A bidirectional rotary bistable permanent magnet operating mechanism

Abstract

The application provides a bidirectional rotation type bistable permanent magnet operating mechanism, which comprises a ring-shaped moving iron core and a cross-shaped static iron core at the central position of the ring-shaped moving iron core; closing permanent magnets are arranged at the closing end portions on both sides of the cross-shaped static iron core, and opening permanent magnets are arranged at the opening end portions; the closing permanent magnets generate tangential magnetic force through a closing magnetic circuit F p1 , and the opening permanent magnets generate tangential magnetic force through an opening magnetic circuit F p2 ; F p1 and F p2 are opposite in direction; the opening coil of the operating mechanism is wound on the vertical arms of the cross-shaped static iron core, and the closing coil is wound on the horizontal arms of the cross-shaped static iron core; the rotation of the moving iron core makes the moving contact and the static contact of the electromagnetic switch engage or separate; the closing state of the operating mechanism is maintained by the magnetic force of the closing permanent magnets, and the opening state is maintained by the magnetic force of the opening permanent magnets; the application only uses the permanent magnets to reliably maintain the closing and opening states, conforms to the development direction of energy saving and low carbon, and can flexibly control the closing and opening speed during the closing and opening process and adjust the action characteristics of the mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch device, and particularly relates to a bidirectional rotary bistable permanent magnet operating mechanism. BACKGROUND

[0002] The operating mechanism is a core component of a circuit breaker, a contactor and other switch electric appliances, and the output action characteristics of the operating mechanism directly affect the switching performance and service life of the whole switch electric appliance. With the rapid development of the electric power industry, especially the vigorous development of direct current transmission, the breaking capacity and reliability of the operating mechanism are increasingly required by the switch electric appliance. The traditional operating mechanism has the defects of long breaking and closing time, complex structure, high holding energy consumption and the like, and is difficult to meet the requirements of fast breaking under fault, low power consumption, reliable holding and flexible control.

[0003] The permanent magnet operating mechanism is an electric appliance mechanism driven by an electromagnet and kept by a permanent magnet. Compared with the pure electromagnetic and spring mechanism, the permanent magnet operating mechanism combines the advantages of the electromagnet and the permanent magnet, has the advantages of simple structure, few components, high reliability, fast action speed and low holding energy consumption, and thus has become a research hotspot in recent years. In the working process of the traditional direct-acting bistable permanent magnet mechanism, the magnetic force in the breaking direction is generated by the cooperation of the electromagnetic field and the permanent magnetic field, the breaking speed is accelerated, and the breaking capacity is improved. However, the direct-acting bistable permanent magnet mechanism has a working dead zone at the third unbalanced stable state due to the shared magnetic circuit of the breaking and closing coils. Only when the moving iron core passes the dead zone position, the exciting current can be increased to the maximum to improve the breaking speed. Before that, if the exciting current is blindly increased, the speed of the moving iron core will be reduced, and the moving iron core may even be re-closed, which restricts the further improvement of the breaking speed and the reliability of the working process.

[0004] In addition, the operating mechanism based on the electromagnetic repulsive force technology in the medium and high voltage field has a significantly improved breaking speed compared with the traditional electromagnetic and permanent magnet operating mechanism, but has defects such as low driving efficiency, large transient current and difficult buffer control, and is difficult to be miniaturized and accurately controlled, which restricts its application in the low voltage field. SUMMARY

[0005] The present application provides a bidirectional rotary bistable permanent magnet operating mechanism, which generates a bidirectional controllable electromagnetic force by using the principle of magnetic resistance torque, cooperates with a permanent magnet, and realizes flexible and fast control of the breaking and closing action characteristics. The breaking and closing states do not need to be powered to the coil, and the reliable holding of the breaking and closing states is realized only by the permanent magnet, which meets the development direction of energy saving and low carbon. The bidirectional rotary bistable permanent magnet operating mechanism has independent breaking and closing magnetic circuits, and thus does not have the mutual coupling and working dead zone of the breaking and closing magnetic circuits. The breaking and closing process of the bidirectional rotary bistable permanent magnet operating mechanism can be controlled by controlling the synthesized vector magnetic force of the coil and the permanent magnet, flexibly controlling the breaking and closing speed, and adjusting the action characteristics of the mechanism.

[0006] The present application adopts the following technical scheme.

[0007] A bidirectional rotary bistable permanent magnet operating mechanism for opening and closing of an electromagnetic switch, the operating mechanism comprising a ring-shaped moving iron core and a cross-shaped static iron core at the center of the ring-shaped moving iron core; a closing permanent magnet is arranged at the closing end of the cross-shaped static iron core, and an opening permanent magnet is arranged at the opening end of the cross-shaped static iron core; the closing permanent magnet generates a tangential magnetic force through a closing magnetic circuit F p1 , and the opening permanent magnet generates a tangential magnetic force through an opening magnetic circuit F p2 ; F p1 and F p2 are in opposite directions;

[0008] The opening coil of the operating mechanism is wound around the vertical arms of the cross-shaped static iron core, and the closing coil is wound around the horizontal arms of the cross-shaped static iron core; the two closing teeth of the moving iron core are adjacent to the two ends of the horizontal arms of the static iron core, and the two opening teeth of the moving iron core are adjacent to the two ends of the vertical arms of the static iron core;

[0009] The moving contact of the electromagnetic switch is arranged at the insulating non-magnetic rotating disc; the moving contact of the electromagnetic switch is adjacent to the static contact of the electromagnetic switch, the moving iron core is fixedly connected to the insulating non-magnetic rotating disc, and when the moving iron core rotates, it drives the insulating non-magnetic rotating disc to rotate synchronously, so that the moving contact and the static contact of the electromagnetic switch are engaged or separated;

[0010] The electromagnetic switch comprises an insulating non-magnetic fixed frame, and the pin-shaped part of the insulating non-magnetic rotating disc is slidably arranged in the arc-shaped limiting slot of the insulating non-magnetic fixed frame, so as to be fixed and limited;

[0011] The closing state of the operating mechanism is maintained by the magnetic force of the closing permanent magnet, and the opening state is maintained by the magnetic force of the opening permanent magnet.

[0012] When the closing coil of the static iron core is energized, the magnetic lines thereof drive the moving iron core to rotate to perform the opening or closing operation, and the moving iron core keeps the total magnetic resistance between the upper side and the right side of the static iron core and the total magnetic resistance between the lower side and the left side of the static iron core unchanged through the rotating action, so as to avoid the coupling between the opening coil and the closing coil, and avoid the formation of a working dead zone in the working process.

[0013] F p1 The direction is along the counterclockwise tangential direction; F p2 The direction is along the clockwise tangential direction;

[0014] When the closing operation is performed, the moving iron core rotates in the counterclockwise direction; the closing coil and the opening coil are electrified but the current directions are opposite during the closing operation; in the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the same direction as the permanent magnetic field generated by the closing end permanent magnet, which has a magnetizing effect on the permanent magnetic field and accelerates the increase of the magnetic chain of the closing magnetic circuit; in the opening magnetic circuit, the electromagnetic field generated by the opening coil is in the opposite direction to the permanent magnetic field generated by the opening end permanent magnet, which has a demagnetizing effect on the permanent magnetic field and accelerates the decay of the magnetic chain of the opening magnetic circuit to rapidly weaken the opening holding force; when F e1 + F p1 is greater than F e2 + F p2 , the moving iron core is driven and starts to rotate in the counterclockwise direction, driving the moving contact to realize the closing operation;

[0015] When the opening operation is performed, the moving iron core rotates in the clockwise direction; the closing coil and the opening coil are electrified but the current directions are opposite during the opening operation; in the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the opposite direction to the permanent magnetic field generated by the closing end permanent magnet, which has a demagnetizing effect on the permanent magnetic field and accelerates the decay of the magnetic chain of the closing magnetic circuit to rapidly weaken the closing holding force; when F e2 + F p2 is greater than F e1 + F p1 , the moving iron core is driven and rotates in the clockwise direction, driving the moving contact to realize the opening operation.

[0016] When the closing operation is performed, the closing coil is supplied with a forward current and the opening coil is supplied with a reverse current; when the opening operation is performed, the opening coil is supplied with a forward current and the closing coil is supplied with a reverse current.

[0017] When the electromagnetic switch keeps the opening state, neither the opening coil nor the closing coil is electrified, the opening air gap is approximately zero and much smaller than the closing air gap, the magnetic resistance of the opening magnetic circuit is much smaller than that of the closing magnetic circuit, the magnetic field is mainly distributed in the opening magnetic circuit, so that F p2 and F p1 the resultant vector magnetic force acts on the moving iron core in the clockwise direction, and the arc-shaped limiting groove limits the moving iron core to reliably keep it in the opening position.

[0018] When the electromagnetic switch keeps the closing state, neither the opening coil nor the closing coil is electrified, the closing tooth portion of the moving iron core and the closing end portion of the cross-shaped static iron core are in contact, the closing air gap is approximately zero and much smaller than the opening air gap, the magnetic field is mainly distributed in the closing magnetic circuit, so that Fp1 Greater than F p2 + F f The combined force acts on the moving iron core in a counterclockwise tangential direction, and the arc-shaped limiting groove limits the moving iron core so that it is reliably kept in the closed position.

[0019] The internal moving components of the electromagnetic switch include an annular moving iron core that is connected and fixed to two insulated non-magnetic rotating disks by an arc-shaped limiting groove of an insulated non-magnetic frame, and a moving contact that is fixed between the two insulated non-magnetic rotating disks by a bracket.

[0020] The closing end of the cross-shaped stationary iron core is wound with a coil to form a closing coil, and the opening end of the cross-shaped stationary iron core is wound with a coil to form an opening coil. The cross-shaped stationary iron core and the internal moving components are fixed to the two insulating non-magnetic frames by fasteners; the stationary contact is fixed between the two insulating non-magnetic frames by a bracket.

[0021] The moving contact and the stationary contact work together to form a rotating double-break contact system.

[0022] The advantages of this invention are: the opening and closing of the circuit breaker is achieved entirely by permanent magnets, eliminating the need to energize the coils, which aligns with the energy-saving and low-carbon development trend. During the opening and closing process, the excitation state of the opening and closing coils can be flexibly controlled, in conjunction with the permanent magnets, to control the combined vector flux linkage and magnetic force of the opening and closing magnetic circuits, thereby controlling the opening and closing speed of the moving iron core and adjusting the mechanism's operating characteristics. Compared to traditional direct-acting bistable permanent magnet operating mechanisms, its opening and closing magnetic circuits are independent of each other, eliminating the magnetic circuit dead zone. Attached Figure Description

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Appendix Figure 1a This is a three-dimensional schematic diagram of the operating mechanism (internal motion component) of the electromagnetic switch described in this invention;

[0025] Appendix Figure 1b This is an exploded schematic diagram of the operating component (internal moving assembly) of the electromagnetic switch described in this invention;

[0026] Appendix Figure 2a This is a three-dimensional schematic diagram of the electromagnetic switch described in this invention;

[0027] Appendix Figure 2b This is an exploded schematic diagram of the electromagnetic switch described in this invention;

[0028] Appendix Figure 3 This is a schematic diagram of the operating mechanism of the electromagnetic switch described in this invention during the open-stop holding condition;

[0029] AppendixFigure 4 This is a schematic diagram of the magnetic field lines distribution of the permanent magnet in the open-holding condition of the electromagnetic switch described in this invention;

[0030] Appendix Figure 5 This is a schematic diagram of the electromagnetic switch described in this invention during the closing process;

[0031] Appendix Figure 6 This is a schematic diagram of the magnetic field distribution of the electromagnetic switch described in this invention during the closing process;

[0032] Appendix Figure 7 This is a schematic diagram of the electromagnetic switch described in this invention in the closed-holding condition;

[0033] Appendix Figure 8 This is a schematic diagram of the magnetic field distribution of the electromagnetic switch described in this invention during the closed-holding operation.

[0034] Appendix Figure 9 This is a schematic diagram of the electromagnetic switch described in this invention during tripping;

[0035] Appendix Figure 10 This is a schematic diagram of the magnetic field distribution of the electromagnetic switch described in this invention during the opening process;

[0036] In the diagram: 1-Fastener; 2-Insulated non-magnetic turntable; 3-Moving iron core; 4-Cross-shaped stationary iron core; 5-Opening coil; 6-Closing coil; 7-Moving contact; 8-Stationary contact; 9-Closing permanent magnet;

[0037] 10-Permanent magnet for circuit breaking; 11-Insulated non-magnetic fixed frame; 12-Arc-shaped limiting groove; 13-Pendant-shaped component. Detailed Implementation

[0038] As shown in the figure, a bidirectional rotary bistable permanent magnet operating mechanism is used for the opening and closing operation of an electromagnetic switch. The operating mechanism includes an annular moving iron core 3 and a cross-shaped stationary iron core 4 at the center of the annular moving iron core. Closing permanent magnets 9 are provided at the closing ends on both sides of the cross-shaped stationary iron core, and opening permanent magnets 10 are provided at the opening ends. The permanent magnets at the closing ends generate tangential magnetic force through the closing magnetic circuit. F p1 The permanent magnet at the opening end generates tangential magnetic force through the opening magnetic circuit. F p2 ; F p1 and F p2 The opposite direction;

[0039] The tripping coil 5 of the operating mechanism is wound around the vertical arm of the cross-shaped stationary iron core, and the closing coil 6 is wound around the horizontal arm of the cross-shaped stationary iron core; the two closing teeth of the moving iron core are close to the two ends of the horizontal arm of the stationary iron core, and the two tripping teeth of the moving iron core are close to the two ends of the vertical arm of the stationary iron core.

[0040] The moving contact 7 of the electromagnetic switch is located at the insulated non-magnetic rotating disk 2; the moving contact of the electromagnetic switch is close to the stationary contact 8 of the electromagnetic switch, the moving iron core is fixedly connected to the insulated non-magnetic rotating disk, and when the moving iron core rotates, it drives the insulated non-magnetic rotating disk to rotate synchronously, so that the moving contact of the electromagnetic switch engages or disengages from the stationary contact.

[0041] The electromagnetic switch includes an insulated non-magnetic fixed frame 11, and the bolt-shaped part 13 of the insulated non-magnetic turntable is slidably placed in the arc-shaped limiting groove 12 of the insulated non-magnetic fixed frame for fixing and limiting.

[0042] The operating mechanism is maintained in the closed state by the magnetic force of the closed permanent magnet, and in the open state by the magnetic force of the open permanent magnet.

[0043] When the closing coil of the stationary iron core is energized, its magnetic lines of force drive the moving iron core to rotate to perform the opening or closing operation. The rotating action of the moving iron core keeps the total magnetic resistance between the upper and right sides of the stationary iron core and the total magnetic resistance between the lower and left sides of the stationary iron core unchanged, so as to avoid the coupling of the magnetic circuits between the opening and closing coils and avoid the formation of a dead zone during operation.

[0044] F p1 The direction is along the counterclockwise tangential direction; F p2 The direction is along the clockwise tangential direction;

[0045] When the closing operation is performed, the moving iron core rotates counterclockwise; during the closing operation, both the closing coil and the opening coil are energized, but the current directions are opposite; in the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the same direction as the permanent magnetic field generated by the permanent magnet at the closing end, which magnetizes the permanent magnet's magnetic field and accelerates the increase of the magnetic flux in the closing magnetic circuit; in the opening magnetic circuit, the electromagnetic field generated by the opening coil is in the opposite direction to the permanent magnetic field generated by the permanent magnet at the opening end, which demagnetizes the permanent magnetic field and accelerates the decay of the magnetic flux in the opening magnetic circuit to rapidly weaken the opening holding force; when F e1 + F p1 Greater than F e2 + F p2 At this time, the moving iron core is driven and begins to rotate counterclockwise, which drives the moving contact to achieve the closing operation;

[0046] When the tripping operation is performed, the moving iron core rotates clockwise. During the tripping operation, both the closing coil and the tripping coil are energized, but the current directions are opposite. In the closing magnetic circuit, the electromagnetic field generated by the closing coil is opposite in direction to the permanent magnetic field generated by the permanent magnet at the closing end, which demagnetizes the permanent magnetic field, accelerates the attenuation of the magnetic flux in the closing magnetic circuit, and rapidly weakens the closing holding force.F e2 + F p2 greater than F e1 + F p1 When the electromagnetic switch is in the on state, the dynamic iron core is driven to rotate in the clockwise direction, and the dynamic contact is driven to realize the on operation.

[0047] When the on operation is performed, the on coil is supplied with a forward current, and the off coil is supplied with a reverse current; when the off operation is performed, the off coil is supplied with a forward current, and the on coil is supplied with a reverse current.

[0048] When the electromagnetic switch is in the off state, neither the off coil nor the on coil is supplied with electricity, the off air gap is approximately zero and much smaller than the on air gap, the magnetic resistance of the off magnetic circuit is much smaller than that of the on magnetic circuit, the magnetic field is mainly distributed in the off magnetic circuit, the dynamic iron core is driven to rotate in the counterclockwise direction, and the dynamic contact is driven to realize the off operation. F p2 and F p1 The resultant vector magnetic force of the dynamic iron core and the cross-shaped static iron core acts on the dynamic iron core in the clockwise direction, and the arc-shaped limiting groove limits the dynamic iron core to reliably keep in the on position.

[0049] When the electromagnetic switch is in the on state, neither the off coil nor the on coil is supplied with electricity, the on tooth portion of the dynamic iron core and the on end portion of the cross-shaped static iron core are in contact, the on air gap is approximately zero and much smaller than the off air gap, the magnetic field is mainly distributed in the on magnetic circuit, the dynamic iron core is driven to rotate in the clockwise direction, and the dynamic contact is driven to realize the on operation. F p1 greater than F p2 + F f The resultant force acts on the dynamic iron core in the counterclockwise tangential direction, and the arc-shaped limiting groove limits the dynamic iron core to reliably keep in the off position.

[0050] The internal moving assembly of the electromagnetic switch comprises an annular dynamic iron core connected and fixed with the pegs of the two pieces of insulating non-magnetic frames through the arc-shaped limiting grooves of the insulating non-magnetic frames, and further comprises a dynamic contact fixed between the two pieces of insulating non-magnetic frames by a support;

[0051] The on end portion of the cross-shaped static iron core is wound with a coil to form an on coil, the off end portion of the cross-shaped static iron core is wound with a coil to form an off coil, the cross-shaped static iron core and the internal moving assembly are fixed at the two pieces of insulating non-magnetic frames by a fastener, and a static contact is fixed between the two pieces of insulating non-magnetic frames by a support;

[0052] The dynamic contact and the static contact cooperate to form a rotating double-break contact system.

[0053] Embodiment:

[0054] The pegs in this example are bolts, such asFigure 1a and Figure 1b As shown: permanent magnets are embedded in the opening and closing ends of the cross-shaped stationary iron core, and coils are wound on the opening and closing ends to form the opening coil and closing coil, respectively. The rotating moving iron core is fixed together with two insulated non-magnetic discs, and the moving contact is fixed between the two discs by a bracket, forming the internal moving parts of the switch.

[0055] The overall three-dimensional structure and exploded view of the bidirectional rotary bistable permanent magnet switch are as follows: Figure 2a and Figure 2b As shown: the cross-shaped stationary iron core and the internal moving parts are fixed to the two external insulating non-magnetic frames by fasteners 1 (bolts). The stationary contact is fixed between the two insulating non-magnetic frames by a bracket to form a complete switch. The moving contact and the stationary contact cooperate to form a rotating double-break contact system.

[0056] The magnetic field generated by the permanent magnet at the trip end travels along the trip magnetic circuit, producing a magnetic force in the clockwise direction. F p2 The magnetic field generated by the permanent magnet at the closing end travels along the closing magnetic circuit, producing a magnetic force in the counterclockwise direction. F p1 The schematic diagram of the tripped and held state is as follows: Figure 3 As shown, at this time, neither the opening nor closing coils are energized, and the air gap for opening is almost zero, much smaller than that for closing. Therefore, the magnetic reluctance of the opening magnetic circuit is much smaller than that of the closing magnetic circuit, and the magnetic field mainly flows through the opening magnetic circuit (magnetic field distribution is as shown). Figure 4 As shown), make F p2 and F p1 The combined vector magnetic force is clockwise, and the moving iron core is reliably kept in the open position due to the effect of the limiting groove.

[0057] When performing a closing operation, a forward current is supplied to the closing coil, and a reverse current is supplied to the opening coil (e.g., ...). Figure 5 In the coil, the cross and dot indicate the direction of current (cross means current is perpendicular to the paper and inwards, dot means current is perpendicular to the paper and outwards). The closing coil generates an electromagnetic force in a counterclockwise tangential direction. F e1 The trip coil generates an electromagnetic force in a clockwise tangential direction. F e2 In the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the same direction as the permanent magnetic field generated by the permanent magnet at the closing end, thus magnetizing the permanent magnet and accelerating the increase of the magnetic flux in the closing magnetic circuit. In the opening magnetic circuit, the electromagnetic field generated by the opening coil is in the opposite direction to the permanent magnetic field generated by the permanent magnet at the opening end, thus demagnetizing the permanent magnetic field, accelerating the decay of the magnetic flux in the opening magnetic circuit, and rapidly weakening the opening holding force. When F e1 + Fp1 Greater than F e2 + F p2 When the resultant force rotates counterclockwise, the moving iron core is activated and begins to rotate counterclockwise, driving the contacts to achieve the closing operation. During the entire closing operation, as the moving iron core rotates, the air gaps of the upper and lower opening magnetic circuits and the left and right closing magnetic circuits increase and decrease, respectively. Therefore, the total magnetic reluctance of the upper and right sides and the lower and left sides remains unchanged, and no effective "magnetic reluctance torque" is formed. This makes the opening and closing magnetic circuits independent of each other, without coupling. Therefore, compared with the traditional direct-acting bistable permanent magnet mechanism, its working process has no dead zone.

[0058] like Figure 7 The diagram shows the closed holding state, with neither the opening nor closing coils energized. At this time, the closing teeth of the moving iron core and the closing end of the cross-shaped stationary iron core are in contact. The air gap during closing is nearly zero, much smaller than the air gap during opening. The magnetic field mainly flows through the closing magnetic circuit (magnetic field distribution as shown). Figure 8 As shown), make F p1 Greater than F p2 + F f The combined force is along the counterclockwise tangential direction, and due to the effect of the limiting groove, the moving iron core is reliably kept in the closed position.

[0059] When performing a tripping operation, a forward current is supplied to the tripping coil, and a reverse current is supplied to the closing coil (e.g., ...). Figure 9 In the coil, the cross and dot indicate the direction of current (cross indicates current perpendicular to the paper and inwards, dot indicates current perpendicular to the paper and outwards). The trip coil generates an electromagnetic force in a clockwise tangential direction. F e2 The closing coil generates an electromagnetic force in a counterclockwise tangential direction. F e1 In the opening magnetic circuit, the electromagnetic field generated by the opening coil is in the same direction as the permanent magnetic field generated by the permanent magnet at the opening end, thus magnetizing the permanent magnet and accelerating the increase of the magnetic flux in the opening magnetic circuit. In the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the opposite direction to the permanent magnetic field generated by the permanent magnet at the closing end, thus demagnetizing the permanent magnetic field and accelerating the decay of the magnetic flux in the closing magnetic circuit, rapidly weakening the closing holding force. F e2 + F p2 Greater than F e1 + F p1When the magnetic force is along the clockwise direction, the moving iron core rotates along the clockwise direction, and drives the contact to realize the opening operation. Similar to the closing process, in the entire opening operation process, the opening and closing magnetic circuits are also independent of each other, and there is no coupling, so there is no working dead zone in the opening process.

Claims

1. A bidirectional rotary bistable permanent magnet operating mechanism for opening and closing operation of an electromagnetic switch, characterized by: The operating mechanism comprises a ring-shaped moving iron core and a cross-shaped static iron core at the center of the ring-shaped moving iron core; the closing end of the cross-shaped static iron core is provided with a closing permanent magnet, and the opening end is provided with an opening permanent magnet; the closing permanent magnet generates a tangential magnetic force through a closing magnetic circuit F p1 , and the opening permanent magnet generates a tangential magnetic force through an opening magnetic circuit F p2 ; F p1 and F p2 are opposite in direction; The closing coil of the operating mechanism is wound around the vertical arms of the cross-shaped static core, and the closing coil is wound around the horizontal arms of the cross-shaped static core; the two closing teeth of the moving core are adjacent to the two ends of the horizontal arms of the static core, and the two opening teeth of the moving core are adjacent to the two ends of the vertical arms of the static core; The moving contact of the electromagnetic switch is arranged at the insulating non-magnetic rotating disc; the moving contact of the electromagnetic switch is adjacent to the static contact of the electromagnetic switch, the moving core is fixedly connected with the insulating non-magnetic rotating disc, and the moving core drives the insulating non-magnetic rotating disc to rotate synchronously when rotating, so that the moving contact of the electromagnetic switch is engaged or separated from the static contact of the electromagnetic switch; The electromagnetic switch comprises an insulating non-magnetic fixed frame, and the pin-shaped members of the insulating non-magnetic rotating discs are slidably arranged in the arc-shaped limiting grooves of the insulating non-magnetic fixed frame, so as to be fixed and limited; The closing state of the operating mechanism is maintained by the magnetic force of the closing permanent magnet, and the opening state is maintained by the magnetic force of the opening permanent magnet; F p1 the direction is along a counterclockwise tangential direction; F p2 the direction is along a counterclockwise tangential direction; F e1 to produce an electromagnetic force in a counterclockwise tangential direction for the closing coil; F e2 to produce an electromagnetic force in a clockwise tangential direction for the opening coil; When the closing operation is performed, the moving iron core rotates in the counterclockwise direction; the closing coil and the opening coil are electrified but the current directions are opposite when the closing operation is performed; in the closing magnetic circuit, the electromagnetic field generated by the closing coil is in the same direction as the permanent magnetic field generated by the permanent magnet at the closing end, which has a magnetizing effect on the permanent magnetic field and accelerates the increase of the magnetic flux linkage of the closing magnetic circuit; in the opening magnetic circuit, the electromagnetic field generated by the opening coil is opposite to the permanent magnetic field generated by the permanent magnet at the opening end, which has a demagnetizing effect on the permanent magnetic field and accelerates the decay of the magnetic flux linkage of the opening magnetic circuit to rapidly weaken the opening holding force; when F e1 + F p1 greater than F e2 + F p2 the moving iron core is driven and starts to rotate in the counterclockwise direction, which drives the moving contact to realize the closing operation; When the opening operation is performed, the moving iron core rotates in the clockwise direction, and the closing coil and the opening coil are electrified but the current directions are opposite during the opening operation; in the closing magnetic circuit, the electromagnetic field generated by the closing coil is opposite to the direction of the permanent magnetic field generated by the closing end permanent magnet, which demagnetizes the permanent magnetic field, accelerates the decay of the closing magnetic circuit flux linkage, and rapidly weakens the closing holding force; when F e2 + F p2 greater than F e1 + F p1 , the moving iron core is driven and rotates in the clockwise direction, driving the moving contact to realize the opening operation.

2. A bidirectional rotary bistable permanent magnet operating mechanism according to claim 1, characterized in that: When the closing coil of the static core is energized, the magnetic lines thereof drive the moving core to rotate to perform the opening or closing operation, and the moving core keeps the total magnetic resistance between the upper side and the right side of the static core and the total magnetic resistance between the lower side and the left side of the static core unchanged through the rotating action, so as to avoid the coupling of the magnetic circuits between the opening coil and the closing coil and avoid the formation of a working dead zone in the working process.

3. The bidirectional rotary bistable permanent magnet operating mechanism according to claim 1, characterized in that: When the closing operation is performed, the closing coil is supplied with a forward current, and the opening coil is supplied with a reverse current; when the opening operation is performed, the opening coil is supplied with a forward current, and the closing coil is supplied with a reverse current.

4. The bidirectional rotary bistable permanent magnet operating mechanism according to claim 1, characterized in that: The internal moving assembly of the electromagnetic switch comprises an annular moving core connected and fixed with the pin-shaped members of the two insulating non-magnetic rotating discs through the arc-shaped limiting grooves of the insulating non-magnetic frame, and further comprises a moving contact fixed between the two insulating non-magnetic rotating discs by a support; The closing end of the cross-shaped static core is wound with a coil to form a closing coil, the opening end of the cross-shaped static core is wound with a coil to form an opening coil, the cross-shaped static core and the internal moving assembly are fixed at the two insulating non-magnetic frames by fasteners; and the static contact is fixed between the two insulating non-magnetic frames by a support; The moving contact and the static contact cooperate to form a rotating double-breakpoint contact system.

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