the suction part 16 of the amateur 3 to the suction part 15 of the core 2, and is downward in FIG.
  • the driving force for driving the armature 3 in the direction of the shaft 5 and the load force opposite to this driving force also increase.
  • the suction part width of the suction parts 16 and 15 is smaller than the outer diameter of the armature extension part 12, when the suction parts 15 and 16 are magnetically saturated, the suction force is saturated, and the magnitude of the driving force is the magnitude of the suction force.
  • the armature 3 moves upward in the direction in which the suction part 16 moves away from the suction part 15 of the core 2.
  • the link mechanism 24 has a return spring
  • the armature 3 when the magnitude of the driving force exceeds the magnitude of the resultant force of the suction force and the attractive force of the return spring, the armature 3 has the suction portion 16 as the suction portion 15 of the core 2. Move away from, upward in the figure.
  • the electromagnetic actuator 1 of the sixth embodiment has magnetic attraction portions 15 and 16 that apply a load force by concentrating magnetic flux on the magnetic path M3 formed near the coil 4. Even if it is saturated, the magnetic flux passes through the magnetic path M2, and the driving force is continuously applied to the amateur 3. Therefore, similarly to the electromagnetic actuator 1 of the first embodiment, the electromagnetic actuator 1 of the sixth embodiment can operate the armature 3 from the first state to the second state after the coil current of the coil 4 has sufficiently increased. Thus, the armature 3 can be driven with a large current, that is, the driving force of the armature 3 can be increased and the driving characteristics can be improved.
  • the magnetic gap G1 between the suction portion 16 and the suction portion 15 is made smaller than the magnetic gap between the suction portion 16 and the suction portion 15 in the first embodiment.
  • magnetic resistance of the magnetic path M3 is smaller than that of the magnetic path M1 in the first embodiment, and the magnetic flux passes through the armature 3, that is, the armature extending portion 12 and the armature root portion 11, as compared with the electromagnetic actuator 1 of the first embodiment. Will increase. Since the reverse voltage of the coil 4 with respect to the power supply voltage is proportional to the time change of the magnetic flux passing through the armature 3, the armature 3 is more magnetized at the initial position (first state position) as shown in FIG.
  • the electromagnetic actuator 1 of the sixth embodiment can increase the driving force for driving the armature 3 in the direction in which the shaft 5 is sent out by reducing the magnetic gap G1 between the attraction unit 16 and the attraction unit 15.
  • the driving characteristics of the amateur 3 can be improved.
  • the driving characteristics of the amateur 3 can be improved.
  • the same effect as in the first embodiment is obtained.
  • a stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the magnetic gap G1 smaller than the magnetic gap G2 and the magnetic gap G4, as described with reference to FIG. 4 of the first embodiment, it is possible to reduce variation in operation due to dimensional tolerances and installation errors and to reduce the magnetic gap G1.
  • the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
  • the electromagnetic actuator 1 has shown the example in which the suction part 15 of the core 2 and the suction part 16 of the amateur 3 are not in contact in the first state, the suction part 15 of the core 2 and the suction of the amateur 3 are shown. The same effect can be obtained also when the part 16 is in contact.
  • the magnetic gap of the magnetic path M2 has been described as an example, it is not essential that the magnetic gap of the magnetic path M2 is constant. For example, the magnetic gap of the magnetic path M2 may be reduced as the amateur 3 moves.
  • FIG. 18 and 19 are diagrams showing an electromagnetic actuator and a switching device according to the seventh embodiment.
  • FIG. 18 shows a first state and an open state (OFF state) of the electromagnetic actuator
  • FIG. 19 shows a second state and a closed state (ON state) of the electromagnetic actuator.
  • FIG. 20 is a partial view of the first electromagnetic actuator according to the seventh embodiment of the present invention.
  • FIG. 21 is a partial view of the core and amateur of FIG. 20, and
  • FIG. 22 is a view of the cushioning material of FIG.
  • FIG. 20 is a view showing a part of the core 2 and the amateur 3 in the middle of the opening.
  • the suction portion 16 of the circumferential extension portion 11b in the armature 3 and the suction portion 15 of the core 2 are connected to the suction portion 15 of the core 2 to which the opening impact is applied.
  • a cushioning material 41 shown in FIG. 22 is disposed so as to be interposed therebetween, and an opening impact is applied to the cushioning material.
  • the opening impact is caused when the armature 3 and the core 2 collide when the electromagnetic actuator 1 returns from the second state (see FIG. 19) to the first state (see FIG. 18). It is an impact caused by. 20 and 21, a recess for arranging the buffer material 41 is formed in the suction portion 15 of the core 2.
  • the portion on the coil shaft 4 a side of the cushioning material 41 is between the suction portion 16 of the amateur 3 and the suction portion 15 of the core 2. It is a part of the buffer material 41 arrange
  • the switchgear is generally switched from a closed state (ON state) to an open state (OFF state) using a stored energy such as an open spring.
  • a stored energy such as an open spring.
  • the opening impact is applied to the suction portion 15 of the core 2 and the suction portion 16 of the armature 3 which give the initial load force in the opposite direction.
  • the part 15 may be plastically deformed.
  • 20 and 21 exemplify the case where the core 2 and the armature 3 are prisms, the same applies to the case of a cylinder.
  • the first electromagnetic actuator 1 according to the seventh embodiment arranges the buffer material 41 in the suction portion 15 of the core 2 to which the opening shock is applied, and applies the opening shock to the buffer material. It has a configuration. As a result, the first electromagnetic actuator 1 according to the seventh embodiment can prevent plastic deformation of the suction portion 15 of the core 2 that gives an initial load force in the opposite direction, and can suppress variations in the initial load force. The drive characteristics do not deteriorate.
  • the buffer material 41 a non-magnetic metal such as stainless steel that is relatively hard to be plastically deformed or an elastic member such as rubber or resin that can absorb an impact can be used.
  • the buffer material 41 a non-magnetic metal such as stainless steel that is relatively hard to be plastically deformed or an elastic member such as rubber or resin that can absorb an impact can be used.
  • a method of arranging the buffer material 41 in the core 2 the case of FIG.
  • FIG. 23 is a partial view of a second electromagnetic actuator according to the seventh embodiment of the present invention
  • FIG. 24 is a view of the cushioning material of FIG.
  • the second electromagnetic actuator 1 of the seventh embodiment shown in FIG. 23 is an example in which the area of the suction portion 15 of the core 2 is made smaller than that of the first electromagnetic actuator 1 of the seventh embodiment shown in FIG. .
  • the magnetic gap between the attracting portion 15 of the core 2 and the attracting portion 16 of the amateur 3 that gives an initial load force in the opposite direction can be adjusted, and the magnitude of the reverse initial load force can be adjusted. Can be adjusted easily. Therefore, it is possible to stabilize the drive characteristics of the electromagnetic actuator 1 that change in accordance with component variations and assembly variations by adjusting the initial load force in the opposite direction by changing the thickness of the buffer material 41.
  • FIG. 25 is a partial view of a third electromagnetic actuator according to Embodiment 7 of the present invention
  • FIG. 26 is a view showing the cushioning material of FIG. 27 is a partial view of a fourth electromagnetic actuator according to the seventh embodiment of the present invention
  • FIG. 28 is a view of the cushioning material of FIG.
  • the electromagnetic actuator 1 according to the seventh embodiment shown in FIGS. 25 and 27 includes at least a part of the suction part 16 of the circumferential extension 11b in the amateur 3 and the suction part 16 of the amateur 3 to which the opening impact is applied.
  • a buffer material 41 is arranged so as to be interposed between the suction portion 15 of the core 2 and a contact opening shock is applied to the buffer material.
  • suction part 16 of the amateur 3 is formed. Since the portion of the circumferentially extending portion 11b in the armature 3 facing the core 2 is the suction portion 16, the portion of the cushioning material 41 opposite to the coil shaft 4a (portion on the outer peripheral side) is the suction portion 16 of the armature 3 and the core 2 It is a part of the buffer material 41 arrange
  • the electromagnetic actuator 1 according to the seventh embodiment includes a first magnetic path M1 through which a magnetic flux passes through an attracting portion 15 provided inside the core 2, and an armature 3 on the outside of the first magnetic path M1 and a magnetic flux.
  • the second magnetic path M2 through which the armature passes is formed, so that a stable initial load force can be applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1.
  • the electromagnetic actuator 1 according to the seventh embodiment includes the buffer material 41 between the suction portions 15 of the core 2 or the suction portion 16 of the armature 3, even if the rigidity of the suction portion 15 of the core 2 is small, the core 2.
  • the plastic deformation of the suction portion 15 can be prevented, and variations in the initial load force can be suppressed.
  • the electromagnetic actuator 1 of Embodiment 7 can maintain the drive characteristic of an electromagnetic actuator with favorable. That is, the electromagnetic actuator 1 of Embodiment 7 can extend the product life.
  • the opening / closing device 50 according to the seventh embodiment includes a first magnetic path M1 through which the magnetic flux passes through the attracting portion 15 provided inside the core 2, and an armature 3 that faces the armature 3 outside the first magnetic path M1. Since the electromagnetic actuator 1 that forms the second magnetic path M2 through which the armature passes is provided, a stable initial load force is applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1. Thus, the closing operation for closing the current interrupting portion 21 can be reliably performed.
  • the opening / closing device 50 according to the seventh embodiment includes the buffer material 41 between the suction part 15 of the core 2 or the suction part 16 of the amateur 3 in the electromagnetic actuator 1.
  • the opening / closing device 50 according to the seventh embodiment can maintain the drive characteristics of the electromagnetic actuator in good condition, and can reliably perform the closing operation for closing the current interrupting unit 21 for a long period of time.
  • FIG. 29 and 30 are diagrams illustrating coil current control of the electromagnetic actuator according to the eighth embodiment of the present invention.
  • FIG. 29 is a diagram for explaining the current value control of the coil current
  • FIG. 30 is a diagram for explaining the timing of the coil current value control.
  • 31, FIG. 32 and FIG. 33 are diagrams showing examples of the current supply device according to the eighth embodiment of the present invention.
  • 34 and 35 are schematic cross-sectional views of the electromagnetic actuator according to the eighth embodiment of the present invention.
  • FIG. 34 shows the second state of the electromagnetic actuator 1, that is, the closing state of the switching device 50 (see FIG. 2).
  • FIG. 35 shows the first state of the electromagnetic actuator 1, that is, the opening state of the switching device 50 (see FIG. 1). ).
  • the basic configuration of the electromagnetic actuator 1 and the opening / closing device 50 according to the eighth embodiment is the same as FIGS. 1 to 4 showing the first embodiment.
  • the electromagnetic actuator 1 of the eighth embodiment differs from the electromagnetic actuator 1 of the first embodiment in that it includes a current supply device 43 that performs coil current control that reduces or prevents bounce of the armature 3 due to the opening impact.
  • the electromagnetic actuator 1 closes the contacts (movable contact 22 and fixed contact 23) of the current interrupting part 21 via the link mechanism 24.
  • the electromagnetic actuator 1 when the current interrupting portion 21 of the switchgear 50 is opened, the opening impact caused by the collision between the armature 3 and the core 2 is applied to the armature 3, and the armature 3 is shown in FIGS. 34 and 35. Bounce upwards.
  • the bounce of the amateur 3 moves the movable contact 22 through the link mechanism 24 in a direction (downward in the drawing in FIG. 1) that closes the contact (movable contact 22, fixed contact 23) of the current interrupting portion 21.
  • the separation distance between them that is, the separation distance between the movable contact 22 and the fixed contact 23 is reduced, and the breaking performance of the switchgear 50 is lowered.
  • FIG. 29 shows an example of drive characteristics of the electromagnetic actuator 1 at the opening position (see FIG. 1) in the first embodiment.
  • the vertical axis represents the applied force
  • the horizontal axis represents the coil current.
  • the coil current is supplied from the coil power supply 45 or another coil power supply.
  • the magnetic flux passing through the magnetic path M1 is larger than the magnetic flux passing through the magnetic path M2.
  • the magnetic gap that provides the attractive force in the opening direction (downward direction in FIG. 1) in the magnetic path M1 is small. It is possible to make the output of the actuator 1 negative (downward in FIG. 1).
  • a certain coil current for example, a coil current having a current value Ic2 is applied so that the negative applying force shown in FIG. 29 is generated immediately before the armature 3 is bounced when an opening shock is applied to the armature 3.
  • an attractive force in the opening direction of the opening / closing device 50 (downward in the drawing in FIG. 1) is generated in the amateur 3, and it is possible to reduce bounce of the amateur 3 due to the opening impact.
  • the electromagnetic actuator 1 according to the eighth embodiment can suppress the decrease in the separation distance between the contacts of the current interrupting portion 21, that is, the separation distance between the movable contact 22 and the fixed contact 23, and the current interruption of the switching device 50. Performance degradation can be prevented.
  • FIG. 30 shows the stroke characteristics of the armature 3 when the contact of the current interrupting part 21 is changed from the closed state to the open state.
  • the vertical axis is an amateur stroke
  • the horizontal axis is time. The stroke value of the armature 3 shown in FIG.
  • the electromagnetic actuator 1 of the eighth embodiment includes a coil power supply 45 having a timer 46, for example (FIG. 31).
  • the coil power supply 45 energizes a certain coil current, for example, a coil current having a current value Ic2, when the time counted by the timer after the opening operation of the current interrupting unit 21 is started becomes T1.
  • the coil power supply 45 is the current supply device 43 described above.
  • the second energization method As the second energization method, as shown in FIG. 32, the armature stroke shown in FIG. 30 is measured using a stroke detector 47 such as a laser displacement meter or a potentiometer, and the final opening position (maximum opening) of the current interrupting unit 21 is measured. Just before the stroke value St1 that is the pole position), a control to energize a certain coil current, for example, the coil current having the current value Ic2, may be performed.
  • a current supply device 43 that executes the second energization method shown in FIG. 32 is an example including a coil power supply 45 and a stroke detector 47.
  • a change in acceleration is measured with an acceleration sensor 48 or the like attached to the core 2 or the amateur 3, and an inflection that occurs at the moment when the opening impact is applied to the amateur 3.
  • a control method of energizing a certain coil current for example, a coil current having a current value Ic2 is also conceivable.
  • a current supply device 43 that executes the third energization method shown in FIG. 33 is an example including a coil power supply 45 and an acceleration sensor 48. Still other methods are possible.
  • the switch 51 is forcibly turned on (ON) by the stroke of the armature 3, and a certain current, for example, a coil current having a current value Ic2 is energized to the coil. Configuration is also conceivable.
  • the electromagnetic actuator 1 includes, for example, a mechanically operated switch 51 and a DC power source 52 that energizes a certain coil current, for example, a coil current having a current value Ic2. ing.
  • the switch 51 is disposed at a position where the switch 51 is turned on immediately before or when the armature 3 collides with the core 2. Once the switch 51 is turned on, it remains on even if the amateur 3 bounces. The switch 51 is turned off when the current interrupting unit 21 is switched to the closed state, that is, the switching device 50 is closed. Note that the DC power supply 52 stops energization of the current when the current interrupting unit 21 is completely opened.
  • a current supply device 43 that executes the fourth energization method shown in FIGS. 34 and 35 is an example including a switch 51 and a DC power supply 52.
  • 34 and 35 show cross-sectional views of the electromagnetic actuator 1, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like.
  • the outer peripheral lines that are originally visible from the cross section of the left and right coils 4 are omitted so that the lead lines and the like are not easily seen.
  • the electromagnetic actuator 1 according to the eighth embodiment when the opening / closing device 50 is opened, a negative applying force shown in FIG. 29 is generated immediately before the opening impact is applied to the armature 3 and the armature 3 bounces. Since a constant coil current, for example, a coil current having a current value Ic2 is applied, the armature 3 generates an attractive force in the opening direction of the switchgear 50 (downward in the drawing in FIG. 1), and the armature 3 due to the opening shock. Bounce can be reduced. As a result, the electromagnetic actuator 1 according to the eighth embodiment can suppress the decrease in the separation distance between the contacts of the current interrupting portion 21, that is, the separation distance between the movable contact 22 and the fixed contact 23, and the current interruption of the switching device 50. Performance degradation can be prevented.
  • the negative applying force shown in FIG. 29 is applied immediately before the armature 3 bounces when an opening impact is applied to the armature 3. Since a certain coil current to be generated, for example, a coil current having a current value Ic2, is applied, bounce of the armature 3 due to the opening impact can be reduced, and the separation distance between the contacts of the current interrupting portion 21, that is, the movable contact 22 And the contact distance between the fixed contact 23 can be suppressed, and the current interruption performance of the switching device 50 can be prevented from being lowered.
  • a certain coil current to be generated for example, a coil current having a current value Ic2
  • the switch 51 is not limited to a mechanically operated switch pushed by the amateur 3, and may be another switch. For example, it may be turned on with a trigger signal indicating that signals from the stroke detector 47 and the acceleration sensor 48 have exceeded a predetermined threshold.
  • the coil current control method for reducing the bounce of the armature 3 due to the opening impact shown in the eighth embodiment can also be applied to the electromagnetic actuator 1 and the switchgear 50 according to the second to seventh embodiments.
  • Electromagnetic actuator 2 ... Core, 3 ... Amateur, 4 ... Coil, 4a ... Coil shaft, 6a ... Nonmagnetic material, 7 ... Core body part, 8 ... Core lid part, 8a ... Inner side surface, 9 ... Core open end 9a ... inner peripheral surface, 9b ... inner side surface, 9c ... projection, 10 ... core extension, 11 ... amateur root, 11b ... circumferential extension, 11c ... projection, 12 ... amateur extension, 14 ... Opening, 15 ... suction part, 21 ... current interrupting part, 22 ... movable contact, 23 ... fixed contact, 24 ... link mechanism, 41 ... buffer material, 43 ... current supply device, 50 ... switchgear, G1, G2, G4 ... Magnetic gap, L1 ... Accumulation tolerance, M1, M2, M3 ... Magnetic path

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The objective of the invention is to obtain an electromagnetic actuator capable of, when driving an armature, applying a stable initial loading force onto the armature without leaking magnetic flux to the exterior. This electromagnetic actuator (1) comprises: a root base portion (armature root base portion (11)); an armature (3) having an extension portion (armature extension portion (12)) whereof the external diameter is smaller than the root base portion (11) and provided so as to extend from the root base portion (11) in the direction of a coil axis (4a) of a coil (4); and a core (2), which is a magnetic body forming together with the armature (3) a magnetic path wherethrough a magnetic flux generated by the coil (4) passes. The core (2) has: on the inner side thereof, an attraction portion (15) generating an attractive force between the core and a peripherally extending portion (11b) due to the passage of magnetic flux therethrough; and, facing the armature (3), an armature-facing portion (inner peripheral surface (9a)) forming a second magnetic path (M2) wherethrough magnetic flux passes, on the outer side of a first magnetic path (M1) wherein magnetic flux passes through the suction portion (15).

Description

電磁アクチュエータ及び開閉装置Electromagnetic actuator and switchgear
　本発明は、電磁操作型開閉装置などの開閉操作に用いられる電磁アクチュエータに関するものである。 The present invention relates to an electromagnetic actuator used for opening and closing operations such as an electromagnetically operated switching device.
　電磁操作型開閉装置などでは、電流遮断部を開路状態にしたり、閉路状態にしたりする開閉操作において、電磁アクチュエータが使用されている。特許文献１には、電流の通電及び遮断を行う電流遮断部に相当する真空遮断器を、リンク機構を介して開閉操作する遮断器投入用の電磁石装置が記載されている。 In an electromagnetically operated switchgear or the like, an electromagnetic actuator is used in an opening / closing operation that opens or closes the current interrupting portion. Patent Document 1 describes an electromagnet device for closing a circuit breaker that opens and closes a vacuum circuit breaker corresponding to a current interrupting unit that conducts and interrupts current via a link mechanism.
　特許文献１の図７に記載された投入用の電磁石装置は、ソレノイドコイル、ソレノイドコイルの軸方向に往復動自在な磁性体のアマチュア（特許文献１のプランジャー３）、ソレノイドコイルの周囲に配置され磁束の経路となるコア（特許文献１のヨーク５）、アマチュアの下面を支持する磁性体の磁性支持板、磁性支持板とコアの下端部（特許文献１の下端板５Ｃ）とを接続する磁性体の磁性支柱を備えた電磁アクチュエータである。また、コアの下端部とアマチュアとの間には、ソレノイドコイルの軸方向の上下に非磁性体のスペーサで挟まれた空隙が形成されている。 The electromagnetic device for insertion described in FIG. 7 of Patent Document 1 is arranged around a solenoid coil, an armature of a magnetic material that can reciprocate in the axial direction of the solenoid coil (plunger 3 of Patent Document 1), and a solenoid coil. The core (the yoke 5 of Patent Document 1) serving as a magnetic flux path, the magnetic support plate of the magnetic material that supports the lower surface of the armature, and the magnetic support plate and the lower end portion of the core (the lower end plate 5C of Patent Document 1) are connected. It is an electromagnetic actuator provided with the magnetic support | pillar of a magnetic body. Further, a gap sandwiched between non-magnetic spacers is formed between the lower end portion of the core and the amateur in the axial direction of the solenoid coil.
　特許文献１に記載された電磁アクチュエータは、遮断器を投入する際にソレノイドコイルに電流を流すことで、アマチュアを磁性支持板から離脱させて上方向に移動させる。ソレノイドコイルに電圧を印加して電流を流すと、通電初期における電流値の小さいときは、非磁性体のスペーサ及び空隙があるため、アマチュアを通る磁束は主として磁性支持板および磁性支柱を通して流れる。この磁束によってアマチュアは、磁性支持板に吸引される。この吸引力は、アマチュアを駆動する駆動力を打ち消す方向に働く力であり、アマチュア駆動の初期に負荷として働く初期負荷力である。時間の経過とともにソレノイドコイルの電流が増大すると、磁性支持板は比較的薄い板で構成されているので直ぐに磁気飽和に達し、アマチュアと磁性支持板との間の吸引力はほぼ一定に抑えられる。これに対して、アマチュアから空隙を介してコアの下端部に流入する磁束は、ソレノイドコイルの電流値の増大とともに大きくなるため、アマチュアを磁性支持板から離脱させて上方向に引き上げる駆動力は電流値の増大とともに増加する。このアマチュアの上方向の駆動力がアマチュアと磁性支持板との間の吸引力を越えると、アマチュアは磁性支持板から離脱して上方向に移動し、アマチュアの上面に固定されたシャフト（ロッド）が送出されて、この電磁アクチュエータは遮断器を投入する。 The electromagnetic actuator described in Patent Document 1 causes the armature to move away from the magnetic support plate by causing a current to flow through the solenoid coil when the circuit breaker is turned on. When a current is applied by applying a voltage to the solenoid coil, the magnetic flux passing through the armature flows mainly through the magnetic support plate and the magnetic column because there are nonmagnetic spacers and air gaps when the current value at the initial energization is small. The amateur is attracted to the magnetic support plate by this magnetic flux. This suction force is a force that works in a direction that cancels the driving force that drives the amateur, and is an initial load force that acts as a load in the early stage of amateur driving. When the current of the solenoid coil increases with the passage of time, the magnetic support plate is composed of a relatively thin plate, so that magnetic saturation is reached immediately, and the attractive force between the amateur and the magnetic support plate is kept almost constant. On the other hand, the magnetic flux flowing from the amateur through the air gap into the lower end of the core increases as the current value of the solenoid coil increases, so the driving force that lifts the amateur away from the magnetic support plate and pulls it upward is the current. Increases with increasing value. When the upward driving force of the amateur exceeds the attractive force between the amateur and the magnetic support plate, the amateur moves away from the magnetic support plate and moves upward, and the shaft (rod) fixed to the upper surface of the amateur Is delivered and the electromagnetic actuator turns on the circuit breaker.
　このような構成にすることで、特許文献１に記載された電磁アクチュエータは、磁性支持板を設けない場合に比べて、コイル電流が十分大きくなるまで、アマチュアと磁性支持板間に生じる吸引力によってアマチュアを保持できるようにしていた。したがって、特許文献１に記載された電磁アクチュエータは、コイル電流が十分大きなってからアマチュアを移動させるので、アマチュアの駆動力を増加することができ、アマチュアを所定の位置まで確実に移動させることが可能となる。 By adopting such a configuration, the electromagnetic actuator described in Patent Document 1 has an attractive force generated between the armature and the magnetic support plate until the coil current becomes sufficiently large as compared with the case where the magnetic support plate is not provided. I was able to hold an amateur. Therefore, since the electromagnetic actuator described in Patent Document 1 moves the armature after the coil current is sufficiently large, the driving force of the armature can be increased, and the armature can be reliably moved to a predetermined position. It becomes possible.
特開平７－３７４６０号公報（段落０００２～０００３、図７）Japanese Unexamined Patent Publication No. 7-37460 (paragraphs 0002 to 0003, FIG. 7)
　前述の電磁アクチュエータでは、アマチュアとアマチュアの下側に配置された磁性支持板との間に発生する吸引力によって、このアマチュアの駆動力を打ち消す方向に働く初期負荷力を付与している。しかし、初期負荷力を生じさせる磁気回路が電磁アクチュエータの外部に面しているので、この磁気回路が磁気飽和すると、電磁アクチュエータの外部には漏れ磁束が生じる。このため、特許文献１に記載された電磁アクチュエータは、周辺に磁性体を含む機器あるいは電磁アクチュエータの締結部材などの治具が配置されると、周辺の磁性体から磁性支持板を経由して想定以上の磁束がアマチュアに流れることがあり、アマチュアを駆動する駆動力と逆向きの初期負荷力が増大しアマチュアを駆動できない。すなわち、特許文献１に記載された電磁アクチュエータは、磁気回路が磁気飽和すると、電磁アクチュエータの外部に磁束が漏れるので、周辺に磁性体が配置された場合にアマチュアに付与される初期負荷力が変動してしまい、電磁アクチュエータの駆動特性が悪化する問題がある。 In the electromagnetic actuator described above, an initial load force acting in a direction to cancel out the driving force of the amateur is applied by an attractive force generated between the amateur and a magnetic support plate disposed below the amateur. However, since the magnetic circuit that generates the initial load force faces the outside of the electromagnetic actuator, when this magnetic circuit is magnetically saturated, leakage magnetic flux is generated outside the electromagnetic actuator. For this reason, the electromagnetic actuator described in Patent Document 1 is assumed from a peripheral magnetic body via a magnetic support plate when a device including a magnetic body or a jig such as a fastening member of the electromagnetic actuator is disposed around the electromagnetic actuator. The above magnetic flux may flow to the amateur, and the initial load force in the direction opposite to the driving force for driving the amateur increases, so that the amateur cannot be driven. That is, in the electromagnetic actuator described in Patent Document 1, when the magnetic circuit is magnetically saturated, the magnetic flux leaks to the outside of the electromagnetic actuator, so that the initial load force applied to the amateur varies when a magnetic body is disposed around the electromagnetic actuator. As a result, there is a problem that the drive characteristics of the electromagnetic actuator deteriorate.
　特許文献１に記載された電磁アクチュエータは、初期負荷力を生じさせる磁気回路が電磁アクチュエータの外部に面しているので、この磁気回路が磁気飽和すると、電磁アクチュエータの外部には漏れ磁束が生じるので、周辺に磁性体が配置された場合には、この磁性体を含む周辺機器の故障または誤動作を招き、また、磁性を含んでいない周辺機器であっても強力な漏れ磁束により故障または誤動作が生じる原因となる。 In the electromagnetic actuator described in Patent Document 1, the magnetic circuit that generates the initial load force faces the outside of the electromagnetic actuator. When this magnetic circuit is magnetically saturated, a leakage magnetic flux is generated outside the electromagnetic actuator. If a magnetic material is disposed around the peripheral device, it may cause a failure or malfunction of a peripheral device including the magnetic material, and even a peripheral device that does not include magnetism may cause a failure or malfunction due to strong magnetic flux leakage. Cause.
　本発明は、上述の課題を解決するものであり、電磁アクチュエータの外部に磁束を漏らすことなく、アマチュアを駆動する際に安定した初期負荷力をアマチュアに付与できる電磁アクチュエータを得ることを目的とする。 The present invention solves the above-described problems, and an object of the present invention is to obtain an electromagnetic actuator that can give a stable initial load force to an amateur when driving the amateur without leaking magnetic flux outside the electromagnetic actuator. .
　本発明の電磁アクチュエータは、コイルの内部に可動自在に配置された磁性体のアマチュアを、コイルにより発生させた磁束により駆動する。電磁アクチュエータは、コイルと、根元部と、根元部からコイルのコイル軸の方向に延伸して設けられると共に根元部よりも外径の小さな延伸部を有するアマチュアと、コイルの外側に配置されており、アマチュアと共にコイルにより発生された磁束が通過する磁路を形成する磁性体のコアと、を備え、アマチュアは、延伸部の外周からコイル軸に垂直な周方向に延伸した周方向拡張部を有し、コアは、アマチュアの周方向拡張部に対向して設けられると共に、磁束が通過することにより周方向拡張部との間に吸引力を発生させる吸引部、を当該コアの内側に有し、吸引部を磁束が通過する第一の磁路の外側に、アマチュアに対向すると共に磁束が通過する第二の磁路を形成するアマチュア対向部を有することを特徴とする。 The electromagnetic actuator of the present invention drives a magnetic armature that is movably disposed inside a coil by magnetic flux generated by the coil. The electromagnetic actuator is disposed on the outside of the coil, the root portion, the armature that extends from the root portion in the direction of the coil axis of the coil and has an extending portion having a smaller outer diameter than the root portion, and the coil. A magnetic core that forms a magnetic path through which the magnetic flux generated by the coil passes with the armature, and the armature has a circumferentially extending portion that extends in the circumferential direction perpendicular to the coil axis from the outer periphery of the extending portion. The core is provided opposite to the circumferential extension portion of the amateur, and has a suction portion that generates an attractive force between the core and the circumferential extension portion when the magnetic flux passes, It has the armature opposing part which forms the 2nd magnetic path which opposes an amateur and passes a magnetic flux outside the 1st magnetic path through which a magnetic flux passes an attraction | suction part.
　本発明の電磁アクチュエータは、コアの内側に設けられた吸引部を磁束が通過する第一の磁路と、第一の磁路の外側にアマチュアに対向すると共に磁束が通過する第二の磁路を形成するので、電磁アクチュエータの外部に磁束を漏らすことなく、アマチュアを駆動する際に安定した初期負荷力をアマチュアに付与することができる。 The electromagnetic actuator of the present invention includes a first magnetic path through which a magnetic flux passes through an attraction portion provided inside a core, and a second magnetic path through which the magnetic flux passes while facing the armature outside the first magnetic path. Therefore, a stable initial load force can be applied to the armature when driving the armature without leaking the magnetic flux to the outside of the electromagnetic actuator.
本発明の実施の形態１による電磁アクチュエータ及び開閉装置を示す図である。It is a figure which shows the electromagnetic actuator and switchgear by Embodiment 1 of this invention. 本発明の実施の形態１による電磁アクチュエータ及び開閉装置を示す図である。It is a figure which shows the electromagnetic actuator and switchgear by Embodiment 1 of this invention. 本発明の実施の形態１による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 1 of this invention. 図３の電磁アクチュエータの要部を示す概略断面図である。It is a schematic sectional drawing which shows the principal part of the electromagnetic actuator of FIG. 本発明の実施の形態２による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 2 of this invention. 図５の電磁アクチュエータの要部を示す概略断面図である。It is a schematic sectional drawing which shows the principal part of the electromagnetic actuator of FIG. 本発明の実施の形態２による他の電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the other electromagnetic actuator by Embodiment 2 of this invention. 図７の電磁アクチュエータの要部を示す概略断面図である。It is a schematic sectional drawing which shows the principal part of the electromagnetic actuator of FIG. 本発明の実施の形態２による電磁アクチュエータの付与力の例を示す図である。It is a figure which shows the example of the provision force of the electromagnetic actuator by Embodiment 2 of this invention. 本発明の実施の形態３による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 3 of this invention. 図１０の電磁アクチュエータの要部を示す概略断面図である。It is a schematic sectional drawing which shows the principal part of the electromagnetic actuator of FIG. 本発明の実施の形態４による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 4 of this invention. 本発明の実施の形態４による他の電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the other electromagnetic actuator by Embodiment 4 of this invention. 本発明の実施の形態５による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 5 of this invention. 本発明の実施の形態５による他の電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the other electromagnetic actuator by Embodiment 5 of this invention. 本発明の実施の形態６による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 6 of this invention. 本発明の実施の形態６による電磁アクチュエータのコイル電流の例を示す図である。It is a figure which shows the example of the coil current of the electromagnetic actuator by Embodiment 6 of this invention. 本発明の実施の形態７による電磁アクチュエータ及び開閉装置を示す図である。It is a figure which shows the electromagnetic actuator and switchgear by Embodiment 7 of this invention. 本発明の実施の形態７による電磁アクチュエータ及び開閉装置を示す図である。It is a figure which shows the electromagnetic actuator and switchgear by Embodiment 7 of this invention. 本発明の実施の形態７による第一の電磁アクチュエータの部分図である。It is a fragmentary view of the 1st electromagnetic actuator by Embodiment 7 of this invention. 図２０のコア及びアマチュアの部分図である。FIG. 21 is a partial view of the core and amateur of FIG. 20. 図２０の緩衝材の図である。It is a figure of the shock absorbing material of FIG. 本発明の実施の形態７による第二の電磁アクチュエータの部分図である。It is a fragmentary figure of the 2nd electromagnetic actuator by Embodiment 7 of this invention. 図２３の緩衝材の図である。It is a figure of the shock absorbing material of FIG. 本発明の実施の形態７による第三の電磁アクチュエータの部分図である。It is a fragmentary view of the 3rd electromagnetic actuator by Embodiment 7 of this invention. 図２５の緩衝材を示す図である。It is a figure which shows the shock absorbing material of FIG. 本発明の実施の形態７による第四の電磁アクチュエータの部分図である。It is a fragmentary figure of the 4th electromagnetic actuator by Embodiment 7 of this invention. 図２７の緩衝材の図である。It is a figure of the shock absorbing material of FIG. 本発明の実施の形態８の電磁アクチュエータのコイル電流制御を説明する図である。It is a figure explaining the coil current control of the electromagnetic actuator of Embodiment 8 of this invention. 本発明の実施の形態８の電磁アクチュエータのコイル電流制御を説明する図である。It is a figure explaining the coil current control of the electromagnetic actuator of Embodiment 8 of this invention. 本発明の実施の形態８による電流供給装置の例を示す図である。It is a figure which shows the example of the electric current supply apparatus by Embodiment 8 of this invention. 本発明の実施の形態８による電流供給装置の例を示す図である。It is a figure which shows the example of the electric current supply apparatus by Embodiment 8 of this invention. 本発明の実施の形態８による電流供給装置の例を示す図である。It is a figure which shows the example of the electric current supply apparatus by Embodiment 8 of this invention. 本発明の実施の形態８による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 8 of this invention. 本発明の実施の形態８による電磁アクチュエータの概略断面図である。It is a schematic sectional drawing of the electromagnetic actuator by Embodiment 8 of this invention.
実施の形態１．
　図１及び図２は、本発明の実施の形態１による電磁アクチュエータ及び開閉装置を示す図である。図１は電磁アクチュエータの第一状態を示しており、図２は電磁アクチュエータの第二状態を示している。図３は本発明の実施の形態１による電磁アクチュエータの概略断面図であり、図４は図３の電磁アクチュエータの要部を示す概略断面図である。電磁アクチュエータ１は、磁性体のコア２と、コア２の内部に可動自在に設けられた磁性体のアマチュア３と、コア２とアマチュア３により形成された磁路に磁束を発生させるコイル４と、アマチュア３に固定されると共にコア２を貫通するシャフト５と、コア２とアマチュア３との間に、コイル４が発生させた磁束が通過することにより互いに吸引力を発生させて、アマチュア３をシャフト５が送出される方向に駆動する駆動力を打ち消す方向に働く負荷力を付与する吸引部１５、１６を備える。コア２は、アマチュア３と共にコイル４により発生された磁束が通過する磁路を形成する。開閉装置５０は、電磁アクチュエータ１と、リンク機構２４と、電流遮断部２１を備える。シャフト５はリンク機構２４を介して開閉装置５０の電流遮断部２１に接続されている。電流遮断部２１は、内部に可動接点２２と固定接点２３を備えている。開閉装置５０は、電流遮断部２１の可動接点２２をリンク機構２４を介して、固定接点２３に接続するように移動させて、電流遮断部２１を閉路状態にする閉路操作を行う。シャフト５は、延伸方向に通過する中心軸がコイル４の開口中心を通過するコイル軸４ａと一致するように配置されている。なお、アマチュア３がシャフト５の露出端部５ａへ移動し、吸引部１５と吸引部１６との磁気ギャップが増大すると、吸引部１５と吸引部１６との間の吸引力は急激に小さくなり、アマチュア３をシャフト５が送出される方向に駆動する駆動力を打ち消す方向に働く負荷力は、アマチュア３の駆動初期に発生するので、適宜、初期負荷力と称する。アマチュア３がシャフト５の露出端部５ａへ移動する方向は、アマチュア３が第一状態から第二状態になる方向でもあるので、アマチュア３をシャフト５が送出される方向に駆動する駆動力は、アマチュア３を第一状態から第二状態に駆動する駆動力である。 Embodiment 1 FIG.
1 and 2 are diagrams showing an electromagnetic actuator and a switchgear according to Embodiment 1 of the present invention. FIG. 1 shows a first state of the electromagnetic actuator, and FIG. 2 shows a second state of the electromagnetic actuator. FIG. 3 is a schematic cross-sectional view of the electromagnetic actuator according to Embodiment 1 of the present invention, and FIG. 4 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG. The electromagnetic actuator 1 includes a magnetic core 2, a magnetic armature 3 movably provided inside the core 2, a coil 4 that generates a magnetic flux in a magnetic path formed by the core 2 and the armature 3, and A magnetic force generated by the coil 4 passes between the shaft 5 fixed to the amateur 3 and penetrating the core 2 and between the core 2 and the armature 3 to generate an attraction force. There are provided suction portions 15 and 16 for applying a load force acting in a direction to cancel the drive force for driving in the direction in which 5 is delivered. The core 2 and the armature 3 form a magnetic path through which the magnetic flux generated by the coil 4 passes. The opening / closing device 50 includes the electromagnetic actuator 1, the link mechanism 24, and the current interrupting unit 21. The shaft 5 is connected to the current interrupting part 21 of the switching device 50 via the link mechanism 24. The current interrupting unit 21 includes a movable contact 22 and a fixed contact 23 inside. The switchgear 50 moves the movable contact 22 of the current interrupting part 21 so as to be connected to the fixed contact 23 via the link mechanism 24, and performs a closing operation to bring the current interrupting part 21 into a closed state. The shaft 5 is disposed so that the central axis passing in the extending direction coincides with the coil axis 4 a passing through the opening center of the coil 4. When the armature 3 moves to the exposed end 5a of the shaft 5 and the magnetic gap between the suction part 15 and the suction part 16 increases, the attractive force between the suction part 15 and the suction part 16 decreases rapidly, The load force that works in the direction that cancels the drive force that drives the amateur 3 in the direction in which the shaft 5 is delivered is generated in the early stage of driving of the amateur 3, and is therefore referred to as the initial load force as appropriate. The direction in which the amateur 3 moves to the exposed end 5a of the shaft 5 is also the direction in which the amateur 3 changes from the first state to the second state, so the driving force that drives the amateur 3 in the direction in which the shaft 5 is delivered is This is a driving force for driving the amateur 3 from the first state to the second state.
　電磁アクチュエータ１が図１に示す第一状態の場合、すなわちシャフト５の露出端部５ａがコア２に対して近づいている場合は、電流遮断部２１の可動接点２２及び固定接点２３は互いに開離している。また、電磁アクチュエータ１が図２に示す第二状態の場合、すなわちシャフト５の露出端部５ａがコア２に対して離れている場合は、電流遮断部２１の可動接点２２及び固定接点２３は互いに接触している。図１及び図２において、電磁アクチュエータ１は、開閉装置５０の電流遮断部２１を開路状態にしたり、閉路状態にしたりする開閉操作を行う構成例を示した。図１及び図２において、電磁アクチュエータ１及び電流遮断部２１の断面図を示しているが、引き出し線等が見えにくくならないように、断面においてハッチングを省略した。図３及び図４においても、電磁アクチュエータ１の断面図を示しているが、引き出し線等が見えにくくならないように、断面においてハッチングを省略した。また、図１から図４において、左右のコイル４の断面から紙面奥側に本来見える外周線（シャフト５の移動方向に垂直な方向の外周線）も、引き出し線等が見えにくくならないように、省略した。他の断面図においても、同様に断面においてハッチングを省略し、コイル４におけるシャフト５の移動方向に垂直な方向の外周線を省略した。 When the electromagnetic actuator 1 is in the first state shown in FIG. 1, that is, when the exposed end portion 5a of the shaft 5 is approaching the core 2, the movable contact 22 and the fixed contact 23 of the current interrupting portion 21 are separated from each other. ing. When the electromagnetic actuator 1 is in the second state shown in FIG. 2, that is, when the exposed end 5 a of the shaft 5 is away from the core 2, the movable contact 22 and the fixed contact 23 of the current interrupter 21 are mutually connected. In contact. 1 and 2, the electromagnetic actuator 1 shows a configuration example in which an opening / closing operation for opening or closing the current interrupting portion 21 of the opening / closing device 50 is performed. 1 and 2, cross-sectional views of the electromagnetic actuator 1 and the current interrupting unit 21 are shown, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like. 3 and 4 also show cross-sectional views of the electromagnetic actuator 1, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like. In addition, in FIGS. 1 to 4, the outer peripheral line (the outer peripheral line in the direction perpendicular to the moving direction of the shaft 5) that is originally visible from the cross section of the left and right coils 4 on the back side of the drawing surface is not easily visible. Omitted. Similarly, in other cross-sectional views, hatching is omitted in the cross section, and an outer peripheral line in a direction perpendicular to the moving direction of the shaft 5 in the coil 4 is omitted.
　コア２は、コイル４の外周面を囲むコア胴体部７と、コイル４の上側（シャフト５が配置される側）を覆うコア蓋部８と、コア胴体部７の下側（コア蓋部８が配置されない側）からシャフト５の方向に延伸すると共にアマチュア３のアマチュア延伸部１２が外部に露出する開口１４を形成するコア開口端部９とを備える。コア開口端部９は、アマチュア３のアマチュア延伸部１２が挿通可能な開口１４を形成している。コア蓋部８は、コア開口端部９からコイル軸４ａの方向に離れた位置でコア開口端部９に対向している。コア胴体部７は、コア蓋部８とコア開口端部９を接続している。アマチュア３は、シャフト５が接続されたアマチュア根元部１１と、アマチュア根元部１１からコア２の開口１４側に延伸するように設けられると共にアマチュア根元部１１よりも外径の小さなアマチュア延伸部１２を備える。コア２のコア蓋部８には貫通孔が形成されており、この貫通孔をシャフト５が図の上下方向（コイル軸４ａの上下方向）に移動する。コア蓋部８の貫通孔は、その中心軸がコイル軸４ａと一致するように形成されている。また、シャフト５の中心軸はアマチュア３の中心軸と一致している。シャフト５がコア蓋部８の貫通孔に挿入されることで、シャフト５及びアマチュア３の中心軸がコイル軸４ａと一致するように、アマチュア３がコイル４及びコア２の内側に配置される。シャフト５、アマチュア根元部１１、アマチュア延伸部１２は、それぞれ例えば円柱形状である。コイル４は例えば開口が設けられた円筒形状であり、コア２の外形は例えば上部に貫通孔が形成され、下部に開口１４が形成された円柱形状である。 The core 2 includes a core body portion 7 that surrounds the outer peripheral surface of the coil 4, a core lid portion 8 that covers the upper side of the coil 4 (side on which the shaft 5 is disposed), and a lower side (core lid portion 8) of the core body portion 7. And the core opening end portion 9 which extends in the direction of the shaft 5 from the side where the armature 3 is not disposed and forms an opening 14 where the armature extending portion 12 of the armature 3 is exposed to the outside. The core opening end portion 9 forms an opening 14 through which the amateur extending portion 12 of the amateur 3 can be inserted. The core lid portion 8 faces the core opening end portion 9 at a position away from the core opening end portion 9 in the direction of the coil shaft 4a. The core body portion 7 connects the core lid portion 8 and the core opening end portion 9. The amateur 3 includes an amateur root portion 11 to which the shaft 5 is connected, and an amateur extending portion 12 provided so as to extend from the amateur root portion 11 to the opening 14 side of the core 2 and having an outer diameter smaller than that of the amateur root portion 11. Prepare. A through hole is formed in the core lid portion 8 of the core 2, and the shaft 5 moves through the through hole in the vertical direction in the figure (the vertical direction of the coil shaft 4 a). The through hole of the core lid part 8 is formed so that the central axis thereof coincides with the coil axis 4a. Further, the central axis of the shaft 5 coincides with the central axis of the amateur 3. By inserting the shaft 5 into the through hole of the core lid portion 8, the armature 3 is disposed inside the coil 4 and the core 2 so that the central axis of the shaft 5 and the armature 3 coincides with the coil axis 4 a. Each of the shaft 5, the amateur root portion 11, and the amateur extending portion 12 has a cylindrical shape, for example. The coil 4 has, for example, a cylindrical shape with an opening, and the outer shape of the core 2 has, for example, a cylindrical shape in which a through hole is formed in the upper part and an opening 14 is formed in the lower part.
　アマチュア３は、アマチュア根元部１１の外周面１１ａがコイル４の内周面に対向しており、アマチュア延伸部１２の外周面１２ａがコア２におけるコア開口端部９の内周面９ａに対向して配置されている。内周面９ａは、アマチュア３の外周面１２ａに対向すると共にコイル４により発生された磁束が通過する磁路Ｍ２を形成するアマチュア対向部である。アマチュア延伸部１２の外径はアマチュア根元部１１の外径よりも小さくなっている。アマチュア根元部１１のアマチュア延伸部１２側には、アマチュア延伸部１２の外周から周方向に延伸した周方向拡張部１１ｂが形成されている。アマチュア根元部１１における周方向拡張部１１ｂの一部は、コア２におけるコア開口端部９の内側面９ｂの一部に対向している。周方向拡張部１１ｂとコア開口端部９の内側面９ｂとが対向する部分が吸引部１５、１６である。すなわち、コア２におけるコア開口端部９の吸引部１５と、アマチュア３における周方向拡張部１１ｂの吸引部１６は互いに対向している。 In the amateur 3, the outer peripheral surface 11 a of the amateur root portion 11 faces the inner peripheral surface of the coil 4, and the outer peripheral surface 12 a of the amateur extension portion 12 faces the inner peripheral surface 9 a of the core opening end 9 in the core 2. Are arranged. The inner peripheral surface 9a is an amateur facing portion that forms a magnetic path M2 that faces the outer peripheral surface 12a of the armature 3 and through which the magnetic flux generated by the coil 4 passes. The outer diameter of the amateur extending portion 12 is smaller than the outer diameter of the amateur root portion 11. On the amateur extending portion 12 side of the amateur root portion 11, a circumferentially extending portion 11b extending in the circumferential direction from the outer periphery of the amateur extending portion 12 is formed. A portion of the circumferentially extending portion 11 b in the amateur root portion 11 faces a portion of the inner side surface 9 b of the core opening end portion 9 in the core 2. The portions where the circumferentially extending portion 11 b and the inner side surface 9 b of the core opening end portion 9 face each other are suction portions 15 and 16. That is, the suction portion 15 of the core opening end portion 9 in the core 2 and the suction portion 16 of the circumferential extension portion 11b in the armature 3 face each other.
　コア２の吸引部１５は、コイル軸４ａ側（内周側）の端がコア開口端部９の内周面９ａであり、外周側の端がアマチュア３におけるアマチュア根元部１１の外周面１１ａからコイル軸４ａに平行に伸ばした破線３１が通過する位置である。アマチュア３の吸引部１６は、外周側の端がアマチュア根元部１１の外周面１１ａであり、コイル軸４ａ側（内周側）の端がコア２におけるコア開口端部９の内周面９ａからコイル軸４ａに平行に伸ばした破線３０が通過する位置である。図１から図４では、アマチュア３の吸引部１６とコア２の吸引部１５との隙間が磁気ギャップＧ１であり、アマチュア３におけるアマチュア延伸部１２の外周面１２ａと、コア２におけるコア開口端部９の内周面９ａとの隙間が磁気ギャップＧ２である例を示した。磁気ギャップＧ１は磁気ギャップＧ２より小さくなっている。また、図１及び図２では、電磁アクチュエータ１における磁気ギャップＧ２は第一状態及び第二状態で変化せず、第一状態における磁気ギャップＧ１が第二状態では磁気ギャップＧ３に変化する例を示した。 The suction portion 15 of the core 2 has an end on the coil shaft 4 a side (inner peripheral side) that is the inner peripheral surface 9 a of the core opening end portion 9, and an outer peripheral end that extends from the outer peripheral surface 11 a of the amateur root portion 11 in the armature 3. This is a position through which a broken line 31 extending parallel to the coil axis 4a passes. The suction part 16 of the amateur 3 has an outer peripheral end that is the outer peripheral face 11 a of the amateur base 11, and an end on the coil shaft 4 a side (inner peripheral side) that extends from the inner peripheral face 9 a of the core opening end 9 in the core 2. This is a position through which a broken line 30 extending parallel to the coil axis 4a passes. In FIG. 1 to FIG. 4, the gap between the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2 is a magnetic gap G1, and the outer peripheral surface 12a of the armature extending portion 12 in the armature 3 and the core opening end portion in the core 2 9 shows an example in which the gap between the inner surface 9a and the inner peripheral surface 9 is a magnetic gap G2. The magnetic gap G1 is smaller than the magnetic gap G2. 1 and 2 show an example in which the magnetic gap G2 in the electromagnetic actuator 1 does not change between the first state and the second state, and the magnetic gap G1 in the first state changes to the magnetic gap G3 in the second state. It was.
　なお、図示はしていないが、リンク機構２４に電磁アクチュエータ１を図２で示した第二状態から図１に示した第一状態に復帰する復帰ばねを設けてもよい。また、本実施の形態において、コア２及びアマチュア３の磁性材として鉄、コバルト、ニッケルなどを使用でき、薄板の積層あるいは一体ものとして構成してもよい。 Although not shown, the link mechanism 24 may be provided with a return spring for returning the electromagnetic actuator 1 from the second state shown in FIG. 2 to the first state shown in FIG. Moreover, in this Embodiment, iron, cobalt, nickel etc. can be used as a magnetic material of the core 2 and the armature 3, and you may comprise as a laminated | stacked or integrated thing of a thin plate.
　電磁アクチュエータ１内の磁束が外部に漏れない原理について説明する。まず、電流遮断部２１の可動接点２２及び固定接点２３は互いに開離している開路状態から、可動接点２２及び固定接点２３は互いに接触する閉路状態に変化する、電磁アクチュエータ１の動作を説明する。図１で示す第一状態の電磁アクチュエータ１のコイル４に、シャフト５の露出端部５ａに向かって右向きに電流が流れると、コイル４の内部においてシャフト５の露出端部５ａ側に向かう磁束が発生する。適宜、コイル４に流れる電流をコイル電流と称する。アマチュア３は、この磁束によりシャフト５の露出端部５ａがコア２から離れるように駆動される。コイル４により発生された磁束は、コイル４の周りを通過する。実施の形態１の電磁アクチュエータ１におけるアマチュア３及びコア２を磁束が通過する経路、すなわち磁路は、２つの磁路Ｍ１と磁路Ｍ２が存在する。磁路Ｍ１はコイル４に近い側に形成された磁路であり、磁路Ｍ２は磁路Ｍ１よりも外側に形成された磁路である。 The principle that the magnetic flux in the electromagnetic actuator 1 does not leak outside will be described. First, the operation of the electromagnetic actuator 1 will be described, in which the movable contact 22 and the fixed contact 23 of the current interrupting part 21 change from the open state where they are separated from each other to the closed state where the movable contact 22 and the fixed contact 23 are in contact with each other. When a current flows to the coil 4 of the electromagnetic actuator 1 in the first state shown in FIG. 1 toward the exposed end 5a of the shaft 5, a magnetic flux directed toward the exposed end 5a of the shaft 5 is generated inside the coil 4. appear. As appropriate, the current flowing through the coil 4 is referred to as a coil current. The amateur 3 is driven by the magnetic flux so that the exposed end 5a of the shaft 5 is separated from the core 2. The magnetic flux generated by the coil 4 passes around the coil 4. There are two magnetic paths M1 and M2 as paths through which the magnetic flux passes through the armature 3 and the core 2 in the electromagnetic actuator 1 of the first embodiment. The magnetic path M1 is a magnetic path formed on the side close to the coil 4, and the magnetic path M2 is a magnetic path formed outside the magnetic path M1.
　図１から図４に示した例では、磁気ギャップＧ１が磁気ギャップＧ２より小さくなっているので、磁路Ｍ１の磁気抵抗は磁路Ｍ２の磁気抵抗より小さくなり、コイル４にコイル電流が流れると、磁束は磁気抵抗が小さい磁路Ｍ１を集中して通過することになる。コイル４に電流が流れ始めた通電初期は、電流値が小さいので、磁束は主に磁路Ｍ１を通過する。磁路Ｍ１を磁束が通過することで、アマチュア３の吸引部１６とコア２の吸引部１５は、共に磁束の向きに沿って同じ向きに磁化されるので、アマチュア３の吸引部１６とコア２の吸引部１５とが互いに引き合い、吸引部１６と吸引部１５との間に吸引力が発生する。可動自在のアマチュア３がコア２に吸引される吸引力の向きは、アマチュア３がシャフト５の方向に駆動される向きと逆である。すなわち、アマチュア３には、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの負荷力が付与される。アマチュア３がシャフト５の方向に駆動される駆動力の向きは、アマチュア３のアマチュア延伸部１２からシャフト５の露出端部５ａへの向きであり、図１から図４における上向きである。アマチュア３に付与される負荷力の向きは、アマチュア３の吸引部１６からコア２の吸引部１５への向きであり、図１から図４における下向きである。 In the example shown in FIGS. 1 to 4, since the magnetic gap G 1 is smaller than the magnetic gap G 2, the magnetic resistance of the magnetic path M 1 becomes smaller than the magnetic resistance of the magnetic path M 2, and the coil current flows through the coil 4. The magnetic flux concentrates and passes through the magnetic path M1 having a small magnetic resistance. Since the current value is small at the initial stage of energization when current begins to flow through the coil 4, the magnetic flux mainly passes through the magnetic path M1. Since the magnetic flux M passes through the magnetic path M1, the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2 are magnetized in the same direction along the direction of the magnetic flux, so the attracting portion 16 of the amateur 3 and the core 2 Are attracted to each other, and a suction force is generated between the suction portion 16 and the suction portion 15. The direction of the suction force by which the movable armature 3 is attracted to the core 2 is opposite to the direction in which the armature 3 is driven in the direction of the shaft 5. That is, a load force opposite to the driving force that drives the armature 3 in the direction of the shaft 5 is applied to the armature 3. The direction of the driving force by which the amateur 3 is driven in the direction of the shaft 5 is the direction from the amateur extending portion 12 of the amateur 3 to the exposed end portion 5a of the shaft 5, and is upward in FIGS. The direction of the load force applied to the amateur 3 is the direction from the suction part 16 of the amateur 3 to the suction part 15 of the core 2 and is downward in FIGS. 1 to 4.
　コイル電流が増大すると、コイル４が発生する磁束は増大し、これに伴いアマチュア３がシャフト５の方向に駆動される駆動力及び、この駆動力と逆向きの負荷力も増大する。この際、吸引部１６の吸引部幅Ａ１及び吸引部１５の吸引部幅Ａ２は、アマチュア延伸部１２の外径よりも小さいので、吸引部１５、１６が磁気飽和すると吸引力も飽和し、駆動力の大きさが吸引力の大きさを超えると、アマチュア３は、吸引部１６がコア２の吸引部１５から離れる向き、図における上向きに移動する。アマチュア３が移動し、吸引部１５と吸引部１６との磁気ギャップが増大すると、吸引部１５と吸引部１６との間の吸引力は急激に小さくなる。なお、リンク機構２４に復帰ばねがある場合は、駆動力の大きさが吸引力と復帰ばねの引力との合力の大きさを超えると、アマチュア３は、吸引部１６がコア２の吸引部１５から離れる向き、図における上向きに移動する。 When the coil current increases, the magnetic flux generated by the coil 4 increases, and accordingly, the driving force for driving the armature 3 in the direction of the shaft 5 and the load force opposite to this driving force also increase. At this time, since the suction part width A1 of the suction part 16 and the suction part width A2 of the suction part 15 are smaller than the outer diameter of the armature extension part 12, when the suction parts 15 and 16 are magnetically saturated, the suction force is also saturated, and the driving force When the size of the armor exceeds the size of the suction force, the armature 3 moves in the direction in which the suction part 16 is separated from the suction part 15 of the core 2 and upward in the figure. When the amateur 3 moves and the magnetic gap between the suction part 15 and the suction part 16 increases, the attractive force between the suction part 15 and the suction part 16 decreases rapidly. In the case where the link mechanism 24 has a return spring, when the magnitude of the driving force exceeds the magnitude of the resultant force of the suction force and the attractive force of the return spring, the armature 3 has the suction portion 16 as the suction portion 15 of the core 2. Move away from, upward in the figure.
　磁路Ｍ１に磁束が集中し負荷力を付与する吸引部１５、１６が磁気飽和したとしても、磁束は磁路Ｍ２を通過することになり、駆動力が継続してアマチュア３に付与される。したがって、特許文献１の電磁アクチュエータと同様に、コイル４のコイル電流が十分増加した後にアマチュア３を第一状態から第二状態に動作させることが可能となり、大きな電流でアマチュア３を駆動でき、すなわちアマチュア３の駆動力を増加でき駆動特性を改善できる。 Even if the magnetic flux M concentrates on the magnetic path M1 and the attracting portions 15 and 16 that apply load force are magnetically saturated, the magnetic flux passes through the magnetic path M2, and the driving force is continuously applied to the amateur 3. Therefore, similarly to the electromagnetic actuator of Patent Document 1, it is possible to operate the armature 3 from the first state to the second state after the coil current of the coil 4 has sufficiently increased, and the armature 3 can be driven with a large current. The driving force of amateur 3 can be increased and the driving characteristics can be improved.
　電流遮断部２１の可動接点２２及び固定接点２３は互いに接触する閉路状態から、可動接点２２及び固定接点２３は互いに開離している開路状態に変化する、電磁アクチュエータ１の動作を説明する。例えば、図２で示す第二状態の電磁アクチュエータ１のコイル４に、シャフト５の露出端部５ａに向かって左向きに電流が流れると、コイル４の内部においてシャフト５の露出端部５ａからアマチュア延伸部１２の側に向かう磁束が発生する。アマチュア３は、この磁束によりシャフト５の露出端部５ａがコア２に近づくように駆動され、電磁アクチュエータ１は図１で示す第一状態に戻る。また、図１及図２のように、アマチュア３を重力と反対向きに駆動する場合は、第二状態を維持しているコイル４のコイル電流を遮断すると、アマチュア３の自重（あるいは復帰ばねとの合力）によって、電磁アクチュエータ１は図１で示す第一状態に戻るようにすることもできる。 The operation of the electromagnetic actuator 1 that changes from the closed state in which the movable contact 22 and the fixed contact 23 of the current interrupting unit 21 are in contact with each other to the open state in which the movable contact 22 and the fixed contact 23 are separated from each other will be described. For example, when a current flows to the left side of the coil 4 of the electromagnetic actuator 1 in the second state shown in FIG. 2 toward the exposed end portion 5 a of the shaft 5, the armature extends from the exposed end portion 5 a of the shaft 5 inside the coil 4. Magnetic flux toward the part 12 side is generated. The amateur 3 is driven by this magnetic flux so that the exposed end 5a of the shaft 5 approaches the core 2, and the electromagnetic actuator 1 returns to the first state shown in FIG. Further, as shown in FIGS. 1 and 2, when the armature 3 is driven in the direction opposite to the gravity, if the coil current of the coil 4 maintaining the second state is interrupted, the weight of the armature 3 (or the return spring and 1), the electromagnetic actuator 1 can be returned to the first state shown in FIG.
　実施の形態１の電磁アクチュエータ１は、コア２とアマチュア３との間にアマチュア３をシャフト５が送出される方向に駆動する駆動力を打ち消す方向に働く負荷力を付与する吸引部１５、１６がコア２の内側に形成されているので、この吸引部１５に相当する磁性支持板がコアの外部に露出して配置された特許文献１の電磁アクチュエータと異なり、コイル電流によって発生する磁束が磁路Ｍ１と磁路Ｍ２により確実に電磁アクチュエータ１の内部で閉じられる。このため、実施の形態１の電磁アクチュエータ１は、コア２とアマチュア３を通過する磁束、すなわち磁路Ｍ１、Ｍ２を通過する磁束は周辺の磁性体の有無に依らず、周辺機器に電磁アクチュエータ１から磁束が作用することもない。したがって、実施の形態１の電磁アクチュエータ１は、コイル電流によって発生する磁束が電磁アクチュエータ１の外部に漏れることで生じる負荷力の変動がなく、すなわち負荷力は一定になり、アマチュア３を確実に所定の位置まで動作できる。実施の形態１の電磁アクチュエータ１は、アマチュア３をシャフト５が送出される方向に駆動する駆動力を打ち消す方向に働く負荷力を一定にでき、かつコイル４のコイル電流が十分増加した後に大きな電流でアマチュア３を駆動できるので、アマチュア３の動作特性が安定するうえ、周辺機器に故障や誤動作が生じることもない。 In the electromagnetic actuator 1 according to the first embodiment, the suction portions 15 and 16 for applying a load force acting in a direction to cancel the driving force for driving the armature 3 in the direction in which the shaft 5 is sent between the core 2 and the armature 3 are provided. Unlike the electromagnetic actuator of Patent Document 1 in which the magnetic support plate corresponding to the attracting portion 15 is disposed outside the core because it is formed inside the core 2, the magnetic flux generated by the coil current is a magnetic path. The inside of the electromagnetic actuator 1 is reliably closed by M1 and the magnetic path M2. For this reason, the electromagnetic actuator 1 according to the first embodiment is configured such that the magnetic flux passing through the core 2 and the armature 3, that is, the magnetic flux passing through the magnetic paths M1 and M2, does not depend on the presence or absence of the surrounding magnetic body. Therefore, magnetic flux does not act. Therefore, the electromagnetic actuator 1 of the first embodiment is free from fluctuations in load force caused by leakage of magnetic flux generated by the coil current to the outside of the electromagnetic actuator 1, that is, the load force is constant and the armature 3 is reliably set to a predetermined value. It is possible to move to the position. The electromagnetic actuator 1 according to the first embodiment can maintain a constant load force acting in a direction to cancel the driving force for driving the armature 3 in the direction in which the shaft 5 is delivered, and a large current after the coil current of the coil 4 has sufficiently increased. Thus, the amateur 3 can be driven, so that the operating characteristics of the amateur 3 are stabilized and the peripheral device is not damaged or malfunctioned.
　また、実施の形態１の電磁アクチュエータ１は、吸引部１５、１６を別部品ではなく、コア２とアマチュア３の一部として形成しているので、組立誤差や寸法誤差などの集積誤差が小さくなるため、吸引部１５、１６の磁気ギャップＧ１および負荷力（吸引力）が発生する面積は安定し、電磁アクチュエータの動作ばらつきを低減できる。また、実施の形態１の電磁アクチュエータ１は、別部品が必要ないため、部品点数の削減による低コスト化及び小形化が可能となる。さらに、実施の形態１の電磁アクチュエータ１は、図３に示すアマチュア３の吸引部１６の吸引部幅Ａ１とコア２の吸引部１５の吸引部幅Ａ２を調整することで、負荷力（吸引力）が発生する面積が容易に変更可能なため、電磁アクチュエータ１の外形を大きくすることなく負荷力を自在に調整できる。吸引部幅Ａ１及び吸引部幅Ａ２を小さくする場合は、例えばアマチュア延伸部１２の外径及びコア開口端部９の開口１４の径を大きくするか、アマチュア根元部１１の外径を小さくすればよい。また、吸引部幅Ａ１及び吸引部幅Ａ２を大きくする場合は、例えばアマチュア延伸部１２の外径及びコア開口端部９の開口１４の径を小さくするか、アマチュア根元部１１の外径を大きくすればよい。 Further, in the electromagnetic actuator 1 according to the first embodiment, the suction portions 15 and 16 are not formed as separate parts but are formed as a part of the core 2 and the armature 3, so that integration errors such as assembly errors and dimensional errors are reduced. Therefore, the magnetic gap G1 of the attracting portions 15 and 16 and the area where the load force (attraction force) is generated are stable, and the operation variation of the electromagnetic actuator can be reduced. Further, since the electromagnetic actuator 1 according to the first embodiment does not require a separate part, the cost can be reduced and the size can be reduced by reducing the number of parts. Furthermore, the electromagnetic actuator 1 of Embodiment 1 adjusts the suction part width A1 of the suction part 16 of the armature 3 and the suction part width A2 of the suction part 15 of the core 2 shown in FIG. ) Can be easily changed, so that the load force can be freely adjusted without increasing the outer shape of the electromagnetic actuator 1. When reducing the suction part width A1 and the suction part width A2, for example, the outer diameter of the armature extension part 12 and the diameter of the opening 14 of the core opening end part 9 are increased, or the outer diameter of the amateur root part 11 is reduced. Good. Further, when the suction part width A1 and the suction part width A2 are increased, for example, the outer diameter of the armature extension part 12 and the diameter of the opening 14 of the core opening end part 9 are reduced, or the outer diameter of the amateur root part 11 is increased. do it.
　実施の形態１の電磁アクチュエータ１は、磁気ギャップＧ１が磁気ギャップＧ２より小さくなっているので、前述したように、磁路Ｍ１の磁気抵抗は磁路Ｍ２の磁気抵抗より小さくなり、コイル４にコイル電流が流れると、磁束は磁気抵抗が小さい磁路Ｍ１を集中して通過することになる。磁路Ｍ１におけるアマチュア３及びコア２の磁化が進み、磁路Ｍ１の磁気抵抗が上昇すると、磁束は磁路Ｍ１から磁路Ｍ２を通過する。アマチュア３、コア２の一方又は両方に寸法公差や設置誤差などのズレが生じた場合も、確実に小さな磁気ギャップＧ１が存在する磁路Ｍ１から優先して磁束を通過させることが可能となり、アマチュア３をシャフト５が送出される方向に駆動する駆動方向と逆向きの初期負荷力を安定でき、アマチュア３の動作ばらつきを低減できる。さらに、実施の形態１の電磁アクチュエータ１は、磁気ギャップＧ１及び磁気ギャップＧ２を調整することでも、磁路Ｍ１と磁路Ｍ２の磁気抵抗を変更できるため、電磁アクチュエータ１の外形を大きくすることなく、初期負荷力を自在に調整できる。 In the electromagnetic actuator 1 according to the first embodiment, the magnetic gap G1 is smaller than the magnetic gap G2. Therefore, as described above, the magnetic resistance of the magnetic path M1 is smaller than the magnetic resistance of the magnetic path M2, and the coil 4 is coiled. When a current flows, the magnetic flux concentrates and passes through the magnetic path M1 having a small magnetic resistance. When the magnetization of the armature 3 and the core 2 proceeds in the magnetic path M1 and the magnetic resistance of the magnetic path M1 increases, the magnetic flux passes from the magnetic path M1 to the magnetic path M2. Even when a deviation such as dimensional tolerance or installation error occurs in one or both of the amateur 3 and the core 2, it is possible to reliably pass the magnetic flux preferentially over the magnetic path M1 where the small magnetic gap G1 exists. The initial load force in the direction opposite to the driving direction in which the shaft 3 is driven in the direction in which the shaft 5 is delivered can be stabilized, and the operation variation of the amateur 3 can be reduced. Furthermore, the electromagnetic actuator 1 according to the first embodiment can change the magnetic resistance of the magnetic path M1 and the magnetic path M2 even by adjusting the magnetic gap G1 and the magnetic gap G2, so that the outer shape of the electromagnetic actuator 1 is not increased. The initial load force can be adjusted freely.
　実施の形態１の電磁アクチュエータ１は、アマチュア３の吸引部１６及びコア２の吸引部１５を通過する磁路Ｍ１の外側に、少なくとも１つ以上の磁路、すなわち１つの磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。 The electromagnetic actuator 1 according to the first embodiment forms at least one magnetic path, that is, one magnetic path M2 outside the magnetic path M1 passing through the attracting portion 16 of the armature 3 and the attracting portion 15 of the core 2. Therefore, it is possible to stabilize the initial load force in the opposite direction to the driving force that the armature 3 is driven in the direction of the shaft 5 regardless of the presence or absence of the surrounding magnetic material, and it is possible to cause failure or malfunction of the peripheral device. In addition to being able to prevent this, the cost can be reduced and the size can be reduced by reducing the number of parts.
　なお、ここでは、電磁アクチュエータ１は第一状態において、コア２の吸引部１５とアマチュア３の吸引部１６とが接触していない例を示したが、コア２の吸引部１５とアマチュア３の吸引部１６とが接触している場合も同様の効果を得ることができる。また、磁路Ｍ２の磁気ギャップが一定の例で説明したが、磁路Ｍ２の磁気ギャップは一定であることは必須ではない。例えば、アマチュア３の移動に伴って磁路Ｍ２の磁気ギャップが縮小してもよい。 Here, although the electromagnetic actuator 1 has shown the example in which the suction part 15 of the core 2 and the suction part 16 of the amateur 3 are not in contact in the first state, the suction part 15 of the core 2 and the suction of the amateur 3 are shown. The same effect can be obtained also when the part 16 is in contact. Moreover, although the magnetic gap of the magnetic path M2 has been described as an example, it is not essential that the magnetic gap of the magnetic path M2 is constant. For example, the magnetic gap of the magnetic path M2 may be reduced as the amateur 3 moves.
　以上のように、実施の形態１の電磁アクチュエータ１は、コイル４の内部に可動自在に配置された磁性体のアマチュア３を、コイル４により発生させた磁束により駆動する電磁アクチュエータである。実施の形態１の電磁アクチュエータ１は、コイル４と、根元部（アマチュア根元部１１）と、根元部（アマチュア根元部１１）からコイル４のコイル軸４ａの方向に延伸して設けられると共に根元部（アマチュア根元部１１）よりも外径の小さな延伸部（アマチュア延伸部１２）を有するアマチュア３と、コイル４の外側に配置されており、アマチュア３と共にコイル４により発生された磁束が通過する磁路を形成する磁性体のコア２と、を備える。実施の形態１の電磁アクチュエータ１のアマチュア３は、延伸部（アマチュア延伸部１２）の外周からコイル軸４ａに垂直な周方向に延伸した周方向拡張部１１ｂを有し、コア３は、アマチュア３の周方向拡張部１１ｂに対向して設けられると共に、磁束が通過することにより周方向拡張部１１ｂとの間に吸引力を発生させる吸引部１５、を当該コア３の内側に有し、吸引部１５を磁束が通過する第一の磁路Ｍ１の外側に、アマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成するアマチュア対向部（内周面９ａ）を有することを特徴とする。実施の形態１の電磁アクチュエータ１は、コア２の内側に設けられた吸引部１５を磁束が通過する第一の磁路Ｍ１と、第一の磁路Ｍ１の外側にアマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成するので、電磁アクチュエータ１の外部に磁束を漏らすことなく、アマチュア３を駆動する際に安定した初期負荷力をアマチュア３に付与することができる。 As described above, the electromagnetic actuator 1 according to the first embodiment is an electromagnetic actuator that drives the magnetic armature 3 movably disposed inside the coil 4 by the magnetic flux generated by the coil 4. The electromagnetic actuator 1 according to the first embodiment is provided with a coil 4, a root part (amateur root part 11), a base part (amateur root part 11) extending from the root part (amateur root part 11) in the direction of the coil shaft 4 a and a root part. An armature 3 having a stretched portion (amateur stretched portion 12) having an outer diameter smaller than that of the (amateur root portion 11), and a magnet that is disposed outside the coil 4 and through which the magnetic flux generated by the coil 4 along with the armature 3 passes. And a magnetic core 2 that forms a path. The armature 3 of the electromagnetic actuator 1 according to the first embodiment includes a circumferentially extending portion 11b that extends in the circumferential direction perpendicular to the coil shaft 4a from the outer periphery of the extending portion (the amateur extending portion 12). The suction portion 15 is provided on the inner side of the core 3 so as to generate an attractive force between the circumferential extension portion 11b and the circumferential extension portion 11b when the magnetic flux passes. 15 has an armature facing portion (inner peripheral surface 9a) that forms a second magnetic path M2 that faces the armature 3 and passes the magnetic flux outside the first magnetic path M1 through which the flux passes. To do. The electromagnetic actuator 1 according to the first embodiment includes a first magnetic path M1 through which a magnetic flux passes through an attractive portion 15 provided inside the core 2, and an armature 3 that faces the armature 3 outside the first magnetic path M1. The second magnetic path M2 through which the armature passes is formed, so that a stable initial load force can be applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1.
　実施の形態１の開閉装置５０は、内部に可動接点２２及び固定接点２３を有する電流遮断部２１と、電流遮断部２１の可動接点２２をリンク機構２４を介して、固定接点２３に接続するように移動させる電磁アクチュエータ１を備える。電磁アクチュエータ１は、コイル４と、根元部（アマチュア根元部１１）と、根元部（アマチュア根元部１１）からコイル４のコイル軸４ａの方向に延伸して設けられると共に根元部（アマチュア根元部１１）よりも外径の小さな延伸部（アマチュア延伸部１２）を有するアマチュア３と、コイル４の外側に配置されており、アマチュア３と共にコイル４により発生された磁束が通過する磁路を形成する磁性体のコア２と、を備える。電磁アクチュエータ１のアマチュア３は、延伸部（アマチュア延伸部１２）の外周からコイル軸４ａに垂直な周方向に延伸した周方向拡張部１１ｂを有し、コア３は、アマチュア３の周方向拡張部１１ｂに対向して設けられると共に、磁束が通過することにより周方向拡張部１１ｂとの間に吸引力を発生させる吸引部１５、を当該コア３の内側に有し、吸引部１５を磁束が通過する第一の磁路Ｍ１の外側に、アマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成するアマチュア対向部（内周面９ａ）を有することを特徴とする。実施の形態１の開閉装置５０は、コア２の内側に設けられた吸引部１５を磁束が通過する第一の磁路Ｍ１と、第一の磁路Ｍ１の外側にアマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成する電磁アクチュエータ１を備えるので、電磁アクチュエータ１の外部に磁束を漏らすことなく、アマチュア３を駆動する際に安定した初期負荷力をアマチュア３に付与することができ、電流遮断部２１を閉路状態にする閉路操作を確実に実行することができる。 The switching device 50 according to the first embodiment is configured to connect the current interrupting unit 21 having the movable contact 22 and the fixed contact 23 therein, and the movable contact 22 of the current interrupting unit 21 to the fixed contact 23 via the link mechanism 24. The electromagnetic actuator 1 to be moved is provided. The electromagnetic actuator 1 is provided to extend from the coil 4, the root portion (amateur root portion 11), the root portion (amateur root portion 11) to the coil axis 4 a of the coil 4, and the root portion (amateur root portion 11). The armature 3 having a stretched portion (amateur stretched portion 12) having a smaller outer diameter than the armature 3) and a magnetism that forms a magnetic path through which the magnetic flux generated by the coil 4 passes with the armature 3. A core 2 of the body. The armature 3 of the electromagnetic actuator 1 has a circumferentially extending portion 11b that extends in the circumferential direction perpendicular to the coil shaft 4a from the outer periphery of the extending portion (the amateur extending portion 12), and the core 3 is a circumferentially extending portion of the amateur 3 The suction portion 15 is provided on the inner side of the core 3 so as to generate a suction force with respect to the circumferential extension portion 11b when the magnetic flux passes and the magnetic flux passes through the suction portion 15. The armature facing part (inner peripheral surface 9a) which forms the 2nd magnetic path M2 which opposes the armature 3 and the magnetic flux passes outside of the 1st magnetic path M1 to perform is characterized by the above-mentioned. The opening / closing device 50 according to the first embodiment includes a first magnetic path M1 through which the magnetic flux passes through the attracting portion 15 provided inside the core 2, and the magnetic flux that faces the armature 3 outside the first magnetic path M1. Since the electromagnetic actuator 1 that forms the second magnetic path M2 through which the armature passes is provided, a stable initial load force is applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1. Thus, the closing operation for closing the current interrupting portion 21 can be reliably performed.
実施の形態２．
　図５は本発明の実施の形態２による電磁アクチュエータの概略断面図であり、図６は図５の電磁アクチュエータの要部を示す概略断面図である。図７は本発明の実施の形態２による他の電磁アクチュエータの概略断面図であり、図８は図７の電磁アクチュエータの要部を示す概略断面図である。図９は、本発明の実施の形態２による電磁アクチュエータの付与力の例を示す図である。図５から図８では、第一状態における電磁アクチュエータ１の構成を示している。図９では、初期負荷力が同じ場合における本実施の形態１の電磁アクチュエータ１の付与力と実施の形態１の電磁アクチュエータ１の付与力を比較している。実施の形態２の電磁アクチュエータ１は、吸引部１５、１６において、コア２あるいはアマチュア３の少なくとも一方を突起形状にし、吸引部１５、１６を磁束が通過する磁束通過面積Ｓ１を、磁路Ｍ１の外側に設けた磁路Ｍ２におけるコア２とアマチュア３間を磁束が通過する磁束通過面積Ｓ２より小さくしている例である。 Embodiment 2. FIG.
FIG. 5 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 2 of the present invention, and FIG. 6 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG. FIG. 7 is a schematic cross-sectional view of another electromagnetic actuator according to Embodiment 2 of the present invention, and FIG. 8 is a schematic cross-sectional view showing a main part of the electromagnetic actuator of FIG. FIG. 9 is a diagram illustrating an example of the applying force of the electromagnetic actuator according to the second embodiment of the present invention. 5 to 8 show the configuration of the electromagnetic actuator 1 in the first state. FIG. 9 compares the applying force of the electromagnetic actuator 1 of the first embodiment and the applying force of the electromagnetic actuator 1 of the first embodiment when the initial load force is the same. In the electromagnetic actuator 1 according to the second embodiment, at least one of the core 2 or the armature 3 is formed in a protruding shape in the attracting portions 15 and 16, and the magnetic flux passing area S1 through which the magnetic flux passes through the attracting portions 15 and 16 is defined as the magnetic path M1. In this example, the magnetic path M2 provided outside is smaller than the magnetic flux passage area S2 through which the magnetic flux passes between the core 2 and the armature 3.
　図５及び図６に示した電磁アクチュエータ１は、コア開口端部９の内側面９ｂに、吸引部１６の側に突出した突起部９ｃが設けられた例である。図７及び図８に示した電磁アクチュエータ１は、アマチュア根元部１１の周方向拡張部１１ｂに、吸引部１５の側に突出した突起部１１ｃが設けられた例である。 The electromagnetic actuator 1 shown in FIG. 5 and FIG. 6 is an example in which a protrusion 9 c that protrudes toward the suction portion 16 is provided on the inner side surface 9 b of the core opening end 9. The electromagnetic actuator 1 shown in FIGS. 7 and 8 is an example in which a protrusion 11 c that protrudes toward the suction portion 15 is provided on the circumferential extension portion 11 b of the amateur base portion 11.
　アマチュア３がシャフト５の方向に駆動される駆動方向と逆向きの初期負荷力の大きさは、吸引部１５、１６の磁束密度Ｂの２乗と吸引部１５、１６の磁束通過面積Ｓの積Ｂ２Ｓに比例する。ここで、後述するように、磁束通過面積Ｓを小さくしても初期負荷力の大きさの絶対値が同等にできる場合があるので、図９のアマチュア３に付与される付与力の特性では、初期負荷力が同等になる例を示した。図９において、縦軸はコイル電流又はアマチュア３に付与される付与力であり、横軸は時間である。特性３２は、コイル電流特性である。特性３３、３４は、それぞれ実施の形態１における付与力特性、実施の形態２における付与力特性である。 The magnitude of the initial load force in the direction opposite to the driving direction in which the amateur 3 is driven in the direction of the shaft 5 is the product of the square of the magnetic flux density B of the suction portions 15 and 16 and the magnetic flux passage area S of the suction portions 15 and 16. It is proportional to B 2 S. Here, as will be described later, even if the magnetic flux passage area S is reduced, the absolute value of the magnitude of the initial load force may be made equal, so the characteristics of the applied force applied to the amateur 3 in FIG. An example in which the initial load force is equivalent is shown. In FIG. 9, the vertical axis represents the coil current or the applied force applied to the amateur 3, and the horizontal axis represents time. A characteristic 32 is a coil current characteristic. Characteristics 33 and 34 are the imparting force characteristic in the first embodiment and the imparting force characteristic in the second embodiment, respectively.
　初期負荷力の大きさの最大値は、磁束が磁束Ｍ１のみに流れる場合である。コイル４に流れるコイル電流が同一であれば、コイル４が発生する磁束の強度も同じになるので、実施の形態１の吸引部幅Ａ２よりも実施の形態２の吸引部幅Ａ４が小さい場合は、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１が小さくなると共に、吸引部１５、１６を通過する磁束密度Ｂが増大する。したがって、コイル４に流れるコイル電流が同一の場合に、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を小さくしても、大きな磁束通過面積の吸引部１５、１６と同等の初期負荷力を得ることができる。 The maximum value of the initial load force is when the magnetic flux flows only in the magnetic flux M1. If the coil currents flowing in the coil 4 are the same, the intensity of the magnetic flux generated by the coil 4 is also the same. Therefore, when the suction part width A4 of the second embodiment is smaller than the suction part width A2 of the first embodiment, The magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16, is reduced, and the magnetic flux density B passing through the attracting portions 15 and 16 is increased. Therefore, when the coil currents flowing through the coil 4 are the same, even if the magnetic flux M1, that is, the magnetic flux passage area S1 passing through the suction portions 15 and 16 is reduced, the suction portions 15 and 16 having a large magnetic flux passage area An equivalent initial load force can be obtained.
　本実施の形態２では、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を減少させ、磁束密度Ｂを増加させることで、コイル電流が同じ場合における実施の形態１の電磁アクチュエータ１と同等の初期負荷力を発生させている。このため、本実施の形態２の電磁アクチュエータ１では、実施の形態１の電磁アクチュエータ１に比べて、アマチュア３の移動後における吸引部１５、１６の磁気ギャップ増加に伴う磁束密度Ｂの低下率が大きくなる。このため実施の形態１に比べて、実施の形態２の電磁アクチュエータ１は、初期負荷力における積Ｂ２Ｓの減少率が大きくなり、図９で示すように、アマチュア３に付与される付与力が正になっている力である、駆動力の増加率を大きくでき駆動特性を改善できる。なお、アマチュア３に付与される付与力が負になっている場合の付与力は、駆動力と逆向きの負荷力である。 In the second embodiment, the magnetic flux M1, that is, the magnetic flux passage area S1 that passes through the attracting portions 15 and 16 is decreased and the magnetic flux density B is increased, so that the coil current is the same as in the first embodiment. An initial load force equivalent to that of the electromagnetic actuator 1 is generated. For this reason, in the electromagnetic actuator 1 of the second embodiment, the rate of decrease of the magnetic flux density B accompanying the increase in the magnetic gap of the attracting portions 15 and 16 after the movement of the armature 3 is lower than that of the electromagnetic actuator 1 of the first embodiment. growing. Therefore, compared with the first embodiment, the electromagnetic actuator 1 according to the second embodiment has a larger reduction rate of the product B 2 S in the initial load force, and the applied force applied to the amateur 3 as shown in FIG. The increase rate of the driving force, which is a positive force, can be increased, and the driving characteristics can be improved. It should be noted that the applied force when the applied force applied to the amateur 3 is negative is a load force opposite to the driving force.
　磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を減少させ、磁束密度Ｂを増加させるには、吸引部幅Ａ３、Ａ４を小さくすればよいので、必ずしもコア開口端部９の内側面９ｂに、吸引部１６の側に突出した突起部９ｃを設けたり、アマチュア根元部１１の周方向拡張部１１ｂに、吸引部１５の側に突出した突起部１１ｃを設ける必要はない。しかし、突起部９ｃや突起部１１ｃを設けることで、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を、磁束が磁路Ｍ２を通過する磁束通過面積Ｓ２よりも減少させていることが容易にできる。磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を、磁束が磁路Ｍ２を通過する磁束通過面積Ｓ２よりも減少させていることで、磁路Ｍ２を通過する磁束が多くなり、図９の付与力特性３４のように、駆動力の増加率を大きくでき駆動特性を改善できる。 In order to decrease the magnetic flux passage area S1 through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16 and increase the magnetic flux density B, the attracting portion widths A3 and A4 may be reduced. It is not necessary to provide the protruding portion 9c protruding to the suction portion 16 side on the inner side surface 9b of 9 or the protruding portion 11c protruding to the suction portion 15 side on the circumferential extension portion 11b of the amateur root portion 11. . However, by providing the protrusion 9c and the protrusion 11c, the magnetic flux M1 passes through the magnetic path M1, that is, the magnetic flux passage area S1 through which the magnetic flux M passes through the magnetic path M2. Can be easily done. The magnetic flux passing through the magnetic path M2 is reduced by reducing the magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16, to the magnetic flux passing area S2 through which the magnetic flux passes through the magnetic path M2. As the applied force characteristic 34 in FIG. 9 increases, the increase rate of the driving force can be increased and the driving characteristic can be improved.
　図５及び図６の例では、図６に示すように、磁路Ｍ２を通過する磁束通過面積Ｓ２は、コア開口端部９の内周面９ａの幅である端部内周面幅Ｂ１と内周面９ａの周囲長との積である。これに対して、コア開口端部９の吸引部１５の周方向の幅である吸引部幅Ａ４は、実施の形態１の電磁アクチュエータ１の吸引部幅Ａ２と同一の場合は、磁路Ｍ１を通過する磁束通過面積Ｓ１は実施の形態１の電磁アクチュエータ１と同じである。このように、コア開口端部９の内側面９ｂに、吸引部１６の側に突出した突起部９ｃを設けることにより、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を、磁束が磁路Ｍ２を通過する磁束通過面積Ｓ２よりも減少させることができる。 In the example of FIGS. 5 and 6, as shown in FIG. 6, the magnetic flux passage area S <b> 2 that passes through the magnetic path M <b> 2 is equal to the inner peripheral surface width B <b> 1 that is the width of the inner peripheral surface 9 a of the core opening end portion 9. It is the product of the peripheral length of the peripheral surface 9a. On the other hand, when the suction part width A4, which is the circumferential width of the suction part 15 of the core opening end 9, is the same as the suction part width A2 of the electromagnetic actuator 1 of the first embodiment, the magnetic path M1 is changed. The passing magnetic flux passage area S1 is the same as that of the electromagnetic actuator 1 of the first embodiment. Thus, by providing the inner surface 9b of the core opening end 9 with the protrusion 9c protruding toward the suction portion 16, the magnetic flux passing area S1 through which the magnetic flux passes through the magnetic path M1, that is, the suction portions 15, 16 is provided. Can be made smaller than the magnetic flux passage area S2 through which the magnetic flux passes through the magnetic path M2.
　図７及び図８の例では、図８に示すように、磁路Ｍ２を通過する磁束通過面積Ｓ２は、コア開口端部９の内周面９ａの幅である端部内周面幅Ｂ１と内周面９ａの周囲長との積である。磁路Ｍ２を通過する磁束通過面積Ｓ２は、端部内周面幅Ｂ１が同一の場合には、実施の形態２の電磁アクチュエータ１も実施の形態１の電磁アクチュエータ１と同じである。これに対して、アマチュア根元部１１における周方向拡張部１１ｂの吸引部１６の周方向の幅である吸引部幅Ａ３は、突起部１１ｃを設けるので、同一径のアマチュア根元部１１を有する実施の形態１の電磁アクチュエータ１の吸引部幅Ａ２よりも小さくなる。したがって、磁路Ｍ１を通過する磁束通過面積Ｓ１は、実施の形態２の電磁アクチュエータ１は実施の形態１の電磁アクチュエータ１よりも小さい。このように、アマチュア根元部１１の周方向拡張部１１ｂに、吸引部１５の側に突出した突起部１１ｃを設けることにより、磁束が磁路Ｍ１、すなわち吸引部１５、１６を通過する磁束通過面積Ｓ１を、磁束が磁路Ｍ２を通過する磁束通過面積Ｓ２よりも減少させることができる。 In the example of FIGS. 7 and 8, as shown in FIG. 8, the magnetic flux passage area S2 passing through the magnetic path M2 is equal to the end inner peripheral surface width B1 which is the width of the inner peripheral surface 9a of the core opening end portion 9. It is the product of the peripheral length of the peripheral surface 9a. The magnetic flux passage area S2 passing through the magnetic path M2 is the same as the electromagnetic actuator 1 of the first embodiment in the electromagnetic actuator 1 of the second embodiment when the end inner peripheral surface width B1 is the same. On the other hand, the suction portion width A3, which is the width in the circumferential direction of the suction portion 16 of the circumferential extension portion 11b in the amateur root portion 11, is provided with the projection portion 11c, so that the armature root portion 11 having the same diameter is provided. It becomes smaller than the suction part width A2 of the electromagnetic actuator 1 of the first mode. Therefore, the magnetic flux passage area S1 passing through the magnetic path M1 is smaller in the electromagnetic actuator 1 of the second embodiment than in the electromagnetic actuator 1 of the first embodiment. Thus, by providing the protrusion 11c protruding toward the attracting portion 15 on the circumferentially extending portion 11b of the amateur root portion 11, the magnetic flux passage area through which the magnetic flux passes through the magnetic path M1, that is, the attracting portions 15 and 16 is provided. S1 can be made smaller than the magnetic flux passage area S2 where the magnetic flux passes through the magnetic path M2.
　また、本実施の形態２においても、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、実施の形態１と同様の効果が得られ、電磁アクチュエータ１の外部に磁束を漏らすことなく、シャフト５が送出される際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態２の電磁アクチュエータ１は、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。さらに、実施の形態１の図４で説明したように、磁気ギャップＧ１を磁気ギャップＧ２より小さくすることで、寸法公差や設置誤差によるアマチュア３の動作ばらつきを低減できるうえ、磁気ギャップＧ１及び磁気ギャップＧ２を調整することで、電磁アクチュエータ１を大形化することなく初期負荷力の調整が容易となる。 Also in the second embodiment, since at least one magnetic path M2 is formed outside the magnetic path M1 passing through the attracting portions 15 and 16, the same effect as in the first embodiment can be obtained. A stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1. Moreover, since the electromagnetic actuator 1 of Embodiment 2 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts. Miniaturization is possible. Furthermore, as described with reference to FIG. 4 of the first embodiment, by making the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap. By adjusting G2, the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
実施の形態３．
　図１０は本発明の実施の形態３による電磁アクチュエータの概略断面図であり、図１１は図１０の電磁アクチュエータの要部を示す概略断面図である。図１０及び図１１では、第一状態における電磁アクチュエータ１の構成を示している。実施の形態３の電磁アクチュエータ１は、吸引部１５、１６の吸引部幅Ａ１、Ａ２が一定となるように、アマチュア３あるいはコア２の突起部（突起部９ｃ、突起部１１ｃ）を集積公差Ｌ１以上、周方向の外側に移動させている例である。これにより、実施の形態３の電磁アクチュエータ１は、アマチュア３が設置誤差や寸法公差で図１０、図１１の紙面左右方向にずれたとしても、吸引部幅Ａ１、Ａ２を一定に保つことができるため、アマチュア３がシャフト５の方向に駆動される駆動力と逆方向の初期負荷力を一定に保つことが可能となり、アマチュア３の動作ばらつきを低減できる。 Embodiment 3 FIG.
FIG. 10 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 3 of the present invention, and FIG. 11 is a schematic cross-sectional view showing the main part of the electromagnetic actuator of FIG. 10 and 11 show the configuration of the electromagnetic actuator 1 in the first state. In the electromagnetic actuator 1 according to the third embodiment, the armature 3 or the projections of the core 2 (projection 9c, projection 11c) are integrated with a tolerance L1 so that the suction part widths A1 and A2 of the suction parts 15 and 16 are constant. The above is an example of moving the outer side in the circumferential direction. As a result, the electromagnetic actuator 1 according to the third embodiment can keep the suction section widths A1 and A2 constant even if the armature 3 is displaced in the horizontal direction in FIGS. 10 and 11 due to installation errors and dimensional tolerances. Therefore, it becomes possible to keep constant the initial load force in the direction opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and the operation variation of the armature 3 can be reduced.
　図１０及び図１１に示した電磁アクチュエータ１は、アマチュア根元部１１の周方向拡張部１１ｂに、吸引部１５の側に突出した突起部１１ｃが設けられた例である。なお、図では示さないが、コア開口端部９の内側面９ｂに、吸引部１６の側に突出した突起部９ｃが設けられた場合も、吸引部１５の内周側の端をコア開口端部９の内周面９ａから周方向の外側に移動させればよい。このようにすることで、コア開口端部９の内側面９ｂに、吸引部１６の側に突出した突起部９ｃが設けられた場合も、図１０及び図１１に示した電磁アクチュエータ１と同様に、アマチュア３が設置誤差や寸法公差で図１０、図１１の紙面左右方向にずれたとしても、吸引部幅Ａ１、Ａ２を一定に保つことができるため、アマチュア３がシャフト５の方向に駆動される駆動力と逆方向の初期負荷力を一定に保つことが可能となり、アマチュア３の動作ばらつきを低減できる。 The electromagnetic actuator 1 shown in FIG. 10 and FIG. 11 is an example in which a protrusion 11c that protrudes toward the suction portion 15 is provided on the circumferential extension 11b of the amateur base 11. Although not shown in the figure, even when the inner surface 9b of the core opening end portion 9 is provided with a protrusion 9c protruding toward the suction portion 16, the end on the inner peripheral side of the suction portion 15 is the core opening end. What is necessary is just to move to the outer side of the circumferential direction from the internal peripheral surface 9a of the part 9. FIG. By doing in this way, also when the projection part 9c which protruded in the suction part 16 side is provided in the inner surface 9b of the core opening end part 9, it is the same as that of the electromagnetic actuator 1 shown in FIG.10 and FIG.11. The armature 3 is driven in the direction of the shaft 5 because the suction section widths A1 and A2 can be kept constant even if the armature 3 is displaced in the horizontal direction of the paper in FIGS. Therefore, it is possible to keep the initial load force in the opposite direction to the driving force to be constant, and to reduce the operation variation of the amateur 3.
　また、本実施の形態３においても、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、実施の形態１と同様の効果が得られ、電磁アクチュエータ１の外部に磁束を漏らすことなく、シャフト５が送出される際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態３の電磁アクチュエータ１は、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。さらに、実施の形態１の図４で説明したように、磁気ギャップＧ１を磁気ギャップＧ２より小さくすることで、寸法公差や設置誤差によるアマチュア３の動作ばらつきを低減できるうえ、磁気ギャップＧ１及び磁気ギャップＧ２を調整することで、電磁アクチュエータ１を大形化することなく初期負荷力の調整が容易となる。 Also in the third embodiment, since at least one magnetic path M2 is formed outside the magnetic path M1 passing through the attracting portions 15 and 16, the same effect as in the first embodiment can be obtained. A stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1. Moreover, since the electromagnetic actuator 1 of Embodiment 3 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts. Miniaturization is possible. Furthermore, as described with reference to FIG. 4 of the first embodiment, by making the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap. By adjusting G2, the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
実施の形態４．
　図１２は本発明の実施の形態４による電磁アクチュエータの概略断面図であり、図１３は本発明の実施の形態４による他の電磁アクチュエータの概略断面図である。図１２及び図１３では、第一状態における電磁アクチュエータ１の構成を示している。実施の形態４の電磁アクチュエータ１は、吸引部１５と吸引部１６との間に非磁性材６ａを配置している例である。非磁性材６ａは吸引部１５または吸引部１６に固定されている。図１２及び図１３の電磁アクチュエータ１は、第一状態において、アマチュア３の周方向拡張部１１ｂとコア２におけるコア開口端部９の内側面９ｂとの間に非磁性材６ａが配置されている。図１２及び図１３の電磁アクチュエータ１は、第一状態において、アマチュア３の周方向拡張部１１ｂとコア２におけるコア開口端部９の内側面９ｂとの間に挿入された非磁性材６ａにより、アマチュア３の周方向拡張部１１ｂとコア２におけるコア開口端部９の内側面９ｂとの間の磁気ギャップを一定に保つことが可能となり、すなわち吸引部１５と吸引部１６との間の磁気ギャップを一定に保つことが可能となる。図１２及び図１３の電磁アクチュエータ１は、非磁性材６ａが第一状態における吸引部１５と吸引部１６との間の磁気ギャップを一定に保つので、アマチュア３をシャフト５が送出される方向に駆動する駆動力と逆向きの初期負荷力を一定に保つことが可能となり、アマチュア３の動作ばらつき、すなわち初期負荷力のばらつきを低減できる。 Embodiment 4 FIG.
FIG. 12 is a schematic sectional view of an electromagnetic actuator according to Embodiment 4 of the present invention, and FIG. 13 is a schematic sectional view of another electromagnetic actuator according to Embodiment 4 of the present invention. 12 and 13 show the configuration of the electromagnetic actuator 1 in the first state. The electromagnetic actuator 1 according to the fourth embodiment is an example in which a nonmagnetic material 6 a is disposed between the suction part 15 and the suction part 16. The nonmagnetic material 6 a is fixed to the suction part 15 or the suction part 16. 12 and 13, in the first state, the nonmagnetic material 6 a is disposed between the circumferentially extending portion 11 b of the armature 3 and the inner side surface 9 b of the core opening end portion 9 in the core 2. . In the first state, the electromagnetic actuator 1 of FIGS. 12 and 13 has a nonmagnetic material 6a inserted between the circumferentially extending portion 11b of the armature 3 and the inner surface 9b of the core opening end portion 9 of the core 2. It becomes possible to keep the magnetic gap between the circumferentially expanded portion 11b of the amateur 3 and the inner side surface 9b of the core opening end 9 in the core 2, that is, the magnetic gap between the attracting portion 15 and the attracting portion 16. Can be kept constant. The electromagnetic actuator 1 of FIGS. 12 and 13 keeps the armature 3 in the direction in which the shaft 5 is sent out, because the nonmagnetic material 6a keeps the magnetic gap between the suction part 15 and the suction part 16 in the first state constant. The initial load force in the direction opposite to the driving force to be driven can be kept constant, and the operation variation of the amateur 3, that is, the variation of the initial load force can be reduced.
　さらに図１３のように、吸引部１５と吸引部１６との間の磁気ギャップと異なる磁気ギャップ、すなわちコア２におけるコア開口端部９の内周面９ａとアマチュア３におけるアマチュア延伸部１２の外周面１２ａとの間の磁気ギャップに非磁性材６ｂを追加することで、非磁性材６ａによるアマチュア３の動作ばらつき低減効果に加えて、アマチュア３の回転や、アマチュア３の中心軸がコイル軸４ａからの周方向（紙面左右方向）にずれる軸ずれを防止できるため、さらに安定したアマチュア３の動作が可能となる。 Further, as shown in FIG. 13, a magnetic gap different from the magnetic gap between the attracting portion 15 and the attracting portion 16, that is, the inner peripheral surface 9 a of the core opening end 9 in the core 2 and the outer peripheral surface of the amateur extending portion 12 in the amateur 3. By adding the nonmagnetic material 6b to the magnetic gap between the armature 12a and the armature 3a, the rotation of the armature 3 and the central axis of the armature 3 are removed from the coil shaft 4a. Therefore, the armature 3 can be operated more stably.
　また、本実施の形態４においても、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、実施の形態１と同様の効果が得られ、電磁アクチュエータ１の外部に磁束を漏らすことなく、シャフト５が送出される際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態４の電磁アクチュエータ１は、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。さらに、実施の形態１の図４で説明したように、磁気ギャップＧ１を磁気ギャップＧ２より小さくすることで、寸法公差や設置誤差によるアマチュア３の動作ばらつきを低減できるうえ、磁気ギャップＧ１及び磁気ギャップＧ２を調整することで、電磁アクチュエータ１を大形化することなく初期負荷力の調整が容易となる。 Also in the fourth embodiment, since at least one magnetic path M2 is formed outside the magnetic path M1 passing through the attracting portions 15 and 16, the same effect as in the first embodiment can be obtained. A stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1. Moreover, since the electromagnetic actuator 1 of Embodiment 4 has at least one or more magnetic paths M2 formed outside the magnetic path M1 passing through the attracting portions 15 and 16, it does not depend on the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts. Miniaturization is possible. Furthermore, as described with reference to FIG. 4 of the first embodiment, by making the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap. By adjusting G2, the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
実施の形態５．
　図１４は本発明の実施の形態５による電磁アクチュエータの概略断面図であり、図１５は本発明の実施の形態５による他の電磁アクチュエータの概略断面図である。図１４及び図１５では、第一状態における電磁アクチュエータ１の構成を示している。実施の形態５の電磁アクチュエータ１は、吸引部１５、１６における互いに対向する対向面をアマチュア３の駆動方向、すなわちコイル軸４ａに対して角度を設けて配置している例である。吸引部１５、１６おける互いに対向する対向面がコイル軸４ａに対して傾斜している。なお、図１４及び図１５では、吸引部１５、１６おける互いに対向する対向面がコイル軸４ａに対して同じ角度で傾斜している例を示した。図１４では、吸引部１５、１６の対向面がコイル軸４ａに近づくにつれてシャフト５側に進むように傾斜している例を示した。図１５では、吸引部１５、１６の対向面がコイル軸４ａに近づくにつれてシャフト５の反対側、すなわちアマチュア延伸部１２側、開口１４側に進むように傾斜している例を示した。アマチュア３は、図２で示した第二状態から図１で示した第一状態に戻る際、アマチュア３の自重（あるいは復帰ばねとの合力）によって加速され、大きな速度が生じる。この結果、アマチュア３はアマチュア３に設けられた吸引部１６とコア２の吸引部１５との間で衝突と反発を繰り返し、図１で示した第一状態で静止する。これにより、アマチュア３の吸引部１６とコア２の吸引部１５には、大きな衝撃が数回加わり、吸引部１５、１６に変形が生じる原因となる。 Embodiment 5 FIG.
FIG. 14 is a schematic sectional view of an electromagnetic actuator according to Embodiment 5 of the present invention, and FIG. 15 is a schematic sectional view of another electromagnetic actuator according to Embodiment 5 of the present invention. 14 and 15 show the configuration of the electromagnetic actuator 1 in the first state. The electromagnetic actuator 1 according to the fifth embodiment is an example in which opposing surfaces of the suction portions 15 and 16 facing each other are arranged at an angle with respect to the driving direction of the armature 3, that is, the coil shaft 4a. Opposing surfaces of the suction portions 15 and 16 facing each other are inclined with respect to the coil shaft 4a. 14 and 15 show an example in which the opposing surfaces of the suction portions 15 and 16 facing each other are inclined at the same angle with respect to the coil shaft 4a. FIG. 14 shows an example in which the opposing surfaces of the suction portions 15 and 16 are inclined so as to advance toward the shaft 5 as they approach the coil shaft 4a. FIG. 15 shows an example in which the opposing surfaces of the suction portions 15 and 16 are inclined so as to advance toward the opposite side of the shaft 5, that is, toward the armature extension portion 12 side and the opening 14 side as approaching the coil shaft 4 a. When the amateur 3 returns from the second state shown in FIG. 2 to the first state shown in FIG. 1, the amateur 3 is accelerated by its own weight (or the resultant force with the return spring), and a large speed is generated. As a result, the armature 3 repeatedly collides and repels between the suction portion 16 provided on the armature 3 and the suction portion 15 of the core 2, and stops in the first state shown in FIG. Thereby, a large impact is applied several times to the suction part 16 of the amateur 3 and the suction part 15 of the core 2, causing deformation of the suction parts 15 and 16.
　本実施の形態５では、吸引部１５、１６をコイル軸４ａに垂直な面（水平面）に対して角度を設けて配置しているため、第一状態に戻る際の吸引部１５、１６に生じる衝撃が加わる方向をコイル軸４ａの方向以外、すなわち吸引部１５、１６の対向面に平行な方向にも分散することが可能となり、衝突と反発の回数を低減できるため、吸引部１５、１６に衝撃が加わる回数が少なくなり、吸引部１５、１６の変形が許容範囲を超えるまでの期間（変形寿命）を延ばすことができる。このため、実施の形態５の電磁アクチュエータ１は、吸引部１５、１６の変形寿命を延ばすことができるので、吸引部１５、１６の変形による、駆動方向と逆向きの初期負荷力の変動を抑制でき、アマチュア３の動作ばらつきを低減できると共に製品寿命を長くすることが可能となる。 In the fifth embodiment, the suction portions 15 and 16 are arranged at an angle with respect to a plane (horizontal plane) perpendicular to the coil axis 4a, and thus are generated in the suction portions 15 and 16 when returning to the first state. The direction in which the impact is applied can be dispersed in directions other than the direction of the coil shaft 4a, that is, in the direction parallel to the opposing surfaces of the suction portions 15 and 16, and the number of collisions and repulsions can be reduced. The number of times the impact is applied is reduced, and the period (deformation life) until the deformation of the suction portions 15 and 16 exceeds the allowable range can be extended. For this reason, since the electromagnetic actuator 1 according to the fifth embodiment can extend the deformation life of the suction portions 15 and 16, the variation of the initial load force in the direction opposite to the driving direction due to the deformation of the suction portions 15 and 16 is suppressed. It is possible to reduce the operational variation of the amateur 3, and to prolong the product life.
　また、コイル４に通電されないコイル無通電時に、アマチュア３は、アマチュア３の自重（あるいは復帰ばねとの合力）により、アマチュア３がシャフト５の方向に駆動される駆動方向と逆向きの負荷力が加わり、吸引部１５と吸引部１６とが互いに接触する。実施の形態５の電磁アクチュエータ１では、吸引部１５、１６を水平面に対して角度を設けて配置しているため、コイル無通電時であっても、アマチュア３の自重（あるいは復帰ばねの合力）により、アマチュア３の吸引部１６が対向するコア２の吸引部１５の傾斜に沿って接触するので、アマチュア３の中心軸がコイル軸４ａからの周方向（紙面左右方向）に軸ずれすることを防止できる。電磁アクチュエータ１は、コア２の貫通孔によりアマチュア３の中心軸とコイル軸４ａとが一致するように配置されているが、コイル無通電時にコア２とアマチュア３が接触した際に、アマチュア３の中心軸とコイル軸４ａがずれた場合には、コア２の貫通孔にコイル軸４ａに垂直な方向の力が働く。電磁アクチュエータ１の稼働により、この力が働く累積期間が長くなると、貫通孔にゆがみが生じる可能性もある。しかし、実施の形態５の電磁アクチュエータ１は、コイル無通電時であっても、アマチュア３の中心軸がコイル軸４ａからの周方向（紙面左右方向）に軸ずれすることを防止できるので、貫通孔のゆがみを防止でき、アマチュア３がシャフト５の方向に駆動される駆動方向と逆向きの初期負荷力のばらつきを低減でき、アマチュア３の動作ばらつきを低減できる。 When the coil 4 is not energized and the coil 4 is not energized, the armature 3 has a load force opposite to the driving direction in which the armature 3 is driven in the direction of the shaft 5 due to the weight of the armature 3 (or the resultant force with the return spring). In addition, the suction part 15 and the suction part 16 come into contact with each other. In the electromagnetic actuator 1 according to the fifth embodiment, the suction portions 15 and 16 are arranged at an angle with respect to the horizontal plane. Therefore, even when the coil is not energized, the weight of the amateur 3 (or the resultant force of the return spring) As a result, the suction part 16 of the armature 3 contacts along the inclination of the suction part 15 of the opposing core 2, so that the central axis of the armature 3 is displaced in the circumferential direction (left and right direction on the paper surface) from the coil shaft 4a. Can be prevented. The electromagnetic actuator 1 is arranged so that the central axis of the armature 3 and the coil axis 4a coincide with each other through the through-hole of the core 2. However, when the core 2 and the armature 3 come into contact with each other when the coil is not energized, When the center axis and the coil axis 4a are shifted, a force in a direction perpendicular to the coil axis 4a acts on the through hole of the core 2. If the cumulative period during which this force is applied becomes longer due to the operation of the electromagnetic actuator 1, the through hole may be distorted. However, the electromagnetic actuator 1 according to the fifth embodiment can prevent the center axis of the armature 3 from being displaced in the circumferential direction (left and right direction on the paper surface) from the coil shaft 4a even when the coil is not energized. The distortion of the hole can be prevented, the variation in the initial load force opposite to the driving direction in which the armature 3 is driven in the direction of the shaft 5 can be reduced, and the operation variation of the armature 3 can be reduced.
　また、本実施の形態５においても、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、実施の形態１と同様の効果が得られ、電磁アクチュエータ１の外部に磁束を漏らすことなく、シャフト５が送出される際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態５の電磁アクチュエータ１は、吸引部１５、１６を通過する磁路Ｍ１の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。さらに、実施の形態１の図４で説明したように、磁気ギャップＧ１を磁気ギャップＧ２より小さくすることで、寸法公差や設置誤差によるアマチュア３の動作ばらつきを低減できるうえ、磁気ギャップＧ１及び磁気ギャップＧ２を調整することで、電磁アクチュエータ１を大形化することなく初期負荷力の調整が容易となる。 Also in the fifth embodiment, since at least one magnetic path M2 is formed outside the magnetic path M1 passing through the attracting portions 15 and 16, the same effect as in the first embodiment can be obtained. A stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1. Further, in the electromagnetic actuator 1 according to the fifth embodiment, at least one or more magnetic paths M2 are formed outside the magnetic path M1 that passes through the attracting portions 15 and 16, and therefore, regardless of the presence or absence of the surrounding magnetic material. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts. Miniaturization is possible. Furthermore, as described with reference to FIG. 4 of the first embodiment, by making the magnetic gap G1 smaller than the magnetic gap G2, it is possible to reduce the operational variation of the armature 3 due to dimensional tolerances and installation errors, and to reduce the magnetic gap G1 and the magnetic gap. By adjusting G2, the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
実施の形態６．
　図１６は本発明の実施の形態６による電磁アクチュエータの概略断面図であり、図１７は本発明の実施の形態６による電磁アクチュエータのコイル電流の例を示す図である。図１６では、第一状態における電磁アクチュエータ１の構成を示している。図１７では、比較のために実施の形態１における電磁アクチュエータ１のコイル電流も記載した。実施の形態６の電磁アクチュエータ１は、吸引部１５、１６における互いに対向する対向面をコイルの駆動方向側、すなわちシャフト５側に設けている例である。実施の形態６のコア２は、コア胴体部７のコア蓋部８側においてコイル軸４ａ側に延伸して設けられたコア延長部１０を備えている。アマチュア根元部１１における周方向拡張部１１ｂの一部は、コア２のコア延長部１０におけるシャフト５側の面であるシャフト方向面１０ａの一部に対向している。周方向拡張部１１ｂとコア延長部１０のシャフト方向面１０ａとが対向する部分が吸引部１５、１６である。すなわち、コア２におけるコア延長部１０の吸引部１５と、アマチュア３における周方向拡張部１１ｂの吸引部１６は互いに対向している。コア蓋部８の内側面８ａは、アマチュア３に対向すると共にコイル４により発生された磁束が通過する磁路Ｍ２を形成するアマチュア対向部である。 Embodiment 6 FIG.
FIG. 16 is a schematic cross-sectional view of an electromagnetic actuator according to Embodiment 6 of the present invention, and FIG. 17 is a diagram showing an example of coil current of the electromagnetic actuator according to Embodiment 6 of the present invention. FIG. 16 shows the configuration of the electromagnetic actuator 1 in the first state. In FIG. 17, the coil current of the electromagnetic actuator 1 in Embodiment 1 is also shown for comparison. The electromagnetic actuator 1 according to the sixth embodiment is an example in which opposing surfaces of the suction portions 15 and 16 facing each other are provided on the coil driving direction side, that is, on the shaft 5 side. The core 2 according to the sixth embodiment includes a core extension portion 10 provided to extend toward the coil shaft 4 a side on the core lid portion 8 side of the core body portion 7. A part of the circumferentially extending portion 11 b in the amateur root portion 11 faces a portion of the shaft direction surface 10 a that is a surface on the shaft 5 side in the core extension portion 10 of the core 2. The portions where the circumferentially extending portion 11 b and the shaft direction surface 10 a of the core extending portion 10 face each other are suction portions 15 and 16. That is, the suction part 15 of the core extension part 10 in the core 2 and the suction part 16 of the circumferential extension part 11b in the armature 3 face each other. The inner side surface 8a of the core lid portion 8 is an amateur facing portion that forms a magnetic path M2 that faces the armature 3 and through which the magnetic flux generated by the coil 4 passes.
　コア２の吸引部１５は、コイル軸４ａ側（内周側）の端がコア延長部１０の内周面１０ｂであり、外周側の端がアマチュア３におけるアマチュア根元部１１の外周面１１ａからコイル軸４ａに平行に伸ばした破線３１が通過する位置である。アマチュア３の吸引部１６は、外周側の端がアマチュア根元部１１の外周面１１ａであり、コイル軸４ａ側（内周側）の端がコア２におけるコア延長部１０の内周面１０ｂからコイル軸４ａに平行に伸ばした破線３０が通過する位置である。図１６では、アマチュア３の吸引部１６とコア２の吸引部１５との隙間が磁気ギャップＧ１であり、アマチュア３におけるアマチュア延伸部１２の外周面１２ａと、コア２におけるコア開口端部９の内周面９ａとの隙間が磁気ギャップＧ２であり、アマチュア３のアマチュア根元部１１におけるシャフト５側の面であるシャフト方向面１１ｄとコア２におけるコア蓋部８の内側面８ａとの隙間が磁気ギャップＧ４である例を示した。磁気ギャップＧ１は、磁気ギャップＧ２及び磁気ギャップＧ４より小さくなっている。また、図１６では、電磁アクチュエータ１における磁気ギャップＧ２は第一状態及び第二状態で変化せず、第一状態における磁気ギャップＧ１が第二状態では増加し、第一状態における磁気ギャップＧ４が第二状態では減少する例を示した。 The suction portion 15 of the core 2 has a coil shaft 4 a side (inner peripheral side) end that is the inner peripheral surface 10 b of the core extension 10, and an outer peripheral end that is coiled from the outer peripheral surface 11 a of the amateur root portion 11 in the armature 3. This is a position through which a broken line 31 extending parallel to the axis 4a passes. The suction portion 16 of the amateur 3 has an outer peripheral end that is the outer peripheral surface 11a of the amateur base 11, and a coil shaft 4a side (inner peripheral side) end that is coiled from the inner peripheral surface 10b of the core extension 10 in the core 2. This is a position through which a broken line 30 extending parallel to the axis 4a passes. In FIG. 16, the gap between the attraction portion 16 of the armature 3 and the attraction portion 15 of the core 2 is a magnetic gap G1, and the outer peripheral surface 12a of the armature extension portion 12 in the armature 3 and the core opening end portion 9 in the core 2 The gap with the peripheral surface 9a is the magnetic gap G2, and the gap between the shaft direction surface 11d which is the surface on the shaft 5 side of the armature root portion 11 of the armature 3 and the inner surface 8a of the core lid portion 8 in the core 2 is the magnetic gap. An example of G4 is shown. The magnetic gap G1 is smaller than the magnetic gap G2 and the magnetic gap G4. In FIG. 16, the magnetic gap G2 in the electromagnetic actuator 1 does not change between the first state and the second state, the magnetic gap G1 in the first state increases in the second state, and the magnetic gap G4 in the first state becomes the first. An example of decrease in two states is shown.
　図１６に示すように、コイル４により発生された磁束は、コイル４の周りを通過する。実施の形態６の電磁アクチュエータ１におけるアマチュア３及びコア２を磁束が通過する経路、すなわち磁路は、２つの磁路Ｍ３と磁路Ｍ２が存在する。磁路Ｍ３はコイル４に近い側に形成された磁路であり、磁路Ｍ２は磁路Ｍ３よりも外側に形成された磁路である。コイル４により発生された磁束は駆動方向側に設けられた吸引部１５、１６を通る磁路Ｍ３と吸引部１５、１６を通らない磁路Ｍ２を通過する。 As shown in FIG. 16, the magnetic flux generated by the coil 4 passes around the coil 4. In the electromagnetic actuator 1 of the sixth embodiment, there are two magnetic paths M3 and M2 as paths through which the magnetic flux passes through the armature 3 and the core 2, that is, magnetic paths. The magnetic path M3 is a magnetic path formed on the side close to the coil 4, and the magnetic path M2 is a magnetic path formed outside the magnetic path M3. The magnetic flux generated by the coil 4 passes through a magnetic path M3 that passes through the attracting portions 15 and 16 provided on the driving direction side and a magnetic path M2 that does not pass through the attracting portions 15 and 16.
　実施の形態６の電磁アクチュエータ１では、磁路Ｍ３、磁路Ｍ２のいずれおいても磁束が磁気ギャップＧ２を通過するので、図１７に示すように、コイル４に通電するコイル電流の値を増やす必要がある。図１７の縦軸はコイル電流であり、横軸はアマチュア３が移動する長さであるストロークである。特性３７が実施の形態６の電磁アクチュエータ１におけるコイル電流特性であり、特性３６が実施の形態１の電磁アクチュエータ１におけるコイル電流特性である。Ｐ１は第一状態におけるアマチュア３の初期位置に対応するストロークであり、Ｐ２は第二状態におけるアマチュア３の位置に対応するストロークである。 In the electromagnetic actuator 1 according to the sixth embodiment, since the magnetic flux passes through the magnetic gap G2 in both the magnetic path M3 and the magnetic path M2, as shown in FIG. 17, the value of the coil current supplied to the coil 4 is increased. There is a need. The vertical axis in FIG. 17 is the coil current, and the horizontal axis is the stroke that is the length that the armature 3 moves. A characteristic 37 is a coil current characteristic in the electromagnetic actuator 1 of the sixth embodiment, and a characteristic 36 is a coil current characteristic in the electromagnetic actuator 1 of the first embodiment. P1 is a stroke corresponding to the initial position of the amateur 3 in the first state, and P2 is a stroke corresponding to the position of the amateur 3 in the second state.
　磁気ギャップＧ１が磁気ギャップＧ４より小さくなっているので、磁路Ｍ３の磁気抵抗は磁路Ｍ２の磁気抵抗より小さくなり、コイル４にコイル電流が流れると、磁束は磁気抵抗が小さい磁路Ｍ３を集中して通過することになる。コイル４に電流が流れ始めた通電初期は、電流値が小さいので、磁束は主に磁路Ｍ３を通過する。磁路Ｍ３を磁束が通過することで、アマチュア３の吸引部１６とコア２の吸引部１５は、共に磁束の向きに沿って同じ向きに磁化されるので、アマチュア３の吸引部１６とコア２の吸引部１５とが互いに引き合い、吸引部１６と吸引部１５との間に吸引力が発生する。可動自在のアマチュア３がコア２に吸引される吸引力の向きは、アマチュア３がシャフト５の方向に駆動される向きと逆である。すなわち、アマチュア３には、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの負荷力が付与される。アマチュア３がシャフト５の方向に駆動される駆動力の向きは、アマチュア３のアマチュア延伸部１２からシャフト５の露出端部５ａへの向きであり、図１６における上向きである。アマチュア３に付与される負荷力の向きは、アマチュア３の吸引部１６からコア２の吸引部１５への向きであり、図１６における下向きである。 Since the magnetic gap G1 is smaller than the magnetic gap G4, the magnetic resistance of the magnetic path M3 is smaller than the magnetic resistance of the magnetic path M2, and when a coil current flows through the coil 4, the magnetic flux passes through the magnetic path M3 having a small magnetic resistance. You will pass in a concentrated manner. Since the current value is small at the initial stage of energization when current begins to flow through the coil 4, the magnetic flux mainly passes through the magnetic path M3. Since the magnetic flux M passes through the magnetic path M3, the attracting portion 16 of the amateur 3 and the attracting portion 15 of the core 2 are both magnetized in the same direction along the direction of the magnetic flux. Are attracted to each other, and a suction force is generated between the suction portion 16 and the suction portion 15. The direction of the suction force by which the movable armature 3 is attracted to the core 2 is opposite to the direction in which the armature 3 is driven in the direction of the shaft 5. That is, a load force opposite to the driving force that drives the armature 3 in the direction of the shaft 5 is applied to the armature 3. The direction of the driving force by which the amateur 3 is driven in the direction of the shaft 5 is the direction from the amateur extending portion 12 of the amateur 3 to the exposed end portion 5a of the shaft 5, and is upward in FIG. The direction of the load force applied to the amateur 3 is the direction from the suction part 16 of the amateur 3 to the suction part 15 of the core 2, and is downward in FIG.
　コイル電流が増大すると、コイル４が発生する磁束は増大し、これに伴いアマチュア３がシャフト５の方向に駆動される駆動力及び、この駆動力と逆向きの負荷力も増大する。この際、吸引部１６、１５の吸引部幅は、アマチュア延伸部１２の外径よりも小さいので、吸引部１５、１６が磁気飽和すると吸引力も飽和し、駆動力の大きさが吸引力の大きさを超えると、アマチュア３は、吸引部１６がコア２の吸引部１５から離れる向き、図における上向きに移動する。アマチュア３が移動し、吸引部１５と吸引部１６との磁気ギャップが増大すると、吸引部１５と吸引部１６との間の吸引力は急激に小さくなる。なお、リンク機構２４に復帰ばねがある場合は、駆動力の大きさが吸引力と復帰ばねの引力との合力の大きさを超えると、アマチュア３は、吸引部１６がコア２の吸引部１５から離れる向き、図における上向きに移動する。 When the coil current increases, the magnetic flux generated by the coil 4 increases, and accordingly, the driving force for driving the armature 3 in the direction of the shaft 5 and the load force opposite to this driving force also increase. At this time, since the suction part width of the suction parts 16 and 15 is smaller than the outer diameter of the armature extension part 12, when the suction parts 15 and 16 are magnetically saturated, the suction force is saturated, and the magnitude of the driving force is the magnitude of the suction force. Beyond that, the armature 3 moves upward in the direction in which the suction part 16 moves away from the suction part 15 of the core 2. When the amateur 3 moves and the magnetic gap between the suction part 15 and the suction part 16 increases, the attractive force between the suction part 15 and the suction part 16 decreases rapidly. In the case where the link mechanism 24 has a return spring, when the magnitude of the driving force exceeds the magnitude of the resultant force of the suction force and the attractive force of the return spring, the armature 3 has the suction portion 16 as the suction portion 15 of the core 2. Move away from, upward in the figure.
　実施の形態６の電磁アクチュエータ１は、実施の形態１の電磁アクチュエータ１と同様に、コイル４の近くに形成される磁路Ｍ３に磁束が集中し負荷力を付与する吸引部１５、１６が磁気飽和したとしても、磁束は磁路Ｍ２を通過することになり、駆動力が継続してアマチュア３に付与される。したがって、実施の形態６の電磁アクチュエータ１は、実施の形態１の電磁アクチュエータ１と同様に、コイル４のコイル電流が十分増加した後にアマチュア３を第一状態から第二状態に動作させることが可能となり、大きな電流でアマチュア３を駆動でき、すなわちアマチュア３の駆動力を増加でき駆動特性を改善できる。 As in the electromagnetic actuator 1 of the first embodiment, the electromagnetic actuator 1 of the sixth embodiment has magnetic attraction portions 15 and 16 that apply a load force by concentrating magnetic flux on the magnetic path M3 formed near the coil 4. Even if it is saturated, the magnetic flux passes through the magnetic path M2, and the driving force is continuously applied to the amateur 3. Therefore, similarly to the electromagnetic actuator 1 of the first embodiment, the electromagnetic actuator 1 of the sixth embodiment can operate the armature 3 from the first state to the second state after the coil current of the coil 4 has sufficiently increased. Thus, the armature 3 can be driven with a large current, that is, the driving force of the armature 3 can be increased and the driving characteristics can be improved.
　また、実施の形態６の電磁アクチュエータ１は、吸引部１６と吸引部１５との間の磁気ギャップＧ１を実施の形態１における吸引部１６と吸引部１５との間の磁気ギャップよりも小さくすることで、磁路Ｍ３は実施の形態１における磁路Ｍ１より磁気抵抗が小さくなり、実施の形態１の電磁アクチュエータ１よりもアマチュア３内、すなわちアマチュア延伸部１２及びアマチュア根元部１１内を通過する磁束が増加する。電源電圧に対するコイル４の逆電圧はアマチュア３内を通過する磁束の時間変化に比例するため、図１６に示す構成のように、アマチュア３を初期位置（第一状態の位置）でより磁化させたほうがコイル４の逆電圧を低減でき、コイル電流の低下を防止できる。実施の形態６の電磁アクチュエータ１は、吸引部１６と吸引部１５との間の磁気ギャップＧ１を小さくすることで、アマチュア３をシャフト５が送出される方向に駆動する駆動力を増加することが可能となり、アマチュア３の駆動特性を改善できる。なお、他の実施の形態で示した電磁アクチュエータ１でも、吸引部１６と吸引部１５との間の磁気ギャップＧ１を小さくすることで、アマチュア３をシャフト５が送出される方向に駆動する駆動力を増加することが可能となり、アマチュア３の駆動特性を改善できる。 Further, in the electromagnetic actuator 1 according to the sixth embodiment, the magnetic gap G1 between the suction portion 16 and the suction portion 15 is made smaller than the magnetic gap between the suction portion 16 and the suction portion 15 in the first embodiment. Thus, magnetic resistance of the magnetic path M3 is smaller than that of the magnetic path M1 in the first embodiment, and the magnetic flux passes through the armature 3, that is, the armature extending portion 12 and the armature root portion 11, as compared with the electromagnetic actuator 1 of the first embodiment. Will increase. Since the reverse voltage of the coil 4 with respect to the power supply voltage is proportional to the time change of the magnetic flux passing through the armature 3, the armature 3 is more magnetized at the initial position (first state position) as shown in FIG. This can reduce the reverse voltage of the coil 4 and prevent the coil current from decreasing. The electromagnetic actuator 1 of the sixth embodiment can increase the driving force for driving the armature 3 in the direction in which the shaft 5 is sent out by reducing the magnetic gap G1 between the attraction unit 16 and the attraction unit 15. The driving characteristics of the amateur 3 can be improved. In the electromagnetic actuator 1 shown in the other embodiments, the driving force for driving the armature 3 in the direction in which the shaft 5 is sent out by reducing the magnetic gap G1 between the attraction unit 16 and the attraction unit 15. The driving characteristics of the amateur 3 can be improved.
　また、本実施の形態６においても、吸引部１５、１６を通過する磁路Ｍ３の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、実施の形態１と同様の効果が得られ、電磁アクチュエータ１の外部に磁束を漏らすことなく、シャフト５が送出される際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態６の電磁アクチュエータ１は、吸引部１５、１６を通過する磁路Ｍ３の外側に少なくとも１つ以上の磁路Ｍ２を形成しているため、周辺の磁性体の有無に依らず、アマチュア３がシャフト５の方向に駆動される駆動力と逆向きの初期負荷力を安定させることが可能であり、周辺機器の故障や誤動作を防止できるうえ、部品点数の削減による低コスト化及び小形化が可能となる。さらに、磁気ギャップＧ１を磁気ギャップＧ２及び磁気ギャップＧ４より小さくすることで、実施の形態１の図４で説明したのと同様に、寸法公差や設置誤差による動作ばらつきを低減できるうえ、磁気ギャップＧ１と磁気ギャップＧ２及び磁気ギャップＧ４を調整することで、電磁アクチュエータ１を大形化することなく初期負荷力の調整が容易となる。 Also in the sixth embodiment, since at least one magnetic path M2 is formed outside the magnetic path M3 passing through the attracting portions 15 and 16, the same effect as in the first embodiment is obtained. A stable initial load force can be applied to the armature 3 when the shaft 5 is delivered without leaking the magnetic flux outside the electromagnetic actuator 1. Further, in the electromagnetic actuator 1 according to the sixth embodiment, since at least one magnetic path M2 is formed outside the magnetic path M3 passing through the attracting portions 15 and 16, regardless of the presence or absence of a surrounding magnetic body. It is possible to stabilize the initial load force that is opposite to the driving force in which the armature 3 is driven in the direction of the shaft 5, and it is possible to prevent peripheral devices from malfunctioning or malfunctioning, and to reduce the cost by reducing the number of parts. Miniaturization is possible. Further, by making the magnetic gap G1 smaller than the magnetic gap G2 and the magnetic gap G4, as described with reference to FIG. 4 of the first embodiment, it is possible to reduce variation in operation due to dimensional tolerances and installation errors and to reduce the magnetic gap G1. By adjusting the magnetic gap G2 and the magnetic gap G4, the initial load force can be easily adjusted without increasing the size of the electromagnetic actuator 1.
　なお、ここでは、電磁アクチュエータ１は第一状態において、コア２の吸引部１５とアマチュア３の吸引部１６とが接触していない例を示したが、コア２の吸引部１５とアマチュア３の吸引部１６とが接触している場合も同様の効果を得ることができる。また、磁路Ｍ２の磁気ギャップが一定の例で説明したが、磁路Ｍ２の磁気ギャップは一定であることは必須ではない。例えば、アマチュア３の移動に伴って磁路Ｍ２の磁気ギャップが縮小してもよい。 Here, although the electromagnetic actuator 1 has shown the example in which the suction part 15 of the core 2 and the suction part 16 of the amateur 3 are not in contact in the first state, the suction part 15 of the core 2 and the suction of the amateur 3 are shown. The same effect can be obtained also when the part 16 is in contact. Moreover, although the magnetic gap of the magnetic path M2 has been described as an example, it is not essential that the magnetic gap of the magnetic path M2 is constant. For example, the magnetic gap of the magnetic path M2 may be reduced as the amateur 3 moves.
実施の形態７．
　図１８及び図１９は、実施の形態７における電磁アクチュエータ及び開閉装置を示す図である。図１８は電磁アクチュエータの第一状態及び開極状態（ＯＦＦ状態）を示しており、図１９は電磁アクチュエータの第二状態及び閉極状態（ＯＮ状態）を示している。図２０は、本発明の実施の形態７による第一の電磁アクチュエータの部分図である。図２１は図２０のコア及びアマチュアの部分図であり、図２２は図２０の緩衝材の図である。図２０は、開極途中のコア２とアマチュア３の一部を示した図である。実施の形態７の電磁アクチュエータ１は、開極衝撃が印加されるコア２の吸引部１５に、少なくとも一部がアマチュア３における周方向拡張部１１ｂの吸引部１６とコア２の吸引部１５との間に介在するように、図２２に示す緩衝材４１が配置され、開極衝撃を緩衝材に印加する構成にしている。開極衝撃は、実施の形態４で説明したように、電磁アクチュエータ１が第二状態（図１９参照）から第一状態（図１８参照）に戻る際に、アマチュア３とコア２が衝突することで生じる衝撃である。なお、図２０、図２１ではコア２の吸引部１５において緩衝材４１が配置するための凹部が形成されている。アマチュア３における周方向拡張部１１ｂと対向するコア２の部分が吸引部１５なので、緩衝材４１のコイル軸４ａ側の部分は、アマチュア３の吸引部１６とコア２の吸引部１５との間に介在するように配置された緩衝材４１の部分である。図１８及び図１９において、電磁アクチュエータ１及び電流遮断部２１の断面図を示しているが、引き出し線等が見えにくくならないように、断面においてハッチングを省略した。また、図１８及び図１９において、左右のコイル４の断面から紙面奥側に本来見える外周線（シャフト５の移動方向に垂直な方向の外周線）も、引き出し線等が見えにくくならないように、省略した。 Embodiment 7 FIG.
18 and 19 are diagrams showing an electromagnetic actuator and a switching device according to the seventh embodiment. FIG. 18 shows a first state and an open state (OFF state) of the electromagnetic actuator, and FIG. 19 shows a second state and a closed state (ON state) of the electromagnetic actuator. FIG. 20 is a partial view of the first electromagnetic actuator according to the seventh embodiment of the present invention. FIG. 21 is a partial view of the core and amateur of FIG. 20, and FIG. 22 is a view of the cushioning material of FIG. FIG. 20 is a view showing a part of the core 2 and the amateur 3 in the middle of the opening. In the electromagnetic actuator 1 according to the seventh embodiment, at least a portion of the suction portion 16 of the circumferential extension portion 11b in the armature 3 and the suction portion 15 of the core 2 are connected to the suction portion 15 of the core 2 to which the opening impact is applied. A cushioning material 41 shown in FIG. 22 is disposed so as to be interposed therebetween, and an opening impact is applied to the cushioning material. As described in the fourth embodiment, the opening impact is caused when the armature 3 and the core 2 collide when the electromagnetic actuator 1 returns from the second state (see FIG. 19) to the first state (see FIG. 18). It is an impact caused by. 20 and 21, a recess for arranging the buffer material 41 is formed in the suction portion 15 of the core 2. Since the portion of the core 2 facing the circumferentially extending portion 11 b in the amateur 3 is the suction portion 15, the portion on the coil shaft 4 a side of the cushioning material 41 is between the suction portion 16 of the amateur 3 and the suction portion 15 of the core 2. It is a part of the buffer material 41 arrange | positioned so that it may interpose. 18 and 19, cross-sectional views of the electromagnetic actuator 1 and the current interrupting unit 21 are shown, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like. Further, in FIGS. 18 and 19, an outer peripheral line (peripheral line in a direction perpendicular to the moving direction of the shaft 5) that is originally visible from the cross section of the left and right coils 4 does not become difficult to see a lead line or the like. Omitted.
　開閉装置は一般的に、開放バネ等の蓄勢力を利用して閉極状態（ＯＮ状態）から開極状態（ＯＦＦ状態）に切り替える。その際に、開極衝撃は逆向きの初期負荷力を与えるコア２の吸引部１５とアマチュア３の吸引部１６に印加されるため、開閉装置の多頻度開閉に伴い剛性の小さいコア２の吸引部１５が塑性変形する場合がある。この塑性変形が発生した場合には、この塑性変形に伴い初期負荷力がバラつき、電磁アクチュエータの駆動特性は悪化する。なお、図２０、図２１ではコア２とアマチュア３が角柱の場合を例として挙げているが、円柱の場合も同様である。 The switchgear is generally switched from a closed state (ON state) to an open state (OFF state) using a stored energy such as an open spring. At that time, the opening impact is applied to the suction portion 15 of the core 2 and the suction portion 16 of the armature 3 which give the initial load force in the opposite direction. The part 15 may be plastically deformed. When this plastic deformation occurs, the initial load force varies with this plastic deformation, and the drive characteristics of the electromagnetic actuator deteriorate. 20 and 21 exemplify the case where the core 2 and the armature 3 are prisms, the same applies to the case of a cylinder.
　実施の形態７の第一の電磁アクチュエータ１は、図２０に示すように、開極衝撃が印加されるコア２の吸引部１５に緩衝材４１を配置し、開極衝撃を緩衝材に印加する構成にしている。これにより、実施の形態７の第一の電磁アクチュエータ１は、逆向きの初期負荷力を与えるコア２の吸引部１５の塑性変形を防止でき、初期負荷力のバラつきを抑制できるため、電磁アクチュエータの駆動特性は悪化することはない。緩衝材４１としては、塑性変形しにくい比較的剛性の大きいステンレスなどの非磁性金属や、衝撃を吸収できるゴムや樹脂などの弾性部材を用いることができる。なお、コア２における緩衝材４１の配置方法としては、図２３の場合も考えられる。 As shown in FIG. 20, the first electromagnetic actuator 1 according to the seventh embodiment arranges the buffer material 41 in the suction portion 15 of the core 2 to which the opening shock is applied, and applies the opening shock to the buffer material. It has a configuration. As a result, the first electromagnetic actuator 1 according to the seventh embodiment can prevent plastic deformation of the suction portion 15 of the core 2 that gives an initial load force in the opposite direction, and can suppress variations in the initial load force. The drive characteristics do not deteriorate. As the buffer material 41, a non-magnetic metal such as stainless steel that is relatively hard to be plastically deformed or an elastic member such as rubber or resin that can absorb an impact can be used. In addition, as a method of arranging the buffer material 41 in the core 2, the case of FIG.
　図２３は本発明の実施の形態７による第二の電磁アクチュエータの部分図であり、図２４は図２３の緩衝材の図である。図２３に示した実施の形態７の第二の電磁アクチュエータ１は、図２０に示した実施の形態７の第一の電磁アクチュエータ１よりもコア２の吸引部１５の面積を小さくした例である。 FIG. 23 is a partial view of a second electromagnetic actuator according to the seventh embodiment of the present invention, and FIG. 24 is a view of the cushioning material of FIG. The second electromagnetic actuator 1 of the seventh embodiment shown in FIG. 23 is an example in which the area of the suction portion 15 of the core 2 is made smaller than that of the first electromagnetic actuator 1 of the seventh embodiment shown in FIG. .
　また、緩衝材４１の厚みを変更することで、逆向きの初期負荷力を与えるコア２の吸引部１５、アマチュア３の吸引部１６の磁気ギャップを調整でき、逆向きの初期負荷力の大きさを容易に調整できる。したがって、部品バラつきや組立バラつきに応じて変化する電磁アクチュエータ１の駆動特性を、緩衝材４１の厚み変更により逆向きの初期負荷力を調整することで、安定させることが可能となる。 In addition, by changing the thickness of the buffer material 41, the magnetic gap between the attracting portion 15 of the core 2 and the attracting portion 16 of the amateur 3 that gives an initial load force in the opposite direction can be adjusted, and the magnitude of the reverse initial load force can be adjusted. Can be adjusted easily. Therefore, it is possible to stabilize the drive characteristics of the electromagnetic actuator 1 that change in accordance with component variations and assembly variations by adjusting the initial load force in the opposite direction by changing the thickness of the buffer material 41.
　なお、図２０及び図２３では、緩衝材４１をコア２の側に配置したが、図２５及び図２７のようにアマチュア３の側に配置してもよい。図２５は本発明の実施の形態７による第三の電磁アクチュエータの部分図であり、図２６は図２５の緩衝材を示す図である。図２７は本発明の実施の形態７による第四の電磁アクチュエータの部分図であり、図２８は図２７の緩衝材の図である。図２５、図２７に示した実施の形態７の電磁アクチュエータ１は、開極衝撃が印加されるアマチュア３の吸引部１６に、少なくとも一部がアマチュア３における周方向拡張部１１ｂの吸引部１６とコア２の吸引部１５との間に介在するように、緩衝材４１が配置され、開極衝撃を緩衝材に印加する構成にしている。図２５、図２７ではアマチュア３の吸引部１６において緩衝材４１が配置するための凹部が形成されている。コア２と対向するアマチュア３における周方向拡張部１１ｂの部分が吸引部１６なので、緩衝材４１のコイル軸４ａと反対側の部分（外周側の部分）は、アマチュア３の吸引部１６とコア２の吸引部１５との間に介在するように配置された緩衝材４１の部分である。 20 and 23, the cushioning material 41 is disposed on the core 2 side, but may be disposed on the amateur 3 side as illustrated in FIGS. 25 and 27. FIG. 25 is a partial view of a third electromagnetic actuator according to Embodiment 7 of the present invention, and FIG. 26 is a view showing the cushioning material of FIG. 27 is a partial view of a fourth electromagnetic actuator according to the seventh embodiment of the present invention, and FIG. 28 is a view of the cushioning material of FIG. The electromagnetic actuator 1 according to the seventh embodiment shown in FIGS. 25 and 27 includes at least a part of the suction part 16 of the circumferential extension 11b in the amateur 3 and the suction part 16 of the amateur 3 to which the opening impact is applied. A buffer material 41 is arranged so as to be interposed between the suction portion 15 of the core 2 and a contact opening shock is applied to the buffer material. In FIG. 25 and FIG. 27, the recessed part for arrange | positioning the shock absorbing material 41 in the attraction | suction part 16 of the amateur 3 is formed. Since the portion of the circumferentially extending portion 11b in the armature 3 facing the core 2 is the suction portion 16, the portion of the cushioning material 41 opposite to the coil shaft 4a (portion on the outer peripheral side) is the suction portion 16 of the armature 3 and the core 2 It is a part of the buffer material 41 arrange | positioned so that it may interpose between the suction parts 15 of this.
　実施の形態７の電磁アクチュエータ１は、コア２の内側に設けられた吸引部１５を磁束が通過する第一の磁路Ｍ１と、第一の磁路Ｍ１の外側にアマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成するので、電磁アクチュエータ１の外部に磁束を漏らすことなく、アマチュア３を駆動する際に安定した初期負荷力をアマチュア３に付与することができる。また、実施の形態７の電磁アクチュエータ１は、コア２の吸引部１５の間又はアマチュア３の吸引部１６に緩衝材４１を備えたので、コア２の吸引部１５の剛性が小さい場合でもコア２の吸引部１５の塑性変形を防止でき、初期負荷力のバラつきを抑制できる。このため、実施の形態７の電磁アクチュエータ１は、電磁アクチュエータの駆動特性を良好のまま維持することができる。すなわち、実施の形態７の電磁アクチュエータ１は、製品寿命を長くすることが可能となる。 The electromagnetic actuator 1 according to the seventh embodiment includes a first magnetic path M1 through which a magnetic flux passes through an attracting portion 15 provided inside the core 2, and an armature 3 on the outside of the first magnetic path M1 and a magnetic flux. The second magnetic path M2 through which the armature passes is formed, so that a stable initial load force can be applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1. Moreover, since the electromagnetic actuator 1 according to the seventh embodiment includes the buffer material 41 between the suction portions 15 of the core 2 or the suction portion 16 of the armature 3, even if the rigidity of the suction portion 15 of the core 2 is small, the core 2. The plastic deformation of the suction portion 15 can be prevented, and variations in the initial load force can be suppressed. For this reason, the electromagnetic actuator 1 of Embodiment 7 can maintain the drive characteristic of an electromagnetic actuator with favorable. That is, the electromagnetic actuator 1 of Embodiment 7 can extend the product life.
　実施の形態７の開閉装置５０は、コア２の内側に設けられた吸引部１５を磁束が通過する第一の磁路Ｍ１と、第一の磁路Ｍ１の外側にアマチュア３に対向すると共に磁束が通過する第二の磁路Ｍ２を形成する電磁アクチュエータ１を備えるので、電磁アクチュエータ１の外部に磁束を漏らすことなく、アマチュア３を駆動する際に安定した初期負荷力をアマチュア３に付与することができ、電流遮断部２１を閉路状態にする閉路操作を確実に実行することができる。また、実施の形態７の開閉装置５０は、電磁アクチュエータ１における、コア２の吸引部１５の間又はアマチュア３の吸引部１６の間に緩衝材４１を備えたので、コア２の吸引部１５の剛性が小さい場合でもコア２の吸引部１５の塑性変形を防止でき、初期負荷力のバラつきを抑制できる。このため、実施の形態７の開閉装置５０は、電磁アクチュエータの駆動特性を良好のまま維持することができ、電流遮断部２１を閉路状態にする閉路操作を長期間確実に実行することができる。 The opening / closing device 50 according to the seventh embodiment includes a first magnetic path M1 through which the magnetic flux passes through the attracting portion 15 provided inside the core 2, and an armature 3 that faces the armature 3 outside the first magnetic path M1. Since the electromagnetic actuator 1 that forms the second magnetic path M2 through which the armature passes is provided, a stable initial load force is applied to the armature 3 when the armature 3 is driven without leaking the magnetic flux outside the electromagnetic actuator 1. Thus, the closing operation for closing the current interrupting portion 21 can be reliably performed. In addition, the opening / closing device 50 according to the seventh embodiment includes the buffer material 41 between the suction part 15 of the core 2 or the suction part 16 of the amateur 3 in the electromagnetic actuator 1. Even when the rigidity is small, plastic deformation of the suction portion 15 of the core 2 can be prevented, and variations in the initial load force can be suppressed. For this reason, the opening / closing device 50 according to the seventh embodiment can maintain the drive characteristics of the electromagnetic actuator in good condition, and can reliably perform the closing operation for closing the current interrupting unit 21 for a long period of time.
実施の形態８．
　図２９及び図３０は本発明の実施の形態８の電磁アクチュエータのコイル電流制御を説明する図である。図２９はコイル電流の電流値制御を説明する図であり、図３０はコイル電流値制御のタイミングを説明する図である。図３１、図３２及び図３３は、本発明の実施の形態８による電流供給装置の例を示す図である。図３４及び図３５は、本発明の実施の形態８による電磁アクチュエータの概略断面図である。図３４は電磁アクチュエータ１の第二状態すなわち開閉装置５０の閉極状態（図２参照）を示しており、図３５は電磁アクチュエータ１の第一状態すなわち開閉装置５０の開極状態（図１参照）を示している。実施の形態８における電磁アクチュエータ１及び開閉装置５０の基本構成を示す図は、実施の形態１を示す図１～４と同様である。実施の形態８の電磁アクチュエータ１は、開極衝撃によるアマチュア３のバウンスを低減又は防止するコイル電流制御を行う電流供給装置４３を備える点で実施の形態１の電磁アクチュエータ１と異なる。 Embodiment 8 FIG.
29 and 30 are diagrams illustrating coil current control of the electromagnetic actuator according to the eighth embodiment of the present invention. FIG. 29 is a diagram for explaining the current value control of the coil current, and FIG. 30 is a diagram for explaining the timing of the coil current value control. 31, FIG. 32 and FIG. 33 are diagrams showing examples of the current supply device according to the eighth embodiment of the present invention. 34 and 35 are schematic cross-sectional views of the electromagnetic actuator according to the eighth embodiment of the present invention. FIG. 34 shows the second state of the electromagnetic actuator 1, that is, the closing state of the switching device 50 (see FIG. 2). FIG. 35 shows the first state of the electromagnetic actuator 1, that is, the opening state of the switching device 50 (see FIG. 1). ). The basic configuration of the electromagnetic actuator 1 and the opening / closing device 50 according to the eighth embodiment is the same as FIGS. 1 to 4 showing the first embodiment. The electromagnetic actuator 1 of the eighth embodiment differs from the electromagnetic actuator 1 of the first embodiment in that it includes a current supply device 43 that performs coil current control that reduces or prevents bounce of the armature 3 due to the opening impact.
　電磁アクチュエータ１は、リンク機構２４を介して電流遮断部２１の接点（可動接点２２、固定接点２３）を閉極する。また、電磁アクチュエータ１は、開閉装置５０の電流遮断部２１の開極の際には、アマチュア３とコア２との衝突による開極衝撃がアマチュア３に印加され、アマチュア３は図３４、図３５の紙面上方向にバウンスする。アマチュア３のバウンスは、リンク機構２４を介して電流遮断部２１の接点（可動接点２２、固定接点２３）を閉極させる方向（図１における紙面下方向）に可動接点２２を移動させるため、接点間の開離距離、すなわち可動接点２２と固定接点２３との開離距離を減少させ開閉装置５０の遮断性能を低下させる。 The electromagnetic actuator 1 closes the contacts (movable contact 22 and fixed contact 23) of the current interrupting part 21 via the link mechanism 24. In the electromagnetic actuator 1, when the current interrupting portion 21 of the switchgear 50 is opened, the opening impact caused by the collision between the armature 3 and the core 2 is applied to the armature 3, and the armature 3 is shown in FIGS. 34 and 35. Bounce upwards. The bounce of the amateur 3 moves the movable contact 22 through the link mechanism 24 in a direction (downward in the drawing in FIG. 1) that closes the contact (movable contact 22, fixed contact 23) of the current interrupting portion 21. The separation distance between them, that is, the separation distance between the movable contact 22 and the fixed contact 23 is reduced, and the breaking performance of the switchgear 50 is lowered.
　図２９は、実施の形態１における開極位置（図１参照）での電磁アクチュエータ１の駆動特性の例を示している。図２９において、縦軸は付与力であり、横軸はコイル電流である。コイル電流はコイル電源４５又は他のコイル電源から供給される。電流値Ｉｃ２以下で０以上の電流域における、ある一定のコイル電流値では、磁路Ｍ１を通る磁束が磁路Ｍ２を通る磁束より多い。電流値Ｉｃ２以下で０以上の電流域では、磁路Ｍ１において開極方向の吸引力（図１の紙面下方向）を与える磁気ギャップが小さいため、図２９の付与力特性１０１が示すように電磁アクチュエータ１の出力を負（図１の紙面下方向）にすることが可能である。開極の際に、アマチュア３に開極衝撃が印加されアマチュア３がバウンスする直前から、図２９の負の付与力が発生するようにある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電することで、アマチュア３には開閉装置５０の開極方向の吸引力（図１の紙面下方向）が発生し、開極衝撃によるアマチュア３のバウンスを低減することが可能である。これにより、実施の形態８の電磁アクチュエータ１は、電流遮断部２１の接点間の開離距離、すなわち可動接点２２と固定接点２３との開離距離の減少を抑制でき、開閉装置５０の電流遮断性能の低下を防止できる。 FIG. 29 shows an example of drive characteristics of the electromagnetic actuator 1 at the opening position (see FIG. 1) in the first embodiment. In FIG. 29, the vertical axis represents the applied force, and the horizontal axis represents the coil current. The coil current is supplied from the coil power supply 45 or another coil power supply. In a certain coil current value in a current region that is equal to or smaller than the current value Ic2 and equal to or greater than 0, the magnetic flux passing through the magnetic path M1 is larger than the magnetic flux passing through the magnetic path M2. In the current region of current value Ic2 or less and 0 or more, the magnetic gap that provides the attractive force in the opening direction (downward direction in FIG. 1) in the magnetic path M1 is small. It is possible to make the output of the actuator 1 negative (downward in FIG. 1). At the time of opening, a certain coil current, for example, a coil current having a current value Ic2 is applied so that the negative applying force shown in FIG. 29 is generated immediately before the armature 3 is bounced when an opening shock is applied to the armature 3. As a result, an attractive force in the opening direction of the opening / closing device 50 (downward in the drawing in FIG. 1) is generated in the amateur 3, and it is possible to reduce bounce of the amateur 3 due to the opening impact. As a result, the electromagnetic actuator 1 according to the eighth embodiment can suppress the decrease in the separation distance between the contacts of the current interrupting portion 21, that is, the separation distance between the movable contact 22 and the fixed contact 23, and the current interruption of the switching device 50. Performance degradation can be prevented.
　開極の際に、アマチュア３に開極衝撃が印加されアマチュア３がバウンスする直前に、ある一定のコイル電流を通電する方法において、例えば、図３０に示すように開極時間Ｔ１を事前に測定し、開極時間Ｔ１の到達直前にある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電する制御（第一通電方法）を行えばよい。図３０は、電流遮断部２１の接点の閉極状態から開極状態になる際のアマチュア３のストローク特性を示している。図３０において、縦軸はアマチュアストロークであり、横軸は時間である。図３０に示したアマチュア３のストローク値は、電流遮断部２１が閉極状態のときに０であり、電流遮断部２１が最大に開極した状態（最終開極状態、最大開極状態）のときにＳｔ１になる。図３０に示したアマチュア３のストロークは、正の方向が図１の紙面下方向である。 In the method of energizing a certain coil current immediately before the armature 3 is bounced when an opening shock is applied to the armature 3 at the time of the opening, for example, the opening time T1 is measured in advance as shown in FIG. Then, a control (first energization method) for energizing a certain coil current, for example, a coil current having a current value Ic2, just before reaching the opening time T1 may be performed. FIG. 30 shows the stroke characteristics of the armature 3 when the contact of the current interrupting part 21 is changed from the closed state to the open state. In FIG. 30, the vertical axis is an amateur stroke, and the horizontal axis is time. The stroke value of the armature 3 shown in FIG. 30 is 0 when the current interrupting part 21 is in a closed state, and the current interrupting part 21 is in the maximum open state (final open state, maximum open state). Sometimes St1. In the stroke of the armature 3 shown in FIG. 30, the positive direction is the downward direction on the page of FIG.
　開極時間Ｔ１の到達直前にある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電するために、実施の形態８の電磁アクチュエータ１は例えばタイマ４６を有するコイル電源４５を備えている（図３１参照）。コイル電源４５は、電流遮断部２１の開極動作が開始されてからタイマによりカウントされた時間がＴ１になったときに、ある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電する。コイル電源４５は、前述した電流供給装置４３である。 In order to energize a certain coil current, for example, a coil current having a current value Ic2, immediately before reaching the opening time T1, the electromagnetic actuator 1 of the eighth embodiment includes a coil power supply 45 having a timer 46, for example (FIG. 31). The coil power supply 45 energizes a certain coil current, for example, a coil current having a current value Ic2, when the time counted by the timer after the opening operation of the current interrupting unit 21 is started becomes T1. The coil power supply 45 is the current supply device 43 described above.
　また、第一通電方法と別の通電方法もある。第二通電方法として、図３２に示すように、レーザー変位計やポテンショメータ等のストローク検出器４７を用いて、図３０に示すアマチュアストロークを測定し、電流遮断部２１の最終開極位置（最大開極位置）であるストローク値Ｓｔ１の直前に、ある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電する制御を行えばよい。図３２に示した第二通電方法を実行する電流供給装置４３は、コイル電源４５とストローク検出器４７を備えた例である。 Also, there is a different energization method from the first energization method. As the second energization method, as shown in FIG. 32, the armature stroke shown in FIG. 30 is measured using a stroke detector 47 such as a laser displacement meter or a potentiometer, and the final opening position (maximum opening) of the current interrupting unit 21 is measured. Just before the stroke value St1 that is the pole position), a control to energize a certain coil current, for example, the coil current having the current value Ic2, may be performed. A current supply device 43 that executes the second energization method shown in FIG. 32 is an example including a coil power supply 45 and a stroke detector 47.
　また、第三通電方法として、図３３に示すように、コア２もしくはアマチュア３に貼付した加速度センサ４８等で加速度の変化を測定し、アマチュア３に開極衝撃が印加された瞬間に生じる変曲点で、ある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電する制御方法も考えられる。図３３に示した第三通電方法を実行する電流供給装置４３は、コイル電源４５と加速度センサ４８を備えた例である。更に他の方法も考えられる。第四通電方法として、図３４、図３５に示すようにアマチュア３のストロークによって、強制的にスイッチ５１をオン（ＯＮ）し、ある一定の電流、例えば電流値Ｉｃ２のコイル電流をコイルに通電する構成も考えられる。 Further, as a third energization method, as shown in FIG. 33, a change in acceleration is measured with an acceleration sensor 48 or the like attached to the core 2 or the amateur 3, and an inflection that occurs at the moment when the opening impact is applied to the amateur 3. In terms of this point, a control method of energizing a certain coil current, for example, a coil current having a current value Ic2 is also conceivable. A current supply device 43 that executes the third energization method shown in FIG. 33 is an example including a coil power supply 45 and an acceleration sensor 48. Still other methods are possible. As a fourth energization method, as shown in FIGS. 34 and 35, the switch 51 is forcibly turned on (ON) by the stroke of the armature 3, and a certain current, for example, a coil current having a current value Ic2 is energized to the coil. Configuration is also conceivable.
　第四通電方法を実行するために、実施の形態８の電磁アクチュエータ１は、例えば機械動作式のスイッチ５１と、ある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電する直流電源５２を備えている。スイッチ５１は、アマチュア３がコア２に衝突する直前又は衝突したときにスイッチ５１がオンする位置に配置されている。スイッチ５１は、一度オンするとアマチュア３がバウンスしたとしてもオン状態が維持される。そして、スイッチ５１は、電流遮断部２１の閉極状態すなわち開閉装置５０の閉極状態に移行する際にオフされる。なお、直流電源５２は、電流遮断部２１が完全に開極された場合に電流の通電を停止するようになっている。図３４、図３５に示した第四通電方法を実行する電流供給装置４３は、スイッチ５１と直流電源５２を備えた例である。図３４及び図３５において、電磁アクチュエータ１の断面図を示しているが、引き出し線等が見えにくくならないように、断面においてハッチングを省略した。また、図３４及び図３５において、左右のコイル４の断面から紙面奥側に本来見える外周線も、引き出し線等が見えにくくならないように、省略した。 In order to execute the fourth energization method, the electromagnetic actuator 1 according to the eighth embodiment includes, for example, a mechanically operated switch 51 and a DC power source 52 that energizes a certain coil current, for example, a coil current having a current value Ic2. ing. The switch 51 is disposed at a position where the switch 51 is turned on immediately before or when the armature 3 collides with the core 2. Once the switch 51 is turned on, it remains on even if the amateur 3 bounces. The switch 51 is turned off when the current interrupting unit 21 is switched to the closed state, that is, the switching device 50 is closed. Note that the DC power supply 52 stops energization of the current when the current interrupting unit 21 is completely opened. A current supply device 43 that executes the fourth energization method shown in FIGS. 34 and 35 is an example including a switch 51 and a DC power supply 52. 34 and 35 show cross-sectional views of the electromagnetic actuator 1, but hatching is omitted in the cross-section so as not to make it difficult to see the lead lines and the like. In FIGS. 34 and 35, the outer peripheral lines that are originally visible from the cross section of the left and right coils 4 are omitted so that the lead lines and the like are not easily seen.
　実施の形態８の電磁アクチュエータ１は、開閉装置５０の開極の際に、アマチュア３に開極衝撃が印加されアマチュア３がバウンスする直前から、図２９の負の付与力が発生するようにある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電するので、アマチュア３には開閉装置５０の開極方向の吸引力（図１の紙面下方向）を発生させて、開極衝撃によるアマチュア３のバウンスを低減することができる。これにより、実施の形態８の電磁アクチュエータ１は、電流遮断部２１の接点間の開離距離、すなわち可動接点２２と固定接点２３との開離距離の減少を抑制でき、開閉装置５０の電流遮断性能の低下を防止できる。 In the electromagnetic actuator 1 according to the eighth embodiment, when the opening / closing device 50 is opened, a negative applying force shown in FIG. 29 is generated immediately before the opening impact is applied to the armature 3 and the armature 3 bounces. Since a constant coil current, for example, a coil current having a current value Ic2 is applied, the armature 3 generates an attractive force in the opening direction of the switchgear 50 (downward in the drawing in FIG. 1), and the armature 3 due to the opening shock. Bounce can be reduced. As a result, the electromagnetic actuator 1 according to the eighth embodiment can suppress the decrease in the separation distance between the contacts of the current interrupting portion 21, that is, the separation distance between the movable contact 22 and the fixed contact 23, and the current interruption of the switching device 50. Performance degradation can be prevented.
　実施の形態８の開閉装置５０は、電磁アクチュエータ１が、開閉装置５０の開極の際に、アマチュア３に開極衝撃が印加されアマチュア３がバウンスする直前から、図２９の負の付与力が発生するようにある一定のコイル電流、例えば電流値Ｉｃ２のコイル電流を通電するので、開極衝撃によるアマチュア３のバウンスを低減でき、電流遮断部２１の接点間の開離距離、すなわち可動接点２２と固定接点２３との開離距離の減少を抑制でき、開閉装置５０の電流遮断性能の低下を防止できる。 In the switchgear 50 according to the eighth embodiment, when the electromagnetic actuator 1 opens the switchgear 50, the negative applying force shown in FIG. 29 is applied immediately before the armature 3 bounces when an opening impact is applied to the armature 3. Since a certain coil current to be generated, for example, a coil current having a current value Ic2, is applied, bounce of the armature 3 due to the opening impact can be reduced, and the separation distance between the contacts of the current interrupting portion 21, that is, the movable contact 22 And the contact distance between the fixed contact 23 can be suppressed, and the current interruption performance of the switching device 50 can be prevented from being lowered.
　なお、スイッチ５１は、アマチュア３により押される機械動作式のスイッチに限らず、他のスイッチでも構わない。例えば、ストローク検出器４７や加速度センサ４８からの信号が予め定めた閾値を超えたことを示すトリガ信号でオンするようにしてもよい。また、実施の形態８に示した、開極衝撃によるアマチュア３のバウンスを低減するコイル電流の制御方法は、実施の形態２～７の電磁アクチュエータ１及び開閉装置５０にも適用できる。 Note that the switch 51 is not limited to a mechanically operated switch pushed by the amateur 3, and may be another switch. For example, it may be turned on with a trigger signal indicating that signals from the stroke detector 47 and the acceleration sensor 48 have exceeded a predetermined threshold. The coil current control method for reducing the bounce of the armature 3 due to the opening impact shown in the eighth embodiment can also be applied to the electromagnetic actuator 1 and the switchgear 50 according to the second to seventh embodiments.
　なお、本発明は、矛盾のない範囲内において、各実施の形態の内容を自由に組み合わせたり、各実施の形態を適宜、変形、省略したりすることが可能である。 In the present invention, it is possible to freely combine the contents of the respective embodiments or to appropriately modify and omit the respective embodiments within a consistent range.
　１…電磁アクチュエータ、２…コア、３…アマチュア、４…コイル、４ａ…コイル軸、６ａ…非磁性材、７…コア胴体部、８…コア蓋部、８ａ…内側面、９…コア開口端部、９ａ…内周面、９ｂ…内側面、９ｃ…突起部、１０…コア延長部、１１…アマチュア根元部、１１ｂ…周方向拡張部、１１ｃ…突起部、１２…アマチュア延伸部、１４…開口、１５…吸引部、２１…電流遮断部、２２…可動接点、２３…固定接点、２４…リンク機構、４１…緩衝材、４３…電流供給装置、５０…開閉装置、Ｇ１、Ｇ２、Ｇ４…磁気ギャップ、Ｌ１…集積公差、Ｍ１、Ｍ２、Ｍ３…磁路 DESCRIPTION OF SYMBOLS 1 ... Electromagnetic actuator, 2 ... Core, 3 ... Amateur, 4 ... Coil, 4a ... Coil shaft, 6a ... Nonmagnetic material, 7 ... Core body part, 8 ... Core lid part, 8a ... Inner side surface, 9 ... Core open end 9a ... inner peripheral surface, 9b ... inner side surface, 9c ... projection, 10 ... core extension, 11 ... amateur root, 11b ... circumferential extension, 11c ... projection, 12 ... amateur extension, 14 ... Opening, 15 ... suction part, 21 ... current interrupting part, 22 ... movable contact, 23 ... fixed contact, 24 ... link mechanism, 41 ... buffer material, 43 ... current supply device, 50 ... switchgear, G1, G2, G4 ... Magnetic gap, L1 ... Accumulation tolerance, M1, M2, M3 ... Magnetic path

Claims (12)

  1. 　コイルの内部に可動自在に配置された磁性体のアマチュアを、前記コイルにより発生させた磁束により駆動する電磁アクチュエータであって、
    前記コイルと、
    根元部と、前記根元部から前記コイルのコイル軸の方向に延伸して設けられると共に前記根元部よりも外径の小さな延伸部を有する前記アマチュアと、
    前記コイルの外側に配置されており、前記アマチュアと共に前記コイルにより発生された前記磁束が通過する磁路を形成する磁性体のコアと、を備え、
    前記アマチュアは、前記延伸部の外周から前記コイル軸に垂直な周方向に延伸した周方向拡張部を有し、
    前記コアは、
    前記アマチュアの前記周方向拡張部に対向して設けられると共に、前記磁束が通過することにより前記周方向拡張部との間に吸引力を発生させる吸引部、を当該コアの内側に有し、
    前記吸引部を前記磁束が通過する第一の磁路の外側に、前記アマチュアに対向すると共に前記磁束が通過する第二の磁路を形成するアマチュア対向部を有することを特徴とする電磁アクチュエータ。     An electromagnetic actuator for driving an armature of a magnetic body movably disposed inside a coil by a magnetic flux generated by the coil,
    The coil;
    A base part, and the armature having an extension part that extends from the base part in the direction of the coil axis of the coil and has an outer diameter smaller than the base part, and
    A magnetic core disposed on the outside of the coil and forming a magnetic path through which the magnetic flux generated by the coil passes with the armature, and
    The amateur has a circumferentially extending portion extending in a circumferential direction perpendicular to the coil axis from the outer periphery of the extending portion,
    The core is
    The armature has a suction portion that is provided opposite to the circumferential extension portion of the amateur and generates an attractive force between the circumferential extension portion when the magnetic flux passes,
    An electromagnetic actuator comprising an armature facing portion that forms a second magnetic path that faces the armature and that passes the magnetic flux outside the first magnetic path through which the magnetic flux passes through the attraction portion.
  2. 　前記コアは、前記アマチュアの前記延伸部が挿通可能な開口を形成するコア開口端部を有し、
    前記アマチュア対向部は、前記コア開口端部における前記アマチュアの前記延伸部に対向する内周面であり、
    前記吸引部は、前記コア開口端部における前記周方向拡張部に対向する内側面に形成されていることを特徴とする請求項１記載の電磁アクチュエータ。     The core has a core opening end that forms an opening through which the extension of the amateur can be inserted;
    The amateur facing portion is an inner peripheral surface facing the extending portion of the amateur at the core opening end portion,
    The electromagnetic actuator according to claim 1, wherein the suction portion is formed on an inner surface facing the circumferentially extending portion at the core opening end.
  3. 　前記コアは、前記アマチュアの前記延伸部が挿通可能な開口を形成するコア開口端部と、前記コア開口端部から前記コイル軸の方向に離れた位置で前記コア開口端部に対向するコア蓋部と、前記コア蓋部と前記コア開口端部を接続するコア胴体部と、前記コア胴体部における前記コア蓋部の側に前記コイル軸側に延伸して設けられたコア延長部を有し、
    前記アマチュア対向部は、前記アマチュアの前記根元部に対向する前記コア蓋部の内側面であり、
    前記吸引部は、前記周方向拡張部に対向する前記コア延長部に形成されていることを特徴とする請求項１記載の電磁アクチュエータ。     The core includes a core opening end portion that forms an opening through which the extension portion of the armature can be inserted, and a core lid that faces the core opening end portion at a position away from the core opening end portion in the direction of the coil axis. A core body part that connects the core lid part and the core opening end, and a core extension part that extends toward the coil shaft side on the core lid part side of the core body part. ,
    The amateur facing portion is an inner surface of the core lid portion facing the root portion of the amateur,
    The electromagnetic actuator according to claim 1, wherein the suction portion is formed in the core extension portion facing the circumferential extension portion.
  4. 　前記第一の磁路における前記磁束が通過する前記吸引部と前記吸引部に対向する前記アマチュアとの磁気ギャップは、前記第二の磁路における前記磁束が通過する前記アマチュア対向部と前記アマチュア対向部に対向する前記アマチュアとの磁気ギャップよりも小さいことを特徴とする請求項１から３のいずれか１項に記載の電磁アクチュエータ。 The magnetic gap between the attracting portion through which the magnetic flux passes in the first magnetic path and the amateur facing the attracting portion is the amateur facing portion through which the magnetic flux passes through the second magnetic path and the amateur facing The electromagnetic actuator according to any one of claims 1 to 3, wherein the electromagnetic actuator is smaller than a magnetic gap between the armature and the armature.
  5. 　前記コアの前記吸引部を前記磁束が通過する磁束通過面積は、前記第二の磁路における前記アマチュア対向部を前記磁束が通過する磁束通過面積よりも小さいことを特徴とする請求項１から４のいずれか１項に記載の電磁アクチュエータ。 5. The magnetic flux passage area through which the magnetic flux passes through the attraction portion of the core is smaller than the magnetic flux passage area through which the magnetic flux passes through the amateur facing portion in the second magnetic path. The electromagnetic actuator according to any one of the above.
  6. 　前記コアの前記吸引部、及び前記吸引部に対向する前記アマチュアの前記周方向拡張部の少なくとも一方は、対向する相手側に突出した突起部を有することを特徴とする請求項１から５のいずれか１項に記載の電磁アクチュエータ。 The at least one of the suction part of the core and the circumferential extension part of the amateur facing the suction part has a projecting part protruding to the opposite side of the core. The electromagnetic actuator of Claim 1.
  7. 　前記突起部は、前記相手側である突起対向部における前記コイル軸側の内周面よりも周方向の外側に、前記コア及び前記アマチュアの集積公差以上離して配置されたことを特徴とする請求項６記載の電磁アクチュエータ。 The projecting portion is arranged on the outer side in the circumferential direction from the inner peripheral surface on the coil shaft side in the projecting facing portion which is the counterpart side, and is spaced apart from the integration tolerance of the core and the amateur. Item 7. The electromagnetic actuator according to Item 6.
  8. 　前記コアの前記吸引部と前記アマチュアの前記周方向拡張部との間に、非磁性材を備えたことを特徴とする請求項１から７のいずれか１項に記載の電磁アクチュエータ。 The electromagnetic actuator according to any one of claims 1 to 7, wherein a non-magnetic material is provided between the suction portion of the core and the circumferential extension portion of the amateur.
  9. 　前記コアの前記吸引部及び前記アマチュアの前記周方向拡張部は、互いに対向するそれぞれの対向面が、前記コイル軸に対して傾斜していることを特徴とする請求項１から８のいずれか１項に記載の電磁アクチュエータ。 9. The suction portion of the core and the circumferentially extending portion of the armature, each facing surface facing each other is inclined with respect to the coil axis. The electromagnetic actuator according to item.
  10. 　前記アマチュアが前記コアの方へ移動する際に、前記アマチュアの前記周方向拡張部と前記コアの吸引部との間に吸引力を発生させる電流を、前記アマチュアが前記コアに衝突する時またはその直前に前記コイルへ供給する電流供給装置を備えたことを特徴とする請求項１から９のいずれか１項に記載の電磁アクチュエータ。 When the amateur moves toward the core, a current that generates a suction force between the circumferential extension portion of the amateur and the suction portion of the core is applied when the amateur collides with the core, or The electromagnetic actuator according to claim 1, further comprising a current supply device that supplies the coil to the coil immediately before.
  11. 　前記コアの前記吸引部と前記アマチュアの前記周方向拡張部との間に、緩衝材を備えたことを特徴とする請求項１から１０のいずれか１項に記載の電磁アクチュエータ。 The electromagnetic actuator according to any one of claims 1 to 10, wherein a buffer material is provided between the suction portion of the core and the circumferential extension portion of the amateur.
  12. 　内部に可動接点及び固定接点を有する電流遮断部と、前記電流遮断部の前記可動接点をリンク機構を介して、前記固定接点に接続するように移動させる、請求項１から１１のいずれか１項の電磁アクチュエータを備えたことを特徴とする開閉装置。 The current interruption part which has a movable contact and a fixed contact inside, and the movable contact of the current interruption part is moved so that it may connect to the fixed contact via a link mechanism. Opening and closing device comprising an electromagnetic actuator.
PCT/JP2017/008236 2016-03-11 2017-03-02 Electromagnetic actuator and switch device WO2017154720A1 (en)

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