JP2013115840A - Electromagnetic actuator and electromagnetic relay using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic actuator capable of effectively utilizing total drive energy generated by an exiting coil to move a mover and sharing a 100 V rating with a 200 V rating.SOLUTION: The electromagnetic actuator comprises: a yoke including a bottom plate part, a pair of armature parts facing to each other in a longitudinal direction and a pair of coil mounting parts facing to each other in a horizontal direction; an exiting coil mounted in each coil mounting part; a mover made of a magnetic material and arranged between the pair of armature parts; and permanent magnets provided in each armature part. The mover is movable in a longitudinal direction thereof.

Description

  The present invention relates to an electromagnetic actuator that reciprocates a mover by intermittently energizing an exciting coil, and an electromagnetic relay using the electromagnetic actuator.

  As an electromagnetic actuator used for a conventional electromagnetic relay or the like, a first yoke having a pair of first and second armature pieces made of a magnetic material and facing each other, a first exciting coil, A bobbin disposed between a pair of armature pieces, a magnetic material mover inserted in a bobbin mover insertion hole, and a first yoke and a bobbin are wound with a second exciting coil. There is one constituted by an arranged permanent magnet and a second yoke that forms a magnetic circuit together with the permanent magnet (see, for example, Patent Document 1).

  In this electromagnetic actuator, for example, when a current is passed through the first excitation coil, an electromagnet is formed by the first excitation coil, and the mover moves and is attracted to the first armature piece in the first yoke. The Even after the excitation of the first exciting coil is cancelled, the mover is moved by the magnetic force of the permanent magnet acting by the magnetic circuit formed by the permanent magnet, the first yoke, and the second yoke. The adsorption state to the first armature piece is maintained.

  Similarly, when a current is passed through the second exciting coil, the mover moves and is attracted to the second armature piece in the first yoke. Even after the excitation of the second exciting coil is canceled, the mover is moved by the magnetic force of the permanent magnet acting by the magnetic circuit formed by the permanent magnet, the first yoke, and the second yoke. The adsorption state to the two armature pieces is maintained.

JP 2010-093948 A (page 3-4, FIG. 3)

In the electromagnetic actuator described in Patent Document 1, in order to move the mover in the first armature piece direction, current is passed through the first exciting coil, and the mover is moved in the second armature piece direction. The movement is performed by passing a current through the second exciting coil. That is, only the driving energy generated by only one of the first exciting coil or the second exciting coil can be used to move the mover, and the driving energy that can be generated by the exciting coil cannot be used effectively. There was a problem.
Further, when the number of turns of the exciting coil is increased to increase the drive energy that can be generated by the exciting coil, there arises a problem that the exciting coil becomes larger, that is, the actuator becomes larger.

In addition, when the electromagnetic actuator described in Patent Document 1 is upgraded to a 100V rated product and used at 200V, the current is doubled and the Joule heat is quadrupled. It was difficult to share the rating with the 200V rating.
When the 100V rating and the 200V rating are shared, redesign is necessary so that heat generation and current-carrying performance are balanced. However, in the redesign, if the current flowing to the excitation coil is reduced to reduce the Joule heat, the magnetomotive force required for driving decreases. From this point also, it is necessary to increase the number of turns of the excitation coil. In other words, there is a problem that the electromagnetic actuator becomes larger.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to effectively utilize all the driving energy generated by the excitation coil used in the actuator and move the mover. An electromagnetic actuator that generates less heat, does not need to be redesigned, prevents an increase in size, and can be shared between different voltage ratings, and an electromagnetic relay using the electromagnetic actuator.

  An electromagnetic actuator according to the present invention is made of a magnetic material, and includes a yoke having a pair of armature portions facing each other and a pair of coil mounting portions facing each other, and an excitation coil mounted on each coil mounting portion. And a mover installed between a pair of armature portions, each armature portion being substantially perpendicular to one surface of the bottom plate portion at both ends in the longitudinal direction of the bottom plate portion. Each of the coil mounting portions is a bottom plate portion, and is formed of columnar protruding portions that protrude substantially vertically from both corners at the upper end of the standing portion and the inner surface of the standing portion. At the both ends in the width direction at the center in the longitudinal direction of the bottom plate part, it is erected substantially perpendicular to one surface of the bottom plate part, and the excitation coils attached to the coil attachment parts are connected in series. The movable element has a longitudinal direction arranged between the standing portions, and The direction is arranged between the two protrusions in each armature part and between each coil mounting part, and is installed in a movable state in the longitudinal direction, and the permanent magnet is placed on one armature part side. One armature part side permanent magnet formed with one armature part side permanent magnet arranged on the other armature part side and the other armature part side permanent magnet arranged on the other armature part side Either the direction of each magnetic pole part or the end of the armature on the side of each armature part so that the direction of the magnetic pole of the other armature part is opposite to the direction of the magnetic pole of the other armature part side permanent magnet Is provided.

  An electromagnetic actuator according to the present invention is made of a magnetic material, and includes a yoke having a pair of armature portions facing each other and a pair of coil mounting portions facing each other, and an excitation coil mounted on each coil mounting portion. And a mover installed between a pair of armature portions, each armature portion being substantially perpendicular to one surface of the bottom plate portion at both ends in the longitudinal direction of the bottom plate portion. Each of the coil mounting portions is a bottom plate portion, and is formed of columnar protruding portions that protrude substantially vertically from both corners at the upper end of the standing portion and the inner surface of the standing portion. At the both ends in the width direction at the center in the longitudinal direction of the bottom plate part, it is erected substantially perpendicular to one surface of the bottom plate part, and the excitation coils attached to the coil attachment parts are connected in series. The movable element has a longitudinal direction arranged between the standing portions, and The direction is arranged between the two protrusions in each armature part and between each coil mounting part, and is installed in a movable state in the longitudinal direction, and the permanent magnet is placed on one armature part side. One armature part side permanent magnet formed with one armature part side permanent magnet arranged on the other armature part side and the other armature part side permanent magnet arranged on the other armature part side Either the direction of each magnetic pole part or the end of the armature on the side of each armature part so that the direction of the magnetic pole of the other armature part is opposite to the direction of the magnetic pole of the other armature part side permanent magnet It is possible to move the mover by effectively using all the driving energy generated by the excitation coil, reduce heat generation, and share between different voltage ratings. It can be done.

It is a perspective schematic diagram which shows the structure of the electromagnetic actuator concerning Embodiment 1 of this invention. In the electromagnetic actuator concerning Embodiment 1 of this invention, it is a figure which shows the state which sent the electric current which generate | occur | produces the magnetic flux which cancels the magnetic flux E to the exciting coil. In the electromagnetic actuator concerning Embodiment 1 of this invention, it is a figure which shows the state in which the needle | mover is contact | abutting to the 2nd armature part. In the electromagnetic actuator concerning Embodiment 1 of this invention, it is a figure which shows the state which sent the electric current which generate | occur | produces the magnetic flux which cancels the magnetic flux H to the exciting coil. It is a front cross-sectional schematic diagram of the conventional electromagnetic actuator. It is a figure explaining the operation mechanism of the conventional electromagnetic actuator. It is a figure explaining the operation | movement mechanism in the case of supplying with electricity simultaneously to two exciting coils in the conventional electromagnetic actuator. It is a figure which shows the relationship between the electric current sent through the exciting coil of the electromagnetic actuator of Embodiment 1 of this invention and the conventional electromagnetic actuator, and the driving force which acts on a needle | mover. It is an upper surface schematic diagram which shows the structure of the electromagnetic actuator concerning Embodiment 2 of this invention. It is an upper surface schematic diagram which shows the structure of the electromagnetic actuator concerning Embodiment 3 of this invention. It is an upper surface schematic diagram which shows the structure of the electromagnetic actuator concerning Embodiment 4 of this invention. It is a disassembled perspective view which shows the internal structure of the electromagnetic relay concerning Embodiment 5 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic perspective view showing the structure of an electromagnetic actuator according to Embodiment 1 of the present invention.
As shown in FIG. 1, the electromagnetic actuator 100 according to the present embodiment is made of a magnetic material, and includes a yoke 10 having a pair of armature portions facing the bottom plate portion 11 and a pair of coil mounting portions 13 facing each other. And an exciting coil mounted on each coil mounting portion 13, a mover 15 made of a magnetic material and installed between the pair of armature portions, and a permanent magnet provided on each of the pair of armature portions. ing.

The armature part is formed so as to stand substantially vertically on one surface of the bottom plate part 11 at both ends in the longitudinal direction of the bottom plate part 11, and one end part side is the first armature part 12a and the other end part. The side is the second armature part 12b.
The first armature portion 12a and the second armature portion 12b are a quadrangular columnar projecting portion 12d projecting substantially vertically from both corners of the standing portion 12c and the upper end portion of the inner surface of the standing portion. And is formed.

Each coil mounting portion 13 is formed so as to stand substantially vertically on one surface of the bottom plate portion 11 at both ends in the width direction at the center portion in the longitudinal direction of the bottom plate portion 11.
The exciting coil includes a first exciting coil 14 a attached to one coil attaching part 13 and a second exciting coil 14 b attached to the other coil attaching part 13.
Moreover, the 1st exciting coil 14a and the 2nd exciting coil 14b are formed by winding a wire around a bobbin, for example, and are similar coils.

The first excitation coil 14 a and the second excitation coil 14 b are connected in series and mounted on the base side of each coil mounting portion 13.
That is, each excitation coil and each coil mounting part form an electromagnet, and the winding direction of each excitation coil 14a, 14b is such that a magnetic flux is generated in the same direction.

  The longitudinal direction of the mover 15 is arranged between the standing part 12c of the first armature part 12a and the standing part 12c of the second armature part 12b, and the width direction thereof is the first direction. It is arranged between each of the two projecting portions 12d of the armature portion 12a, between the two projecting portions 12d of the second armature portion 12b, and between the two coil mounting portions 13, and its longitudinal direction. It is installed in a movable state.

  That is, the movable element 15 has an end surface at one end portion in the longitudinal direction facing the upright portion 12c of the first armature portion 12a and a side surface of the inner surface of the protruding portion 12d of the first armature portion 12a. With the other end in the longitudinal direction facing the upright portion 12c of the second armature portion 12b and the side surface facing the inner surface of the protruding portion 12d of the second armature portion 12b. The side surface at the substantially central portion in the longitudinal direction is opposed to the inner surface side of each coil mounting portion 13.

The permanent magnet includes a first armature part side permanent magnet 16a disposed on the first armature part side and a second armature part side permanent magnet 16b disposed on the second armature part side. Is formed.
In the present embodiment, the first armature portion side permanent magnet 16a is provided in the first armature portion 12a, and the second armature portion side permanent magnet 16b is the second armature portion 12b. Is provided.
The direction of the magnetic pole of the first armature part side permanent magnet 16a with respect to the first armature part 12a and the direction of the magnetic pole of the second armature part side permanent magnet 16b with respect to the second armature part 12b are: It is reversed.

In the present embodiment, the first armature part-side permanent magnet 16a has the S pole as the first armature part 12a side, and the inner surface of the quadrangular columnar protrusion 12d in the first armature part 12a. The second armature part-side permanent magnet 16b has the N pole on the second armature part 12b side, and the inner surface of the quadrangular columnar protrusion 12d in the second armature part 12b. It is joined to.
That is, the permanent magnet is provided at a portion of each protrusion that faces the side surface of the mover 15.

The first armature portion side permanent magnet 16 a and the second armature portion side permanent magnet 16 b are opposed to the side surfaces of both end portions in the longitudinal direction of the mover 15.
Further, a hole (connection rod insertion hole) through which a connecting rod (not shown) for connecting the movable element 15 and a contact electrode (not shown) of the relay is inserted into the standing portion 12c of the first contact portion 12a. 12e) is provided. In addition, a hole through which the mover support rod joined to the mover 15 may be provided in the standing portion 12c of the second armature portion 12b.

Next, the operation mechanism of the electromagnetic actuator 100 of this embodiment will be described.
The state shown in FIG. 1 is a state where no current is passed through the exciting coil, the mover 15 is in contact with the first armature portion 12a, and the magnetic flux E of the first armature portion side permanent magnet 16a. As a result, an attracting force is generated between the mover 15 and the first contact portion 12a, and the contact state is maintained.
In the present embodiment, the magnetic flux E is generated from the first armature part side permanent magnet 16a → the movable element 15 → the standing part 12c of the first armature part 12a → the protruding part 12d of the first armature part 12a → It circulates in order of the 1st armature part side permanent magnet 16a.

FIG. 2 is a diagram showing a state where a current for generating a magnetic flux for canceling the magnetic flux E is supplied to the exciting coil in the electromagnetic actuator according to the first embodiment of the present invention.
FIG. 3 is a diagram showing a state where the mover is in contact with the second armature portion in the electromagnetic actuator according to Embodiment 1 of the present invention.

As shown in FIG. 2, when a current for generating a magnetic flux that cancels the magnetic flux E is passed through the first and second exciting coils 14a and 14b, a gap between the coil mounting portion 13 and the first armature portion 12a is provided. A magnetic flux Fa that circulates and a magnetic flux Ga that circulates between the coil mounting portion 13 and the second armature portion 12b are generated.
In this case, the magnetic flux Fa circulates in the order of the coil mounting part 13 → the bottom plate part 11 → the standing part 12 c of the first armature part 12 a → the movable element 15 → the coil mounting part 13, and the magnetic flux Ga is the coil mounting part 13. → The bottom plate part 11 → the standing part 12c of the second armature part 12b → the movable element 15 → the coil mounting part 13 in this order.

Since the direction of circulation of the magnetic flux Fa is opposite to the direction of circulation of the magnetic flux E, the magnetic flux E of the first armature portion side permanent magnet 16a that attracts and holds the mover 15 to the first armature portion 12a is canceled. The magnetic flux Ga generates a driving force that moves the mover 15 in the direction of the second armature portion 12b.
Next, when the currents of the first and second exciting coils 14a and 14b are increased, the driving force acting on the mover 15 increases as the magnetic flux Ga increases, and the mover 15 becomes the second armature portion. Move to the 12b side.

In the present embodiment, the magnetic flux H generated by the second armature portion side permanent magnet 16b is the second armature portion side permanent magnet 16b → the protruding portion 12d of the second armature portion 12b → the second armature portion. Since the rotating direction of the magnetic flux Ga is the same as that of the magnetic flux Ga, the mover 15 approaches the second armature portion 12b. Even so, the magnetic flux Ga is not weakened by the magnetic flux H of the second armature part side permanent magnet 16b.
That is, the driving force acting on the mover 15 does not decrease but is strengthened on the contrary, and the mover 15 shown in FIG. 3 is in contact with the second armature portion 12b.

  Next, when the currents flowing through the first and second exciting coils 14a and 14b are cut and the magnetic flux Fa and the magnetic flux Ga are extinguished, they are based on the magnetic flux H of the second armature part side permanent magnet 16b. The state in which the mover 15 is in contact with the second armature part 12b shown in FIG. 3 is maintained by the attractive force between the mover 15 and the second armature part 12b.

FIG. 4 is a diagram showing a state where a current for generating a magnetic flux for canceling the magnetic flux H is supplied to the exciting coil in the electromagnetic actuator according to the first embodiment of the present invention.
In the state where the mover 15 is in contact with the second armature portion 12b shown in FIG. 3, the first and second exciting coils 14a and 14b in the electromagnetic actuator 100 generate magnetic flux that cancels the magnetic flux H. When a current is passed, that is, when a current in a direction opposite to the direction in which a current for generating a magnetic flux for canceling the magnetic flux E is passed, the magnetic flux Fb that circulates between the coil mounting portion 13 and the first armature portion 12a. And the magnetic flux Gb which circulates between the coil mounting part 13 and the 2nd armature part 12b generate | occur | produces.

  In this case, as shown in FIG. 4, the magnetic flux Fb circulates in the order of the coil mounting part 13 → the movable element 15 → the standing part 12 c of the first armature part 12 a → the bottom plate part 11 → the coil mounting part 13. Gb circulates in the order of the coil mounting part 13 → the movable element 15 → the standing part 12 c of the second armature part 12 b → the bottom plate part 11 → the coil mounting part 13.

The magnetic flux Gb cancels the magnetic flux H of the second armature portion side permanent magnet 16b that attracts and holds the mover 15 on the second armature portion 12b because the direction of circulation is opposite to the direction of circulation of the magnetic flux H. The magnetic flux Fb generates a driving force that moves the mover 15 in the direction of the first armature portion 12a.
Next, when the currents of the first and second exciting coils 14a and 14b are increased, the driving force acting on the mover 15 increases as the magnetic flux Fb increases, and the mover 15 becomes the first armature portion. Move to the 12a side.

Since the direction of circulation of the magnetic flux E by the first armature part-side permanent magnet 16a is the same as the direction of circulation of the magnetic flux Fb, even if the mover 15 approaches the first armature part 12a, the first contact The magnetic flux Fb is not weakened by the magnetic flux E of the pole-side permanent magnet 16a.
That is, the driving force acting on the mover 15 is not reduced, but is strengthened on the contrary, and the mover 15 shown in FIG. 1 is in contact with the first armature portion 12a.

  In the present embodiment, the first armature part-side permanent magnet 16a has the S pole as the first armature part 12a side, and the inner surface of the quadrangular columnar protrusion 12d in the first armature part 12a. The second armature part-side permanent magnet 16b has the N pole on the second armature part 12b side, and the inner surface of the quadrangular columnar protrusion 12d in the second armature part 12b. Although the N pole of the first armature portion side permanent magnet 16a is set to the first armature portion 12a side, the S pole of the second armature portion side permanent magnet 16b is set to the second pole. You may make it into the armature part 12b side.

  In the electromagnetic actuator 100 according to the present embodiment, both the first exciting coil 14a and the second exciting coil 14b simultaneously have a magnetic flux that cancels the magnetic flux that attracts and holds the mover 15 on the contact portion. A magnetic flux that generates a driving force for moving the mover 15 is generated.

Next, the structure and operation mechanism of a conventional electromagnetic actuator will be shown, and the effect of the electromagnetic actuator of this embodiment will be described by comparing this with the electromagnetic actuator of this embodiment.
FIG. 5 is a schematic front sectional view of a conventional electromagnetic actuator.
As shown in FIG. 5, the conventional electromagnetic actuator 500 includes a first yoke 51 having a base portion 51c that connects between the opposing armature pieces 51a and 51b and the armature pieces 51a and 51b, and the armature piece. Along with the installed bobbin 58 around which two exciting coils 53a and 53b are wound and the mover 55 is inserted, the permanent magnet 56 disposed between the base 51c and the bobbin 58, and the permanent magnet 56 It comprises a second yoke 57 that forms a magnetic circuit.

FIG. 6 is a diagram for explaining an operation mechanism of a conventional electromagnetic actuator.
The state shown in FIG. 6 is a state in which the mover 55 is in contact with one armature piece 51a.
In this state, when a current is passed through the other exciting coil 53b, a magnetic flux A that circulates in the direction of the mover 55 → the other armature piece 51b → the base portion 51c → the one armature piece 51a → the mover 55 is generated. To do. This magnetic flux A cancels the magnetic flux B generated by the permanent magnet 56 and circulating in the direction of the permanent magnet 56 → second yoke 57 → mover 55 → one armature piece 51a → base portion 51c → permanent magnet 56. The attracting force between the mover 55 and the one armature piece 51a generated by the magnetic flux B is removed.

Next, when the current flowing through the other exciting coil 53b is increased, the current flows in the direction of the base portion 51c → the permanent magnet 56 → the second yoke 57 → the movable element 55 → the other armature piece 51b → the base portion 51c. The magnetic flux D increases, and the driving force that moves the mover 55 in the direction of the other armature piece 51b due to the magnetic flux D increases.
That is, the mover 55 moves to the other armature piece 51b by the removal of the adsorption force between the mover 55 and the one armature piece 51a by the magnetic flux A and the driving force acting on the mover 55 by the magnetic flux D. To do.

Further, in order to move the mover 55 from the state of being in contact with the other armature piece 51b to the one armature piece 51a, a current is passed through the exciting coil 53a on one side, and the same operation mechanism is used. Done.
That is, in the conventional electromagnetic actuator 500, two exciting coils are separately energized, and the mover 55 is moved by the action of only one exciting coil.

FIG. 7 is a diagram for explaining an operation mechanism in the case of energizing two exciting coils simultaneously in a conventional electromagnetic actuator.
If the two exciting coils 53a and 53b are energized simultaneously with the movable element 55 in contact with one armature piece 51a shown in FIG. 7, the magnetic flux A by the other exciting coil 53b and the one exciting current Magnetic flux generated by the permanent magnet 56 by the coil 53a and the magnetic flux C circulating in the order of the base portion 51c → one armature piece 51a → mover 55 → second yoke 57 → permanent magnet 56 → base portion 51c. Cancel B.
That is, in order to cancel the magnetic flux B that holds the mover 55 in contact with the one armature piece 51a, the magnetomotive force is twice as effective as when only one energizing coil is energized. Therefore, the holding force can be canceled even if the current flowing through the exciting coil is halved.

  However, when the currents flowing through the two exciting coils 53a and 53b are increased, the magnetic flux D generated by the other exciting coil 53b acting as a driving force on the mover 55 and the magnetic flux C generated by the one exciting coil 53a. Both increase. The magnetic flux C generates a driving force that moves the mover 55 in the direction of the one armature piece 51a.

Therefore, the movable element 55 has a balance between a driving force for moving the movable element 55 by the magnetic flux D in the direction of the other armature piece 51b and a driving force for moving the movable element 55 by the magnetic flux C in the direction of the one armature piece 51a. As a result, the mover 55 stops moving.
That is, in order to move the mover 55 in the direction of the other armature piece 51b, it is necessary to cancel the magnetic flux B by the permanent magnet 56 and then stop energization to the one side excitation coil 53a. When the coil is energized, the mover 55 cannot be moved.

The conventional electromagnetic actuator 500 is provided with two exciting coils. However, the two exciting coils cannot be simultaneously actuated to drive the mover, and are separately actuated. The drive energy that can be generated cannot be used effectively.
In addition, when the conventional electromagnetic actuator 500 is shared between the 100V rating and the 200V rating and a voltage of 200V is applied, a current twice as much as that in the case of using at 100V flows, and the heat generation due to Joule heat greatly increases. .

  On the other hand, the electromagnetic actuator 100 according to the present embodiment includes two exciting coils for both the magnetic flux that cancels the magnetic flux that attracts and holds the mover 15 on the armature portion and the magnetic flux that generates the driving force that moves the mover 15. At the same time, since it can be generated, the driving energy that can be generated by the exciting coil can be used effectively.

That is, the electromagnetic actuator 100 according to the present embodiment can reduce the current flowing through the exciting coil that generates the driving force necessary to move the mover 15, and therefore can suppress the generation of Joule heat.
In addition, since the drive energy that can be generated by the exciting coil is sufficient, it is not necessary to increase the number of turns of the exciting coil more than necessary, and the size of the exciting coil, that is, the size of the actuator can be prevented.

Next, the electromagnetic actuator of this embodiment and the driving force characteristics at the start of operation were examined using electromagnetic field simulation.
FIG. 8 is a diagram showing the relationship between the current flowing through the exciting coil and the driving force acting on the mover of the electromagnetic actuator according to Embodiment 1 of the present invention and the conventional electromagnetic actuator.
In FIG. 8, the values of current and driving force are standardized based on the current and driving force of the conventional electromagnetic actuator 500 in use, and the negative value in driving force indicates the holding force of the mover. Yes.
In FIG. 8, a broken line S indicates a change in the driving force of the conventional electromagnetic actuator 500, and a broken line T indicates a change in the driving force of the electromagnetic actuator 100 of the present embodiment.

As shown in FIG. 8, when no current is passed through the exciting coil, a holding force acts on the mover, and the driving force has a negative value.
In the electromagnetic actuator 100 of the present embodiment, even when the current of the exciting coil is 0.33, the driving force is 1.1, which is more than the driving force when using the conventional electromagnetic actuator.
However, in the conventional electromagnetic actuator 500, when the current of the exciting coil is 0.33, the driving force is -0.135 and the holding force is applied, and the driving force is not applied.

That is, the electromagnetic actuator 100 according to the present embodiment allows a driving force equivalent to that of the conventional electromagnetic actuator 500 to be obtained by passing about 1/3 of the current through the exciting coil, and effectively uses the driving energy that can be generated by the exciting coil. It can be used for.
In addition, since the current flowing to the exciting coil can be reduced to 1/3, the heat generated by the Joule heat generated in the exciting coil can be reduced to about 1/9 that of the conventional electromagnetic actuator 500, thereby saving energy while ensuring a large heat generation suppressing effect. It can be achieved.

  In the electromagnetic actuator 100 of the present embodiment, for example, the resistance of each excitation coil is set to be the same as the resistance Z of one excitation coil (referred to as a conventional excitation coil) of a conventional electromagnetic actuator rated at 100V, When used at a rating of 100 V, the current Ia flowing through each of the exciting coils connected in series in this case is Ia = 100 / 2Z = 50 / Z, and the current Is flowing through one conventional exciting coil is = 100 / The driving force generated by one excitation coil of the present embodiment is reduced to half of Z, but the two excitation coils simultaneously generate the driving force, so that the conventional excitation coil has a current of 100 / Z. It becomes the same as the generated driving force, and the required driving force can be obtained. Moreover, the Joule heat generation is considerably reduced.

When this electromagnetic actuator 100 is used at a rating of 200 V, the current Ib flowing through each of the excitation coils connected in series in this case is Ib = 200 / 2Z = 100 / Z, and 100 V is applied to the conventional excitation coil. This is the same as the current when applied, and no increase in Joule heat occurs, but the driving force increases.
That is, the electromagnetic actuator of the present embodiment can be shared between the 100V rating and the 200V rating without redesign.

Further, in the electromagnetic actuator 100 of the present embodiment, the magnetic flux of the first armature portion side permanent magnet 16 a and the magnetic flux of the second armature portion side permanent magnet 16 b are linked from each side of the mover 15. Thus, the suction force in the width direction generated in the mover 15 can be canceled, the eccentricity of the mover 15 is prevented, and a stable contact state with each armature portion can be ensured.
Further, the magnetic flux path of each permanent magnet 16a, 16b and the magnetic flux path of each excitation coil 14a, 14b can be separated, and no extra magnetic flux is linked to each permanent magnet 16a, 16b, so each permanent magnet 16a, 16b. Can be prevented.

In the electromagnetic actuator 100 of the present embodiment, a connecting rod connected to the contact electrode of the relay may be connected to the mover 15 and a contact pressure spring (not shown) may be provided in the middle of the connecting rod.
For example, the contact pressure spring to be installed is brought into a compressed state when the movable element 15 is brought into contact with the first armature portion 12a and a relay contact connected to the connecting rod is brought into contact with the movable element 15. It is adjusted so that it will be in the extended state when it is brought into contact with the pole portion 12b and the relay contact connected to the connecting rod is disconnected.

That is, the force from the contact pressure spring acts in the opposite direction of the force that attracts and holds the mover 15 that is in contact with the contact portions 12a and 12b.
When the contact pressure spring is installed in this way, the mover 15 can be moved by canceling the differential force between the holding force acting on the mover 15 by the permanent magnet and the force from the contact pressure spring. The current flowing through the can be further reduced.

  In the present embodiment, the projecting portion 12d formed on the first armature portion 12a and the second armature portion 12b has a quadrangular columnar shape, but is a columnar shape and is a portion facing the side surface of the mover 15. As long as a permanent magnet can be installed, it is not limited to a quadrangular prism shape.

Embodiment 2. FIG.
FIG. 9 is a schematic top view showing the structure of the electromagnetic actuator according to Embodiment 2 of the present invention.
FIG. 9 shows the side of the yoke 10 where the mover 15 is installed.
As shown in FIG. 9, in the electromagnetic actuator 200 of the present embodiment, the first armature part-side permanent magnet 16a has a first armature part with its south pole facing the first armature part 12a. The second armature part is joined to the front end surface of the quadrangular columnar protrusion 12d in 12a, and the second armature part-side permanent magnet 16b has the north pole as the second armature part 12b side. The electromagnetic actuator 100 is the same as that of the electromagnetic actuator 100 of the first embodiment except that it is joined to the tip surface of the quadrangular columnar protrusion 12d in 12b.

In the present embodiment, the first armature portion-side permanent magnet 16a has the S pole as the first armature portion 12a side, and the tip surface of the quadrangular columnar protrusion 12d in the first armature portion 12a. The second armature part-side permanent magnet 16b has its N pole on the second armature part 12b side, and the tip surface of the quadrangular columnar projection 12d in the second armature part 12b. Although the N pole of the first armature portion side permanent magnet 16a is set to the first armature portion 12a side, the S pole of the second armature portion side permanent magnet 16b is set to the second pole. You may make it into the armature part 12b side.
Also in the present embodiment, the projecting portion 12d formed on the first armature portion 12a and the second armature portion 12b is a quadrangular columnar shape, but if the permanent magnet can be installed on the tip end surface, the quadrangular columnar shape can be obtained. It is not limited to a columnar shape.

  In the electromagnetic actuator 200 of the present embodiment, the magnetic flux E of the first armature part side permanent magnet 16a, the magnetic flux H of the second armature part side permanent magnet 16b, and the magnetic flux generated by the respective excitation coils 14a and 14b. Is the same as that in the electromagnetic actuator 100 of the first embodiment. Therefore, the operation mechanism of the electromagnetic actuator 200 of the present embodiment is the same as that of the electromagnetic actuator 100 of the first embodiment. Have.

In addition, in the present embodiment, the permanent magnet is joined to the front end surface of the quadrangular columnar projection in each armature portion, and since there is a space in front of the exposed surface of each permanent magnet, it is not magnetized. Post-magnetization is possible in which the magnet is magnetized after joining.
That is, since assembly using magnets that are not magnetized is possible, handling of the magnets is facilitated, and assembly of the electromagnetic actuator is improved.

Embodiment 3 FIG.
FIG. 10 is a schematic top view showing the structure of the electromagnetic actuator according to Embodiment 3 of the present invention.
FIG. 10 shows the side of the yoke 10 where the mover 15 is installed.
As shown in FIG. 10, in the electromagnetic actuator 300 of the present embodiment, the first armature portion side permanent magnet 16a and the second armature portion side permanent magnet 16b are in an annular shape, and the first contact The pole-side permanent magnet 16a is installed in a circular groove formed on the surface facing the mover 15 in the standing portion 12c of the first contact pole part 12a with the side facing the mover 15 as the S pole. The second armature part side permanent magnet 16b is formed on the surface facing the mover 15 in the standing portion 12c of the second armature part 12b with the side facing the mover 15 being the N pole. It is the same as that of the electromagnetic actuator 100 of Embodiment 1 except having installed in the groove | channel of this.

Examples of the method of installing each permanent magnet in the groove formed in the standing portion 12c include press-fitting and bonding with an adhesive.
In the present embodiment, the first armature part side permanent magnet 16a is a surface facing the mover 15 in the standing portion 12c of the first armature part 12a, with the side facing the mover 15 being the S pole. The second armature part-side permanent magnet 16b is disposed in a circular groove formed on the armature, and the second armature part-side permanent magnet 16b has an N pole on the side facing the armature 15, and the mover in the standing part 12c of the second armature part 12b. 15 is installed in a circular groove formed on the surface facing 15, and the side facing the mover 15 of the first armature portion side permanent magnet 16 a is set to the N pole, and the second armature portion The side facing the mover 15 of the side permanent magnet 16b may be an S pole.

  In the electromagnetic actuator 300 of the present embodiment, the magnetic flux E of the first armature part side permanent magnet 16a, the magnetic flux H of the second armature part side permanent magnet 16b, and the magnetic flux generated by the respective excitation coils 14a and 14b. Is the same as that in the electromagnetic actuator 100 of the first embodiment. Therefore, the electromagnetic actuator 300 of the present embodiment has the same operation effect as that of the electromagnetic actuator 100 of the first embodiment. Have.

In addition, in the present embodiment, the permanent magnet is composed of one first armature portion side permanent magnet 16a and one second armature portion side permanent magnet 16b. The number can be reduced, and the cost of the electromagnetic actuator can be reduced.
Also in the present embodiment, the projecting portions 12d formed on the first armature portion 12a and the second armature portion 12b have a quadrangular columnar shape, but are not limited to a quadrangular columnar shape as long as the columnar shape.

Embodiment 4 FIG.
FIG. 11 is a schematic top view showing the structure of the electromagnetic actuator according to Embodiment 4 of the present invention.
FIG. 11 shows the side of the yoke 10 where the mover 15 is installed.
As shown in FIG. 11, in the electromagnetic actuator 400 of the present embodiment, the first armature part-side permanent magnet 16 a has the first pole in the mover 15 with the south pole of the first armature part 12 a side. The second armature part side permanent magnet 16b is connected to the side surface of the end part side of the armature part side of the second armature part side, and the second armature part side permanent magnet 16b faces the second armature part 12b side. The electromagnetic actuator 100 is the same as that of the electromagnetic actuator 100 of the first embodiment except that it is joined to the side surface of the pole portion side end.

  In the present embodiment, the first armature part side permanent magnet 16a is joined to the side surface of the end of the first armature part side of the mover 15 with the south pole of the first armature part 12a side. The second armature part side permanent magnet 16b is bonded to the side surface of the end of the second armature part side of the mover 15 with the north pole of the second armature part 12b side. However, the N pole of the first armature portion side permanent magnet 16a is set to the first armature portion 12a side, and the S pole of the second armature portion side permanent magnet 16b is set to the second armature portion 12b. It may be on the side.

  In the electromagnetic actuator 400 of the present embodiment, the magnetic flux E of the first armature portion side permanent magnet 16a and the magnetic flux H of the second armature portion side permanent magnet 16b, and the magnetic flux generated by the respective excitation coils 14a and 14b, Is the same as that in the electromagnetic actuator 100 of the first embodiment. Therefore, the electromagnetic actuator 400 of the present embodiment has the same operation effect as that of the electromagnetic actuator 100 of the first embodiment. Have.

In the present embodiment, the permanent magnet is provided on the side surface of each armature portion side end portion of the mover 15, but is not limited to the side surface as long as it is an end portion of each armature portion side of the mover 15.
Also in the present embodiment, the projecting portion 12d formed on the first armature portion 12a and the second armature portion 12b has a quadrangular columnar shape, but has a columnar shape and a permanent magnet provided on the mover. If the opposing part is a plane, it is not limited to a quadrangular prism shape.

Embodiment 5 FIG.
FIG. 12 is an exploded perspective view showing the internal structure of the electromagnetic relay according to the fifth embodiment of the present invention.
As shown in FIG. 12, the electromagnetic relay 60 of the present embodiment includes an electromagnetic actuator 9, a first case 5, a second case 6 that is press-fitted into the first case 5, and a cover 7. A first fixed contact 1 attached as an external terminal of the electromagnetic relay 60, a first movable contact 2 that forms an open / close circuit with the first fixed contact 1, and a second fixed contact The contact 3 is composed of the second fixed contact 3 and a second movable contact 4 forming an open / close circuit. The cover 7 is attached by cover screws 8.

In the electromagnetic relay 60 of the present embodiment, the electromagnetic actuator of any one of the first to fourth embodiments is used as the electromagnetic actuator 9, which is excellent in electricity utilization efficiency, generates less heat, and prevents an increase in size. In addition, the electromagnetic relay can be shared between a 100V rating and a 200V rating.
It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  The electromagnetic actuator according to the present invention has high electricity utilization efficiency, little heat generation, and can be shared between the 100V rating and the 200V rating, and is used for a power distribution device that is small and excellent in efficiency.

1 first fixed contact, 2 first movable contact, 3 second fixed contact,
4 second movable contact, 5 first case, 6 second case, 7 cover,
8 cover screw, 9 electromagnetic actuator, 10 yoke, 11 bottom plate,
12a 1st contact part, 12b 2nd contact part, 12c standing part, 12d protrusion part,
12e Connecting rod insertion hole, 13 coil mounting portion, 14a first exciting coil,
14b 2nd exciting coil, 15 mover, 16a 1st armature part side permanent magnet,
16b 2nd armature part side permanent magnet, 51 1st yoke, 51a armature piece,
51b armature piece, 51c base part, 53a exciting coil, 53b exciting coil,
55 mover, 57 second yoke, 58 bobbin, 60 electromagnetic relay,
100, 200, 300, 400, 500 Electromagnetic actuator.

Claims (8)

A yoke made of a magnetic material and having a pair of armature portions facing the bottom plate portion and a pair of coil mounting portions facing each other, an excitation coil mounted on each of the coil mounting portions, and a magnetic material, With a mover installed between
Each of the armature parts is erected substantially perpendicularly to one surface of the bottom plate part at both ends in the longitudinal direction of the bottom plate part, and both the standing part and the upper end part of the inner surface of the standing part Are formed with columnar protrusions protruding substantially vertically from the corners of the
Each of the coil mounting portions is erected substantially perpendicularly to one surface of the bottom plate portion at both ends in the width direction at the center portion in the longitudinal direction of the bottom plate portion,
Each excitation coil mounted on each coil mounting part is connected in series,
The movable element has a longitudinal direction disposed between the standing portions, and a width direction disposed between the two protruding portions and the coil mounting portions of the armature portions, It is installed in a movable state in the longitudinal direction,
The permanent magnet is formed of one armature portion side permanent magnet disposed on one armature portion side and the other armature portion side permanent magnet disposed on the other armature portion side, and one contact The direction of the magnetic pole of the one permanent magnet side permanent magnet with respect to the pole portion and the direction of the magnetic pole of the other permanent magnet side permanent magnet with respect to the other armature portion are opposite to each other. Or the electromagnetic actuator provided in either of each armature part side edge part of the said needle | mover.   The electromagnetic actuator according to claim 1, wherein the permanent magnet is provided in a portion of each projecting portion facing a side surface of the mover.   The electromagnetic actuator according to claim 1, wherein the permanent magnet is provided on a front end surface of each protrusion.   The electromagnetic actuator according to claim 1, wherein the permanent magnet is installed in a groove provided on a surface of each standing portion facing the mover.   The electromagnetic actuator according to claim 1, wherein the permanent magnet is provided on a side surface of each armature portion side end portion of the mover.   A hole is provided in the standing portion, a connecting rod that is inserted through the hole and connected to a contact electrode of a relay is connected to the mover, and a contact pressure spring is provided in the middle of the connecting rod. The electromagnetic actuator according to any one of claims 1 to 5.   When the movable element is in contact with one armature part, the contact pressure spring is in a compressed state, and in the state of contact with the other armature part, the contact pressure spring is in an extended state. The electromagnetic actuator according to claim 6, wherein the electromagnetic actuator is adjusted.   A housing composed of a first case, a second case press-fitted into the first case, and a cover; an electromagnetic actuator installed in the first case; and a first case attached as an external terminal. A first fixed contact, a first movable contact that forms an open / close circuit with the first fixed contact 1, a second fixed contact, and a second that forms an open / close circuit with the second fixed contact An electromagnetic relay comprising a movable contact, wherein the electromagnetic actuator is the electromagnetic actuator according to any one of claims 1 to 7.

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