JP2002319504A - Electromagnetic linear actuator and remote controller of circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic linear actuator which is effective in operation and handleability as an actuator of a remote operation device for turning on and off a switch by remote operation. SOLUTION: The electromagnetic linear actuator is constituted by combining a removing unit 2 wherein permanent magnets 3 are arranged in parallel on right and left surfaces with a pair of right and left electromagnets constituted of E-shaped magnetic cores 4, 5. The electromagnets sandwich the moving unit 2 and are arranged facing each other on both sides of the moving unit 2 and an exciting coil 6 wound around center legs 4a, 5a of the cores 4, 5. The distance between the central magnetic legs of the E-shaped magnetic cores and one outside magnetic pole is set to be smaller than the distance between the central legs and the other outside magnetic poles. By switching over the direction of an exciting current applied to the exciting coil, the moving unit is turned over between two operating positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic linear actuator suitable for opening and closing a circuit breaker (distribution circuit breaker), and a circuit breaker for driving an operation handle of the circuit breaker with the electromagnetic linear actuator. The present invention relates to a remote operation device for a vessel.

[0002]

2. Description of the Related Art As a remote operating device of a circuit breaker described above, a drive motor is combined with a reduction gear, a feed screw mechanism, or a rack / pinion mechanism, and the operation of the circuit breaker is converted by converting the rotation of the motor into a linear motion. Turn on the handle,
A system that switches to the OFF position has been put to practical use as a product.

[0003]

By the way, the above-mentioned conventional remote operation device for a circuit breaker requires a manufacturing cost,
And there are the following difficulties in handling. (1) Since the geared motor and the screw-type or rack-pinion-type transmission mechanism are used, the structure is complicated and large, and the product price is high.

(2) Further, since a considerably large force is required to turn on, off, and reset the circuit breaker by operating the steering wheel, the geared motor used in the remote operation device has a large reduction ratio, which causes a power failure. In order to switch off the circuit breaker at times, it is difficult to manually operate the circuit breaker to the OFF position with the remote operation device attached.

The present invention has been made in view of the above points, and has as its object to turn on and off a circuit breaker by remote control.
F. An object of the present invention is to provide an electromagnetic linear actuator suitable for applications such as a remote operating device for performing a reset operation, and a remote operating device for a circuit breaker employing the electromagnetic linear actuator.

[0006]

In a circuit breaker for wiring or the like, a contact opening / closing mechanism linked to an operation handle has a configuration in which a toggle link mechanism, an opening / closing spring, and a latch mechanism are combined. Here, the operating force required to drive the handle of the circuit breaker to the ON / OFF and reset positions using the remote operating device (= reaction force of the operating handle) is determined by the OFF operation in relation to the contact opening / closing mechanism described above. <ON operation <Reset operation. In particular, when the circuit breaker trips and the handle is operated from the trip position to the reset position to reset the latch of the contact opening / closing mechanism, a large reaction force is generated in the latter half of the stroke. (Note that the reaction force-displacement characteristics of the handle are shown in FIG. 7 (b)
Will be described later).

In the present invention, a reaction force-displacement characteristic acting on a linear actuator via a handle when the circuit breaker is turned on, off, or reset, with respect to the electromagnetic linear actuator employed in the remote operation device described above. In response to the above, a thrust-displacement characteristic in which the thrust increases in the latter half of the stroke on the OFF side is provided. Specifically, in order to achieve the above object, the electromagnetic linear actuator of the present invention is It shall be configured as described.

(1) A mover having permanent magnets attached to the left and right sides, an E-shaped magnetic core disposed opposite to both sides of the mover, and an exciting coil wound around the center leg of the magnetic core. The distance between the central magnetic pole of the E-shaped magnetic core and one of the outer magnetic poles is set to be smaller than the distance between the central magnetic pole and the other outer magnetic pole. The direction of the exciting current flowing through the coil is switched so that the mover is reversed between the two operating positions.

(2) In the above (1), the outer magnetic pole of the E-shaped magnetic core is provided with a protruding magnetic pole protruding from the end thereof and facing the end face of the mover (claim 2). (3) A pair of left and right exciters each comprising a mover provided with permanent magnets on the left and right side surfaces, an E-shaped magnetic core disposed opposite to both sides of the mover, and an exciting coil wound around the center leg of the magnetic core. An electromagnetic linear actuator comprising a combination with an electromagnet, in which the direction of an exciting current flowing through the exciting coil is switched so that the mover is reversed between two operating positions, the outer magnetic pole of the E-shaped magnetic core and Only the magnetic pole surface of the mover magnetic pole facing the magnetic pole or the outer magnetic pole surface of the E-shaped magnetic core is inclined with respect to the moving direction of the mover (claim 3).

(4) A mover having two sets of permanent magnets attached to the left and right side surfaces, and an E arranged oppositely on both sides of the mover.
And a pair of left and right electromagnets comprising an exciting coil wound around a central leg of the magnetic core, and switching the direction of an exciting current flowing through the exciting coil to move the mover between two operating positions. In the electromagnetic linear actuator, the magnetic pole strength of the permanent magnet provided on one outer magnetic pole side of the mover is set to be larger than that of the permanent magnet provided on the other outer magnetic pole side ( Claim 4).

(5) In the above item (4), the magnetic poles of the permanent magnets facing each other across the mover are set to different polarities.

In the electromagnetic linear actuator having the above configuration, when the direction of the current flowing through the exciting coil of the electromagnet is switched, the direction of the magnetic thrust acting between the electromagnet and the magnetic pole of the mover is reversed, and the mover is moved from one operating position to the opposite position. Reverse operation to move to the side operation position. Here, a large driving force corresponding to two electromagnets can be secured by the configuration in which the electromagnets are arranged on both sides of the mover with the mover interposed therebetween, and at the time of operation, a direction perpendicular to the moving direction between the left and right electromagnets and the mover. The magnetic attraction forces acting on the movable member cancel each other, thereby reducing the frictional force applied to the guide mechanism for guiding and supporting the mover in the moving direction. Further, by setting one of the permanent magnets facing each other across the yoke of the mover to the N-pole and the other to the S-pole, the yoke does not become magnetically saturated even if the cross-sectional area is small. Can be achieved.

Further, in the remote control device for a circuit breaker according to the present invention, the movable element of the electromagnetic linear actuator is connected to the operation handle of the circuit breaker, and the circuit is operated by reversing the linear actuator by controlling the energizing coil. It is assumed that the circuit breaker is switched to ON, OFF and reset positions (claim 6).

In this configuration, when an ON / OFF / reset command of the circuit breaker is externally given to the electromagnetic linear actuator, the mover of the linear actuator moves in response to the command, and the operation handle of the circuit breaker is operated. To ON, OFF, and reset positions. In addition, this remote operation device is geared motor and screw type, rack and
The number of parts is smaller, the structure is simpler, and the device can be manufactured at low cost as compared with a conventional device in which a pinion type transmission mechanism is combined.
In addition, since a gear mechanism that converts rotation to linear motion is not used, the handle of the circuit breaker must be manually turned OFF while the remote operation device is still attached to the circuit breaker during a power failure.
The operation can be switched to the F position.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the illustrated embodiments. Embodiment 1 First, the configuration of an electromagnetic linear actuator according to the present invention is shown in FIG. In this embodiment, an electromagnetic linear actuator 1 comprises a mover 2, a permanent magnet 3 attached to the left and right side surfaces thereof, and a pair of left and right electromagnets arranged at symmetrical positions on both left and right sides of the mover 2 therebetween. Have been. Here, the electromagnet includes E-shaped magnetic cores 4 and 5, and an exciting coil 6 wound around central legs 4a and 5a of the magnetic cores 4 and 5 via a bobbin 6a. The permanent magnet 3 is magnetized in the longitudinal direction. In the illustrated example, the polarity of the magnetic pole (N, S pole) is set to the opposite polarity between the left permanent magnet and the right permanent magnet, and the permanent magnet 3 is movable. The distance between the NS poles of the permanent magnet 3 attached to the armature 2 (total length of the mover 2) is A, and the center magnetic poles (center legs 4a,
B <A where B is the distance between the outer magnetic poles (outer legs 4b and 4c and the outer legs 5b and 5c on the opposite side). Although not shown, the mover 2 is guided and supported so as to be slidable in the operation direction (up and down direction in the figure) through a guide mechanism such as a guide rod and a rail.

In this configuration, when the mover 2 is at the position indicated by the solid line in the drawing and the exciting coil 6 is not excited, the mover 2 is moved by the magnetic force acting between the permanent magnet 3 and the E-shaped magnetic cores 4 and 5. Is held at this position by suction. When a DC current is applied to the exciting coil 6 from this state, the magnetic pole surfaces of the center legs 4a, 5a and the outer legs 4b, 4c and 5b, 5c of the E-shaped magnetic cores 4, 5 correspond to the current direction of the exciting coil 6. The N and S poles appear due to the generated magnetomotive force, and a magnetic repulsive force and an attractive force act on the N and S poles of the permanent magnet 3.

Here, the left magnetic core 4 has a central pole 4
The right magnetic core 5 has a central pole 5a having an S pole and outer legs 5b and 5a so that a has an N pole and outer legs 4b and 4c have S poles.
When the current direction of the exciting coil 6 wound around each of the magnetic cores 4 and 5 is controlled so that c becomes the N pole, the movable element 2 is moved by the magnetic repulsive force and the attractive force acting between the exciting coil 6 and the permanent magnet 3 as indicated by the solid line in FIG. It is driven upward from the operating position and moves to the operating position indicated by the chain line. When the polarity of the magnetic pole is reversed by switching the direction of the current flowing through the exciting coil 6 from this state, the mover 2 performs a reversing operation so as to return to the original solid line position from the chain line position. That is, each time the direction of the current flowing through the exciting coil 6 is reversed, the mover 2 performs a reversing operation and moves from one operation position to the other operation position.

In this case, since the magnetic cores 4 and 5 of the electromagnets are opposed to the left-right symmetric position with the mover 2 interposed therebetween as shown in the drawing, the driving force acting on the mover 2 by energizing the exciting coil 6 is This is twice the magnetic thrust acting between each magnetic core. In addition, the magnetic forces acting between the magnetic cores 4 and 5 and the permanent magnet 3 of the mover 2 in the direction perpendicular to the moving direction of the mover cancel each other and cancel each other out. It can be moved smoothly without receiving a large frictional resistance between the guide mechanism and the like.

[Embodiment 2] FIG. 2 shows an application embodiment of the present invention. In this embodiment, the mover 2 is provided with two permanent magnets 3a, 3a, 3b, 4c and 4c, which are magnetized on the left and right sides of the yoke (magnetic body) 2a in the thickness direction as shown in FIG.
3b are attached to the upper and lower ends so that they have opposite polarities. In addition, E of the electromagnet arranged on both sides of the mover 2
The U-shaped magnetic cores 4 and 5 and the exciting coil 6 have the same configuration as in FIG. In this embodiment, the N pole of the permanent magnet 3a is located at the upper end of the mover 2 and the S pole of the permanent magnet 3b is located at the lower end.
The poles are opposed to the magnetic cores 4 and 5, respectively, and the direction of the current flowing through the excitation coil 6 of the magnetic cores 4 and 5 during operation is controlled in accordance with the polarity.

In this configuration, the yoke 2a of the mover 2 forms a magnetic path extending over the permanent magnets 3a and 3b, and the direction of the current flowing through the exciting coil 6 of the magnetic cores 4 and 5 is switched. The direction of the magnetic thrust acting between the movable element 2 and the movable element 2 is reversed, and the movable element 2 moves from one operation position to the other operation position. FIG. 3 shows a magnetic field line distribution when the exciting coil 6 is excited in this embodiment.

[Embodiment 3] FIG. 4 shows another embodiment of the present invention which is an improvement of the embodiment 2 described above. In this embodiment, the polarities of the permanent magnets 3a and 3b attached to the left and right side surfaces of the mover 2 are set as follows, as compared with the second embodiment. That is, the upper and lower permanent magnets 3a and 3b provided on the right side of the mover yoke 2a have the same polarity as in FIG. 2, but the permanent magnets provided on the left side are set to have the opposite polarity to the right side permanent magnet. The north pole and the south pole of the left and right permanent magnets face each other with the yoke 2a therebetween.

According to this configuration, the magnetic flux between the permanent magnets arranged vertically on the left side of the yoke 2a as a magnetic path and the magnetic flux between the permanent magnets arranged vertically on the right side cancel each other in opposite directions. Therefore, even if the cross-sectional area of the yoke 2a is reduced, it is not affected by magnetic saturation, which is advantageous for miniaturizing the actuator. [Embodiment 4] FIG. 5 shows another embodiment of the electromagnetic linear actuator of the present invention. In this embodiment, the yoke 2a of the mover 2 has an I-shaped cross section, and the upper and lower ends thereof are magnetic pole portions 2c. The excitation coil 7 is wound around the center of the yoke 2a instead of a permanent magnet. On the left and right sides of the mover 2 as in the above-described embodiments, E
The excitation coils 6 are attached to the central legs 4a and 5a of the V-shaped magnetic cores 4 and 5, respectively.
The linear actuator is configured by arranging electromagnets wound with.

When a current flows through the exciting coil 7 of the mover 2 in such a configuration, N and S poles appear at the upper and lower magnetic poles 2b of the mover 2 according to the direction of the current, and the magnetic poles 4 and 5 of the electromagnet communicate with each other. Electromagnetic attraction and repulsion act between them. As a result, the upper or lower electromagnetic thrust acts on the mover 2 as in the first and second embodiments, and the mover 2 moves between the two operating positions.

In this embodiment, when energization of the exciting coils 6 and 7 is stopped, the coil magnetomotive force becomes zero and the movable element 2
Are not affected by the magnetic force of the coil. Therefore, if the linear actuator is applied to the remote operation device of the circuit breaker as described later, even if the remote operation device does not operate due to a power failure, the magnetic binding force is small and the handle of the circuit breaker is manually operated. Can be switched easily.

[Embodiment 5] Next, FIG. 6 (a) shows the principle of the remote control device for a circuit breaker of the present invention, which is constructed by employing the above-mentioned electromagnetic linear actuator, and the remote control circuit thereof. ) and (b). In FIG. 6 (a),
8 is a circuit breaker, and 9 is a remote operation device of the circuit breaker. The remote operation device 9 is composed of an assembly of an electromagnetic linear actuator 1 and a concave attachment 10 coupled to a mover 2 with a permanent magnet of the linear actuator. The attachment 10 is mounted on a circuit breaker case. It is engaged with the head of the handle 8a of the circuit breaker 8. The mover 2 of the linear actuator 1 is slidably guided and supported by a guide rod 1a. The excitation coil 6 of the actuator in the remote operation device 9 includes a DC power supply 11 and a changeover switch 1.
2 are connected via a wiring 14. FIG. 6B is a diagram showing ON, OFF, trip, and reset positions of the operation handle 8a.

In such a configuration, the remote control circuit 1
When an operation command is given to the remote operation device 9 of the circuit breaker 8 via the changeover switch 12 on the side 3, the excitation coil 6 of the linear actuator 1 incorporated in the remote operation device 9 is excited and corresponds to the direction of the excitation current. And mover 2
Is driven to the opposite operation position, and the operation handle 8a follows the movement of the mover 2 so that the circuit breaker 8
Are turned ON, OFF and reset.

Next, an example in which the electromagnetic linear actuator shown in FIG. 2 is employed as the linear actuator of the remote operation device 9 and the circuit breaker 8 is turned on, off and reset using the remote operation device 9 will be described. Its ON
The electromagnetic thrust generated in the linear actuator in the operation strokes on the side and the OFF side is represented by the thrust-displacement characteristic in FIG. 7 (a). In FIG. 7 (b), when the circuit breaker 8 is turned on, off and reset, It shows the reaction force-displacement characteristics applied to the handle. In each figure, the horizontal axis represents the relative position (distance) of the mover (ON, OFF direction) with respect to the center of the E-shaped magnetic core of the electromagnet in the electromagnetic linear actuator, and the vertical axis represents the force (force). And direction (ON side: +, OFF side:-)
Is represented. The thrust-displacement characteristics and the reaction force-displacement characteristics were obtained by the inventors by a simulation method.

Here, the characteristic line A in FIG. 7A indicates the thrust generated when the electromagnet is excited to drive the mover in the ON direction, and the characteristic line B indicates the thrust generated when the electromagnet is excited in the reverse direction. OF
F, the thrust generated when driving in the reset direction, and the characteristic line C represents the thrust due to the magnetic force of the permanent magnet when the electromagnet is not excited. The thrust when the electromagnet is excited is ON,
The relative position is zero in the OFF direction, that is, when the mover is relatively positioned at the center of the magnetic core of the electromagnet, it is maximum.

On the other hand, in FIG. 7B, a characteristic line D represents a reaction force applied to the electromagnetic linear actuator of the remote operation device via the handle when the handle of the circuit breaker is turned ON, and a characteristic line E is OFF. The reaction force at the time of the operation, and the characteristic line F represents the reaction force applied when the handle is moved from the trip position to the reset position after the circuit breaker trips to the OFF position. As can be seen from this characteristic diagram, the magnitude of the reaction force applied when the circuit breaker is turned ON, OFF, and reset is OFF operation <ON
Operation <reset operation. Also, ON operation, O
The reaction force at the time of the FF operation is concentrated almost at the center of the relative position, whereas the reaction force at the time of the reset operation is off-center from the center.
It is concentrated in the latter half of the F operation stroke. This is because when the handle is moved from the trip position to the reset position and the latch of the contact opening / closing mechanism is engaged with the latch receiver, a spring force is applied as a reaction force after passing the OFF position.

The above-described reaction force-displacement characteristic is peculiar to a circuit breaker. Under such a load condition, the handle of the circuit breaker is turned ON and OFF using a remote operation device.
F, to operate the reset position, a thrust (mechanical output) of the remote operation device that exceeds this reaction force-displacement characteristic is required. By the way, comparing the thrust-displacement characteristic shown in FIG. 7 (a) with the reaction force-displacement characteristic shown in FIG. 7 (b), the thrust is O
In both the N and OFF operation strokes, the peak is near the relative position 0, whereas the reaction force has a peak in the latter half of the OFF operation stroke, and the matching between the thrust-displacement characteristic and the reaction force-displacement characteristic. Poor. Therefore, in order to generate a large thrust exceeding the reaction force of the reset operation with the remote operation device as it is, it is necessary to supply a large current to the electromagnet of the electromagnetic linear actuator to increase its magnetomotive force. However, when a large current is applied to the electromagnet of the actuator, the current capacity increases and the size of the iron core and the coil increases, and the reaction force corresponding to the operation to the ON / OFF position shown in FIG. D, E), the thrust of the actuator (characteristic lines A, B) becomes excessive, and the power use efficiency decreases.

In this regard, according to the embodiment of the present invention described below, the thrust-displacement characteristic and the reaction force-displacement characteristic of the electromagnetic linear actuator 1 employed in the remote operation device 9 shown in FIG. And the thrust can be increased in the latter half of the stroke when the switch is operated to the OFF side. As a result, a small, small-capacity electromagnetic linear actuator can be used without using an electromagnet with a large current capacity as described above. ON, OFF, and reset operations can be sufficiently supported.

Embodiment 6 FIGS. 8A and 8B show another embodiment of the electromagnetic linear actuator of the present invention. In this embodiment, the basic structure is the same as that shown in FIG. 2 or FIG. 3, but with respect to the E-shaped magnetic cores 4 and 5 of the electromagnet, central legs 4a and 5a and one outer leg 4b are provided. , 5b is smaller than the distance d1 between the other outer legs 4c, 5c (d1> d2).
Is set to The drawing shows a state in which the mover 2 is relatively positioned at the center of the magnetic cores 4 and 5. When the circuit breaker is turned ON, the mover 2 is driven to the left, and the OFF operation is performed in correspondence with FIG. It is assumed that the mover 2 is driven rightward during the reset operation. In accordance with this, the center legs 4a, 5a of the magnetic cores 4, 5 are connected to the center pole and the left leg 4a.
b and 5b are defined as ON-side magnetic poles, and the right legs 4c and 5c are defined as OFF-side magnetic poles.

With such a configuration, based on the relationship between the relative positions of the magnetic poles of the magnetic cores 4 and 5 and the permanent magnets 3a and 3b attached to the mover 2, as shown in the characteristic diagram of FIG. In the thrust-displacement characteristic of the permanent magnets 3a and 3b in the non-excited state of No. 6, the position where the thrust reverses is displaced from the center position 0 to the OFF side as indicated by the characteristic line C. As a result, the thrust by the permanent magnet acts as a bias thrust, and the thrust-displacement characteristic lines A and B in a state where the excitation coil 6 is excited are compared with the characteristic line pattern of FIG. The thrust peak shifts right and left. In particular, OF
In the stroke to be operated on the F side, the peak of the characteristic line B shifts to the latter half of the stroke from the center position, so that the thrust is applied to the OFF and reset operations of the circuit breaker even in the entire stroke. It exceeds the reaction force characteristic lines E and F.

Therefore, as an electromagnetic linear actuator incorporated in the remote control device, the circuit breaker can be reliably turned ON, OFF and reset without increasing the current supplied to the exciting coil 6 of the electromagnet more than necessary. Thus, the size of the remote control device and the power consumption can be reduced. Embodiment 7 FIGS. 9 (a) and 9 (b) show another embodiment of the present invention. In this embodiment, as shown in FIG. 9 (a), the moving stroke of the mover 2 required as a remote operation device is secured, and then the E-shaped magnetic cores 4, 5
In the right leg 4c, 5c corresponding to the OFF-side magnetic pole, projections 4d, 5d are formed so as to protrude from the end thereof toward the moving side of the mover 2 and face the end face of the mover.

Thus, during the stroke of driving the mover 2 to the OFF side, the tip of the mover 2 is
When the distance approaches 5d, magnetic attraction acts between the protrusion and the protrusion, and FIG.
As shown by the characteristic line B in (b), the thrust increases in the latter half of the stroke in the OFF operation stroke, and exceeds the reaction force of the reset operation represented by the characteristic line F. [Embodiment 8] FIGS. 10A and 10B show another embodiment of the present invention. In this embodiment, as shown in FIG. 10 (a), the yoke 2a of the mover 2 is formed with a tapered portion 2c having a taper angle .theta.
a is attached. Further, the OFF-side legs 4c, 5c of the magnetic cores 4, 5 are formed with tapered magnetic pole surfaces 4e, 5e having an angle θ inside the magnetic cores 4, 5 so as to face the tapered portion 2c.

Thus, during the stroke of driving the mover 2 to the OFF side, the magnetic attraction force acting between the permanent magnet 3a of the mover 2 and the tapered magnetic pole surfaces 4e, 5e of the magnetic cores 4, 5 is reduced. Of these, the vector component parallel to the moving direction of the mover increases, and the effective thrust increases accordingly. As a result, the thrust increases in the latter half of the stroke in the OFF operation stroke as indicated by the characteristic line B in FIG.
It exceeds the reaction force of the reset operation represented by.

Ninth Embodiment FIG. 11 shows an application of the eighth embodiment. In this embodiment, the magnetic cores 4 and 9 are used.
The tapered magnetic pole surfaces 4e, 5e having an angle θ are formed only inside the OFF-side legs 4c, 5c of No. 5 and no taper portion is formed on the mover 2 side. Also in this embodiment, the permanent magnet 3a of the mover 2 and the tapered magnetic pole surfaces 4e, 5e of the magnetic cores 4, 5 are used in the stroke process of driving the mover 2 to the OFF side.
e, the vector component of the magnetic attractive force acting in parallel with the moving direction of the mover increases, and the effective thrust increases, and the same effect as in the eighth embodiment can be obtained. Embodiment 10 FIG. 12 shows another embodiment of the present invention. In this embodiment, with respect to the two permanent magnets 3a and 3b attached to the left and right ends of the mover 2, the length of the OFF-side permanent magnet 3a is L1 and the length of the ON-side permanent magnet 3b is L2. > L2, and the magnetic pole strength of the permanent magnet 3a attached to the OFF side is larger than that of the permanent magnet 3b attached to the ON side. With this configuration, the mover 2
It is confirmed that the thrust generated in the stroke of driving the motor to the OFF side increases in the latter half of the stroke, and the same effect as in the above-described embodiments is obtained.

Although the above-described Embodiments 6 to 10 can be used alone to exert an effect on the operation function of the circuit breaker as a remote operation device, the configuration of Embodiment 6 shown in FIG. 12 can be expected to further improve the function.

[0039]

As described above, according to the electromagnetic linear actuator of the present invention, a pair of E-shaped magnetic cores are provided with an exciting coil wound as a stator on both left and right sides of a movable element provided with a permanent magnet. Are arranged symmetrically so that the magnetic force acting in the direction perpendicular to the moving direction of the mover between the magnetic core and each other can be canceled out, and the mover can be driven with a large magnetic thrust in the moving direction. In addition, it is possible to improve the consistency between the reaction force-displacement characteristic peculiar to the circuit breaker and the thrust-displacement characteristic of the linear actuator, so that the remote control device can be downsized and the power consumption can be reduced.

Further, according to the circuit breaker remote operation device constituted by employing the linear actuator, the number of parts is smaller than that of the conventional device constituted by a geared motor, a feed screw mechanism and the like, and the structure is simple and inexpensive. Even if it is necessary to manually switch the circuit breaker due to a power failure or the like, the handle of the circuit breaker can be manually operated with the remote operation device attached.

[Brief description of the drawings]

FIG. 1 is a configuration perspective view of an electromagnetic linear actuator according to a first embodiment of the present invention.

FIG. 2 is a configuration perspective view of an electromagnetic linear actuator according to a second embodiment of the present invention.

FIG. 3 is a magnetic force line distribution diagram in an excited state of the electromagnet according to the configuration of FIG. 2;

FIG. 4 is a configuration perspective view of an electromagnetic linear actuator according to a third embodiment of the present invention.

FIG. 5 is a configuration perspective view of an electromagnetic linear actuator according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a remote operation device of a circuit breaker according to a fifth embodiment of the present invention.
And its remote control circuit diagram. (B) is a diagram showing each operation position of the handle of the circuit breaker.

7A and 7B are operating characteristic diagrams of the remote operation device of FIG. 6, wherein FIG. 7A is a thrust-displacement characteristic diagram of the electromagnetic linear actuator of FIG. 2 and FIG. 7B is a diagram showing ON / OFF and reset operations of the circuit breaker; Accompanying reaction force-displacement characteristic diagram

8A and 8B are explanatory diagrams of an electromagnetic linear actuator according to a sixth embodiment of the present invention, where FIG. 8A is a configuration diagram and FIG.

9A and 9B are explanatory diagrams of an electromagnetic linear actuator according to a seventh embodiment of the present invention, wherein FIG. 9A is a configuration diagram and FIG. 9B is an operation characteristic diagram.

10A and 10B are explanatory diagrams of an electromagnetic linear actuator according to Embodiment 8 of the present invention, wherein FIG. 10A is a configuration diagram, and FIG. 10B is an operation characteristic diagram.

FIG. 11 is a configuration diagram of an electromagnetic linear actuator according to a ninth embodiment of the present invention.

FIG. 12 is a configuration diagram of an electromagnetic linear actuator according to Embodiment 10 of the present invention.

[Explanation of symbols]

 Reference Signs List 1 electromagnetic linear actuator 2 mover 2a yoke 2b magnetic pole 2c taper 3,3a, 3b permanent magnet 4,5 E-shaped magnetic core 4a, 5a center leg 4b, 5b outer leg (ON side) 4c, 5c outer leg (OFF side) 4d, 5d Projection 4e, 5e Tapered magnetic pole surface 6, 7 Excitation coil 8 Circuit breaker 8a Operation handle 9 Remote operation device 13 Remote control circuit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Ishido 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Kenji Suzuki 1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Inside Fuji Electric Co., Ltd. (72) Nobuo Asahi 1-1, Tanabe-Nita, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term inside Fuji Electric Co., Ltd. 5E048 AB04 AC05 AC06 AD02 CA01 5G030 AB01

Claims (6)

[Claims] 1. A mover having permanent magnets attached to left and right side surfaces,
A central magnetic pole of the E-shaped magnetic core, comprising a combination of an E-shaped magnetic core disposed on both sides thereof with the mover interposed therebetween, and a pair of left and right electromagnets including an exciting coil wound around a central leg of the magnetic core; The distance between the outer magnetic pole and one of the outer magnetic poles is set smaller than the distance between the center magnetic pole and the other outer magnetic pole, and the direction of the exciting current flowing through the exciting coil is switched to move the mover between the two operating positions. An electromagnetic linear actuator characterized in that a reversal operation is performed between the actuators. 2. An electromagnetic linear actuator according to claim 1, wherein said outer magnetic pole of said E-shaped magnetic core is provided with a protruding magnetic pole protruding from its end and facing the end face of said mover. Linear actuator. 3. A mover having permanent magnets attached to left and right side surfaces,
It consists of a combination of an E-shaped magnetic core disposed on both sides thereof with the movable element interposed therebetween and a pair of left and right electromagnets composed of an excitation coil wound around a center leg of the magnetic core. In an electromagnetic linear actuator in which the direction is switched to reverse the mover between two operation positions, an outer magnetic pole of the E-shaped magnetic core and a magnetic pole surface of a mover magnetic pole facing the magnetic pole, or E
An electromagnetic linear actuator characterized in that only the outer magnetic pole surface of the letter-shaped magnetic core is inclined with respect to the moving direction of the mover. 4. A mover having two sets of permanent magnets attached to the left and right sides, an E-shaped magnetic core disposed opposite to both sides of the mover, and an exciting coil wound around a center leg of the magnetic core. An electromagnetic linear actuator comprising a combination of a pair of left and right electromagnets, wherein the direction of an exciting current flowing through the exciting coil is switched so that the mover is reversed between two operation positions. An electromagnetic linear actuator, wherein the magnetic pole strength of a permanent magnet provided on one outer magnetic pole side is set to be larger than that of a permanent magnet provided on the other outer magnetic pole side. 5. The electromagnetic linear actuator according to claim 4, wherein the magnetic poles of the permanent magnets facing each other across the mover have different polarities. 6. The circuit breaker according to claim 1, wherein the movable member of the electromagnetic linear actuator is connected to an operation handle of the circuit breaker, and the circuit breaker is inverted by a reversal operation of the linear actuator by controlling the excitation coil. ON, O
A remote operation device for a circuit breaker, which is operated to switch to a flip-flop or reset position.