JP2012216451A - Electromagnetic operation device for switching device, and driving circuit for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold an attraction state after closure of a switch such as an electromagnetic contactor and the like with certainty.SOLUTION: An electromagnetic operation device comprises: an iron core 18; an input coil CC wound around the iron core and generating a magnetic flux when energized; a holding coil HC wound around the iron core and generating a magnetic flux when energized; a yoke 20 surrounding the input coil and the holding coil; a rotation shaft 11 driving a movable contact point of a switch at rotation; and a magnetic movable element 12 whose one end is attached to the rotation shaft and whose free end forms a passage of the magnetic flux by the iron core and the yoke. The movable element is attracted to an end surface of the yoke by energizing the input coil, and the rotation shaft rotates. The movable contact point contacts with a fixed contact point of the switch. This contact state is held by energizing the input coil and holding coil.

Description

  The present invention relates to an electromagnetic operating device of a switchgear having a closing coil and a holding coil, and a drive circuit thereof.

  An electromagnetic operation mechanism used for opening and closing a switch such as an electromagnetic contactor performs insertion of the electromagnetic contactor or the like by pivoting of a mover attracted when an electromagnetic magnet is energized. (See JP-A-8-316028)

JP-A-8-316028 (FIG. 1 and explanation thereof)

  The electromagnetic operation mechanism used to open and close the magnetic contactor and other switches opens the electromagnetic contactor by the pivot of the mover that is attracted when the electromagnetic magnet is energized. It is necessary to securely hold the magnet in an attracted state.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reliably maintain a suction state after a switch such as an electromagnetic contactor is turned on.

An electromagnetic operating device for a switchgear according to the present invention includes an iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, and the closing coil A coil surrounding the coil and the holding coil, a rotating shaft for driving the movable contact of the switch when rotating, and one end attached to the rotating shaft and a free end forming the magnetic flux path with the iron core and the yoke An electromagnetic operating device for an opening / closing device having a magnetic mover,
By energizing the closing coil, the movable element is attracted to the end surface of the yoke, the rotating shaft rotates, and the movable contact contacts the fixed contact of the switch. It is held by energizing the holding coil.
Further, the drive circuit of the electromagnetic operating device according to the present invention includes an iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, A yoke that surrounds the closing coil and the holding coil, a rotating shaft that drives the movable contact of the switch when rotating, and one end of which is attached to the rotating shaft, and a free end that is the iron core and the yoke. A drive circuit for driving an electromagnetic operating device of a switchgear having a magnetic mover forming
AC / DC conversion circuit that converts AC to DC,
A first switch that connects the closing coil to the DC output end of the AC / DC converter circuit during the closing operation, and the mover attracts the end surface of the yoke by energizing the closing coil by the closing operation of the first switch. A second switch that operates when the rotating shaft rotates and connects the holding coil to a DC output terminal of the AC / DC converter circuit;
With
When the closing coil is energized by connection of the closing coil to the DC output end of the AC / DC conversion circuit, the movable element is attracted to the end surface of the yoke, the rotating shaft rotates, and the movable contact is Abutting against the fixed contact of the switch, this abutting state is maintained by energizing the closing coil and the holding coil by connecting the closing coil and the holding coil to the DC output terminal of the AC / DC conversion circuit. is there.

The present invention relates to an iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, and a yoke that surrounds the closing coil and the holding coil. A rotating shaft for driving the movable contact of the switch when rotating, and a magnetic movable element whose one end is attached to the rotating shaft and whose free end forms the magnetic flux path with the iron core and the yoke. An electromagnetic operating device for a switching device, wherein the movable element is attracted to an end surface of the yoke by energizing the closing coil, the rotating shaft is rotated, and the movable contact comes into contact with the fixed contact of the switch. Since the contact state is held by energizing the closing coil and the holding coil, the suction state after the opening of the switch can be reliably held, and the holding coil can be downsized. There is a result.
The present invention also provides an iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, the closing coil, and the holding coil. An enclosing yoke, a rotating shaft for driving a movable contact of a switch when rotating, and a magnetic mover having one end attached to the rotating shaft and a free end forming the magnetic flux path with the iron core and the yoke. A drive circuit for driving an electromagnetic operating device of the switchgear comprising: an AC / DC converter circuit for converting AC to DC; a first switch for connecting the input coil to a DC output terminal of the AC / DC converter circuit during input operation; And when the movable element is attracted to the end surface of the yoke by energizing the making coil by the making operation of the first switch and the turning shaft is turned, the direct current of the AC / DC conversion circuit is operated. A second switch for connecting the holding coil to a force end, and the input coil is energized by connection of the input coil to a DC output end of the AC / DC converter circuit, whereby the mover is connected to an end surface of the yoke. When the suction shaft is sucked, the movable contact abuts the fixed contact of the switch, and this contact state is connected to the DC output terminal of the AC / DC converter circuit by connecting the closing coil and the holding coil. Because it is held by energizing the closing coil and the holding coil by means of a microcomputer, it is not easily affected by noise like a function realization measure using a microcomputer, and the suction state after the opening of the switch is reliably held with a simple circuit. In addition, there is an effect that the holding coil can be downsized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a front view which shows an example of the electromagnetic operating device of an opening / closing apparatus. It is a figure which shows Embodiment 1 of this invention, and is side surface sectional drawing seen from the arrow II-II of FIG. It is a figure which shows Embodiment 1 of this invention, and is a partial side sectional view of the principal part seen from the arrow III-III of FIG. It is a figure which shows Embodiment 1 of this invention, and is a partial view which shows the electromagnetic magnet part of FIG. It is a figure which shows Embodiment 1 of this invention, and is a connection diagram which shows an example of the drive circuit of an electromagnetic operating device. FIG. 6 is a diagram illustrating the first embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in the process of turning on the drive circuit of FIG. 5; FIG. 6 is a diagram illustrating the first embodiment of the present invention, and is an operation explanatory diagram illustrating the current path in the on-holding state of the drive circuit of FIG. 5. FIG. 6 is a diagram showing the first embodiment of the present invention, and is an operation tying chart illustrating the operation timing of each of the throwing-in and throwing-in portions in the drive circuit of FIG. 5. It is a figure which shows Embodiment 2 of this invention, and is a connection diagram which shows an example of the drive circuit of a latch type electromagnetic operating device. FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in the process of turning on the drive circuit of FIG. 9; FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in an operation process of a pumping prevention circuit when the drive circuit of FIG. 9 is turned on. FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in the pumping prevention circuit of the drive circuit of FIG. 9. FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation tying chart illustrating the operation timing of each part when the drive circuit of FIG. 9 is turned on. FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in a trip operation process of the drive circuit of FIG. 9; FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation explanatory diagram illustrating a current path in a CTD (capacitor tripping device) trip operation process of the drive circuit of FIG. 9; FIG. 10 is a diagram illustrating the second embodiment of the present invention, and is an operation tying chart illustrating the operation timing of each part during the trip operation of the drive circuit of FIG. 9;

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS.

First, the whole structure of an electromagnetic contactor is demonstrated with FIG.1 and FIG.2. A vacuum valve 1 containing a fixed contact 1a and a movable contact 1b is housed in the insulating frame 2 for three phases. The fixed contact 1 a is connected to a fixed rod 1 c, and the fixed rod 1 c is led out of the container of the vacuum valve 1 and connected to the fixed side terminal 3 and is fixed to the insulating frame 2.
On the other hand, the movable contact 1b is connected to a movable rod 1d that can move in the contact / separation direction of the contact. The movable rod 1d is led out to the outside and connected to the movable terminal 5 via the flexible conductor 4, and is connected to one of the insulating rods 6 coaxial with the movable rod 1d. On the other side of the insulating rod 6, a contact pressure spring 7 that applies contact pressure between both contacts is mounted.

The main circuit portion 8 (see FIG. 1) is constituted by the above-described portions up to the vacuum valve 1, the insulating frame 2, the fixed side terminal 3, the flexible conductor 4, the movable side terminal 5, the insulating rod 6, and the contact pressure spring 7. . The main circuit portion 8 is bolted and fixed to the base 9 via the insulating frame 2.
The material of the base 9 is a metal plate, for example, formed by pressing a steel plate.
Moreover, the shape of each component of the main circuit unit 8 shows an example, and is not limited to the shape shown in the figure.

The distal end side of the insulating rod 6 is connected to one end of the opening / closing lever 10 via a contact pressure spring 7. The other end of the opening / closing lever 10 is fixed to a rotating shaft 11, and by rotating about the axis of the rotating shaft 11 as a fulcrum, the insulating rod 6 and the movable rod 1 d connected thereto are connected via the contact pressure spring 7. Are reciprocated in the contact / separation direction of both contacts 1a, 1b.
Further, a movable element 12 that rotates in conjunction with the opening / closing lever 10 is fixed to the rotation shaft 11. An electromagnetic magnet 13 for attracting the mover 12 by electromagnetic force and rotating the rotation shaft 11 in the direction in which the contact is inserted is disposed on the base 9 so as to face the mover 12. Details of the electromagnetic magnet 13 and the structure of the support portion of the rotating shaft 11 will be described later.
The base 9 is provided with a stopper 14 having an L-shaped cross section in order to restrict the movement of the mover 12 in the direction opposite to the suction direction.

  The rotating shaft 11 is provided with a contact opening lever 15 (see FIG. 1) separately from the opening / closing lever 10 for driving the insulating rod 6, and an opening spring 16 is opposed to the lever 15. Is provided. Details of this portion will be described with reference to FIG. 3 is a cross-sectional view taken along line III-III in FIG. One end of the lever 15 is fixed to the rotating shaft 11 with a bolt or the like, and the open spring 16 is arranged so that the other end is biased by the open spring 16 in a direction opposite to the suction direction of the mover 12. ing. The side of the open spring 16 opposite to the lever 15 side is supported and fixed to the base 9. Even if the lever 15 is pressed by the release spring 16 and the rotation shaft 11 rotates, the lever 15 does not rotate more than a predetermined angle due to the action of the stopper 14 described above.

The opening / closing lever 10, the rotary shaft 11, the mover 12, the electromagnetic magnet 13, the stopper 14, the lever 15, and the opening spring 16 constitute the drive mechanism portion 17 (see FIG. 1) that drives the contacts. Yes. The drive mechanism portion 17 is directly fixed to the base 9 side without passing through the insulating frame 2.
In addition, the shape of each component of the drive mechanism part 17 is not limited to a figure. For example, the lever 15 may be used also as the movable element 12.

  Next, details of the assembly structure of the electromagnetic magnet 13 and the rotating shaft 11 will be described with reference to the cross-sectional view of FIG. 2 and the perspective view of FIG.

As shown in the sectional view of FIG. 2, the electromagnetic magnet 13 has an iron core 18 at the center thereof, and an electromagnetic coil 19 is wound around the iron core 18. The electromagnetic coil 19 includes an inner closing coil CC and an outer holding coil HC concentric with the closing coil CC. The closing coil CC and the holding coil HC are insulated via an inter-coil insulator. .
A yoke 20 is disposed so as to surround three sides of the electromagnetic coil 19, and the yoke 20 and the iron core 18 are integrally fixed by bolts. A mounting foot 20a is provided on the lower side of the yoke 20, and is fixed to the base 9 by bolting or the like.
A bearing support portion 20b for supporting the rotating shaft 11 is provided at the upper portion of the groove-shaped yoke 20 opening side, and the bearing 21 attached to the bearing support portion 20b has a square cross section. A shaft 11 is inserted and supported rotatably.

A movable element 12 is attached to the rotating shaft 11 so as to face the electromagnetic magnet 13, and when the movable element 12 is attracted by operating the electromagnetic magnet 13, the surface of the movable element 12 faces the opening side of the yoke 20. It comes into contact with the surface of the surface with almost no gap.
The opening / closing lever 10 described above is fixed to the mounting hole 11a on the upper surface side of the rotating shaft 11 by bolting or the like. Further, the lever 15 described above is attached to the attachment hole 11b on the side surface side.
In addition, it is positioned so that the rotation axis | shaft 11 may not shift | deviate to an axial direction by setting it as the attaching part of the needle | mover 12 over the substantially full length between the both bearings 21 of the rotation axis | shaft 11. FIG.
The reason why the cross-sectional shape of the rotating shaft 11 is quadrangular is that the mover 12, the opening / closing lever 10, and the lever 15 are easily fixed, but is not necessarily limited to a quadrangular shape.

The operation of the electromagnetic contactor configured as described above will be described.
When the contact of the vacuum valve 1 is open, the yoke 20 and the mover 12 of the electromagnetic magnet 13 are in a state as shown in FIG. When a closing command is issued to the electromagnetic contactor, the electromagnetic coil 19 is excited, a magnetic flux that circulates around the iron core 18, the yoke 20, and the mover 12 is generated, and an attractive force is generated in the electromagnetic magnet 13. With this suction force, the mover 12 is attracted to the yoke 20 and rotates clockwise in FIG. 3 with the rotation shaft 11 as a fulcrum. In conjunction with this, the open / close lever 10 pushes up the insulating rod 6 and the movable rod 1d via the contact pressure spring 7, and the movable contact 1b of the vacuum valve 1 contacts the fixed contact 1a. Further, the contact pressure spring 7 is compressed to a state as shown in FIG. Necessary contact pressure is applied to the contact points of the contact points 1a and 1b by the contact pressure of the contact pressure spring 7. The applied state is maintained by continuing to pass a current through the electromagnetic coil 19. In order to maintain the closing state, the attractive force of the electromagnetic magnet 13 is designed to exceed the sum of the contact pressure of the contact pressure spring 7 and the release force of the release spring 16.

When the current of the electromagnetic coil 19 is interrupted and the excitation is released, the attractive force of the electromagnetic magnet 13 disappears, and the rotating shaft 11 is driven by the force of the contact pressure spring 7 and the force of the release spring 16 pressing the lever 15. 2 is rotated counterclockwise in FIG. 2, the open / close lever 10 is pushed down, and the movable contact 1b is separated from the fixed contact 1a to be in a cut-off state.
At this time, as shown in FIG. 3, the mover 12 is in contact with the stopper 14 so as not to rotate any further.

For this reason, the variation in the gap between the mover 12 and the yoke 20 (or the iron core 18) during assembly is reduced, adjustment is easy without requiring adjustment work such as fine adjustment, and the mover 12 can be assembled with high accuracy. It becomes. Therefore, the gap can be reduced to the minimum, and as a result, the electromagnetic magnet 13 can be miniaturized.
Moreover, since there are few intervening parts on the way, it is suppressed that a gap dimension changes by aging deterioration, wear, etc., and an electromagnetic contactor with stable quality can be provided.
Further, the electromagnetic magnet 13 and the drive mechanism 17 comprising the bearing 21, the rotation shaft 11, the opening / closing lever 10, the lever 15, and the release spring 16 are independent without interposing the insulating frame 2 on the main circuit 8 side. Therefore, the main circuit portion 8 and the drive mechanism portion 17 can be assembled separately and can be adjusted within each unit, so that the assembly is facilitated.

  5-7, the drive circuit of the electromagnetic operating device is composed of diodes D1 to D4, and the AC / DC conversion circuit REC that outputs DC power is connected to an AC power source on the input side, and commands switching on / off of the switch. A first switch SMO that is an artificial operation switch, a second switch LS1 such as a limit switch that detects a rotation position of the rotation shaft 11, a holding coil HC, a closing coil CC, and a bypass circuit BPC , Surge absorbing element ZNR1 to surge absorbing element ZNR4, diode D5, AC / DC converter circuit REC, first switch SMO, second switch LS1, holding coil HC, closing coil CC, bypass circuit BPC, surge absorbing element ZNR1 The surge absorbing element ZNR4 and the diode D5 are connected as illustrated in FIGS.

  The AC / DC converting circuit REC, the bypass circuit BPC, the surge absorbing element ZNR1 to the surge absorbing element ZNR4, and the diode D5 are mounted on a control board indicated by a dotted line.

  A first switch SMO, a second switch LS1, a holding coil HC, and a closing coil CC arranged outside the control board indicated by dotted lines are connected to the AC / DC conversion circuit REC on the control board via the connection terminals. The bypass circuit BPC, the surge absorbing element ZNR1 to the surge absorbing element ZNR4, and the diode D5 are connected by printed wiring on the control board.

  Next, the operation of the drive circuit of the electromagnetic operating device in FIG. 5 will be described with reference to FIGS.

  First, when an input command is issued from the OFF state to the ON state by the first switch SMO, the output (DC power) of the AC / DC conversion circuit REC is supplied to the closing coil CC via the contact b of the ON state of the second switch LS1. ), And a current flows through a path indicated by a thick line in FIG. 6, that is, a path of the diode D2, the first switch SMO, the second switch LS1b, the bypass circuit BPC, the closing coil CC, and the diode D4.

  When the closing coil CC is energized by the drive current flowing through the closing coil CC, the movable contact 1b which is the main contact of the switchgear is also fixed as the main contact, as described above with reference to FIGS. The second switch LS1, which is a position detection switch for detecting the ON position of the movable contact, is operated in parallel with this closing operation, and the b contact of the second switch LS1 is turned ON. The contact a of the second switch LS1 is switched from OFF to ON, and the bypass circuit BPC is de-energized, and the AC / DC conversion circuit REC is connected to the series circuit of the holding coil HC and the closing coil CC as illustrated in FIG. 7 is supplied, and the path indicated by the bold line in FIG. 7, that is, the diode D2, the first switch SMO, the second switch LS1b contact, the holding coil HC, the closing coil CC, and the dashes. Path of Eau D4, in current flows.

  When the holding coil HC is energized by flowing through the holding coil HC and the making coil CC and the energizing of the making coil CC is continued, the making of the movable contact 1b is held by both the holding coil HC and the making coil CC. .

  Since the holding of the movable contact 1b is held by both the holding coil HC and the closing coil CC, the holding contact is more reliably performed, and the holding coil is compared with the case where the holding and holding is performed only by the holding coil HC. HC can be reduced in size and capacity.

  Further, the AC / DC converter circuit REC, the bypass circuit BPC, the surge absorbing element ZNR1 to the surge absorbing element ZNR4, and the diode D5 are mounted on a control board indicated by a dotted line, and are connected to a first switch SMO disposed outside the control board. The switch LS1, the holding coil HC, and the closing coil CC are connected to the AC / DC converter circuit REC, bypass circuit BPC, surge absorbing element ZNR1 to surge absorbing element ZNR4, and diode D5 on the control board via the connection terminals. As a circuit configuration connected by printed wiring, the function of opening and closing the contact of the switchgear is realized by the circuit, so that the function of closing and closing by the S / W application using a microcomputer is realized. As described above, there are no malfunctions affected by noise, and complex measures are taken to prevent malfunctions. You need not even that.

  The breaking operation of pulling the movable contact 1b in the closed state away from the fixed contact 1a is not limited to the automatic cutoff by the protective relay. If the first switch SMO is turned off, the holding coil HC and the closing coil CC are deenergized, and the open spring 16, the movable contact 1b is separated from the fixed contact 1a.

  Since the second switch LS1 is a position detection switch for detecting the ON position of the movable contact, for example, a commercially available switch such as a limit switch, a micro switch, or an optical switch is turned on by a turning-on operation by turning on a turning-on coil CC. If it is provided corresponding to the moving and rotating parts, the aforementioned operation can be realized.

Embodiment 2. FIG.
The second embodiment will be described below with reference to FIGS. 9 to 16 in the case of a drive circuit for a latch type electromagnetic operating device.

  In general, the latch-type electromagnetic operating device uses the attracting force of the permanent magnet for the aforementioned holding operation, and the breaking operation for pulling the movable contact 1b in the closing state from the fixed contact 1a is performed by the trip coil TC. It is done by energization.

  As shown in FIGS. 9 to 12, 14, and 15, the drive circuit of the electromagnetic operating device according to the second embodiment is composed of diodes D1 to D4, and the input side is connected to an AC power source and outputs DC power. A circuit REC, a first switch SMO1 that is an artificial operation switch, a fourth switch SMO2, a third switch LS0 such as a limit switch that is a position detection switch, a second switch LS1, a closing coil CC, a trip coil TC, The surge absorbing element ZNR1 to the surge absorbing element ZNR4, the diode D5 to the diode D9, the auxiliary relay 52X for preventing the pumping operation, the resistor R1 and the resistor R2, and the AC / DC converting circuit REC, the first switch SMO1, the fourth switch SMO2, Third switch LS0, second switch LS1, holding coil HC, closing coil CC, bypass circuit BPC, surge absorbing element ZNR1 to surge absorbing element ZNR4, diode D5 to diode D9, auxiliary relay 52X for preventing pumping operation, resistors R1 and R2, and capacitor tripping power supply devices are shown in FIGS. Are connected as illustrated.

  Next, the operation of the drive circuit of the electromagnetic operating device in FIG. 9 will be described with reference to FIGS.

  First, as shown in FIG. 13, when a turn-on command is issued from the OFF state to the ON state by the first switch SMO1, a closing coil CC current flows in the closing coil CC, and the main contact (the movable contact of the switchgear and On the other hand, the contact b of the second switch LS1 changes from ON to OFF, the contact a of the second switch LS1 changes from OFF to ON, and the pumping prevention auxiliary relay 52X operates and a The contact is changed from OFF to ON, the b contact is changed from ON to OFF, and the switching contact 52X-c is changed from OFF to ON on the a side and from ON to OFF on the b side.

The current path in the turning-on process when the first switch SMO1 is turned on is an example of the path indicated by the thick line in FIG.
Operation process of the pumping prevention circuit for preventing the opening / closing operation (pumping) of the main contact by repeating the alternate energization of the closing coil and the trip coil, which are generated when the first switch SMO1 and the fourth switch SMO2 are turned ON simultaneously by the erroneous operation. The current path in FIG. 11 is a path exemplified by a thick line in FIG.

As shown in FIG. 16, when a switch command is issued from the OFF state to the ON state by the fourth switch SMO2, a trip coil TC current flows through the trip coil TC, and the main contact (the movable contact and the fixed contact of the switchgear). ) Is switched from ON to OFF, the pumping prevention auxiliary relay 52X is de-energized, and its contact a is switched from ON to OFF.
The current path in the trip process by turning on the fourth switch SMO2 is an exemplary path indicated by a thick line in FIG.
Note that the current path in the trip process using the capacitor tripping power supply device is an exemplary path indicated by a thick line in FIG.

1a fixed contact, 1b movable contact,
11 Rotating shaft,
12 Mover,
18 Iron core,
20 York,
BPC bypass circuit,
CC insertion coil,
HC holding coil,
LS1 second switch,
REC AC / DC conversion circuit,
SMO First switch.

Claims (8)

An iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, a yoke surrounding the closing coil and the holding coil, and when rotating A rotary shaft for driving a movable contact of a switch, and an electromagnetic of a switchgear provided with a magnetic movable element whose one end is attached to the rotary shaft and whose free end forms the magnetic flux path with the iron core and the yoke. An operating device,
By energizing the closing coil, the movable element is attracted to the end surface of the yoke, the rotating shaft rotates, and the movable contact contacts the fixed contact of the switch. An electromagnetic operating device of an opening / closing device that is held by energizing the holding coil. In the electromagnetic operating device of the switchgear according to claim 1,
An electromagnetic operating device for an opening / closing device, wherein the holding coil and the holding coil are arranged concentrically. In the electromagnetic operating device of the switchgear according to claim 1,
An electromagnetic operating device for an opening / closing device, wherein the closing coil is disposed inside the holding coil. In the electromagnetic operating device of the switchgear according to claim 2 or claim 3,
The electromagnetic operating device for a switchgear, wherein the closing coil and the holding coil are insulated. An iron core, a closing coil that generates a magnetic flux when energized by being wound around the iron core, a holding coil that generates a magnetic flux when energized by being wound around the iron core, a yoke surrounding the closing coil and the holding coil, and when rotating A rotary shaft for driving a movable contact of a switch, and an electromagnetic of a switchgear provided with a magnetic movable element whose one end is attached to the rotary shaft and whose free end forms the magnetic flux path with the iron core and the yoke. A drive circuit for driving the operating device,
AC / DC conversion circuit that converts AC to DC,
A first switch that connects the closing coil to the DC output end of the AC / DC converter circuit during the closing operation, and the mover attracts the end surface of the yoke by energizing the closing coil by the closing operation of the first switch. A second switch that operates when the rotating shaft rotates and connects the holding coil to a DC output terminal of the AC / DC converter circuit;
With
When the closing coil is energized by connection of the closing coil to the DC output end of the AC / DC conversion circuit, the movable element is attracted to the end surface of the yoke, the rotating shaft rotates, and the movable contact is Electromagnetic operation that contacts the fixed contact of the switch and maintains this contact state by energizing the closing coil and the holding coil by connecting the closing coil and the holding coil to the DC output terminal of the AC / DC converter circuit Device drive circuit. The drive circuit of the electromagnetic operating device according to claim 5, further comprising a bypass circuit that bypasses the holding coil,
At the time of turning on, the energization of the making coil is performed through the bypass circuit,
At the time of the holding, the drive circuit of the electromagnetic operating device is characterized in that the energization to the closing coil and the holding coil is performed by switching from the bypass circuit to the holding coil by the second switch. In the drive circuit of the electromagnetic operating device according to claim 6,
The drive circuit of the electromagnetic operating device, wherein the bypass circuit is deenergized by the switching by the second switch, and the closing coil and the holding coil are connected in series. In the drive circuit of the electromagnetic operating device according to any one of claims 5 to 7,
The drive circuit of the electromagnetic operating device, wherein the first switch is an artificial operation switch, and the second switch is a position detection switch.

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