Driving force lifting device of electromagnetic force driving mechanism and electromagnetic force driving structure

Abstract

The invention provides a driving force lifting device for an electromagnetic force driving mechanism and the electromagnetic force driving mechanism, the driving force lifting device comprises a frame structure and a driving rod, a coil frame and a plurality of high-energy permanent magnet units are arranged in the frame structure, the coil frame is provided with a W-shaped loop structure, and a coil is wound on the coil frame. According to the embodiment of the invention, the through-flow of the electromagnetic force driving mechanism can be reduced or the situation that the electromagnetic force driving mechanism is driven by double systems can be avoided, the output force of the electromagnetic force driving mechanism can be improved through the W-shaped winding coil loop, and the structure of the electromagnetic force driving mechanism is more compact through the arrangement form of rearranging the permanent magnets.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electromagnetic drive devices, and in particular, to a driving force enhancement device and an electromagnetic force driving structure for an electromagnetic force driving mechanism. Background Art

[0002] The voltage level in the power grid is constantly increasing, and a variety of drive mechanisms provide different drive modes to promote the arc extinguishing chamber to achieve different breaking characteristics. The electromagnetic force drive mechanism has the advantages of simple structure, good opening and closing characteristics, high opening and closing speed, large stroke, and strong adaptability. It uses the internal current-carrying conductor (such as an iron core) to move in the magnetic field under the action of the Lorentz force. When the electromagnetic force drive mechanism is in the closing position, the permanent magnet inside it is in a closed loop to provide a closing holding force. There is no mechanical tripping and locking system in the electromagnetic force drive mechanism. When the electromagnetic force drive mechanism is in the opening and closing position, the capacitor passes direct current to the coil. Affected by the magnetic field where the coil is located, the coil in the current generates a Lorentz force greater than the closing holding force, and the mechanism begins to open. At the opening position, the closed loop formed by the permanent magnet provides the opening holding force.

[0003] However, most arc extinguishing chambers currently require a larger driving force, which increases the requirements for the output force of the electromagnetic force driving mechanism. Therefore, it is necessary to improve the control circuit of the electromagnetic force driving mechanism or the structure of the driving mechanism.

[0004] In the past, in order to meet the driving force requirements of the arc extinguishing chamber, the traditional electromagnetic force driving mechanism needed to increase the current size to increase the Lorentz force to achieve high-power driving. However, as a result, the ultra-high current size has strict requirements on power components, and IGBTs with higher current carrying capacity are required to control the current size. In addition, there are also two sets of electromagnetic force driving mechanisms connected in parallel to drive the arc extinguishing chamber. Under this scheme, two sets of control circuits are required to drive the two sets of conductive coils. This scheme has high requirements for the synchronization of the two control systems. If the system synchronization is not good, the slow-running side will cause resistance obstacles to the priority side, making the driving effect worse. Even some schemes adjust the single-break arc extinguishing chamber to a dual-port arc extinguishing chamber, and modify the arc extinguishing chamber structurally to reduce the driving force on the electromagnetic force driving mechanism side. However, its structure is complex, and the electromagnetic force driving mechanism also requires a dual system. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a driving force enhancement device of an electromagnetic force driving mechanism and an electromagnetic force driving structure to solve the above-mentioned problems existing in the prior art.

[0006] In order to solve the above-mentioned technical problems, an embodiment of the present disclosure provides, on the one hand, a driving force enhancing device for an electromagnetic force driving mechanism, wherein the driving force enhancing device comprises a frame structure and a driving rod, wherein a coil frame and a plurality of high-energy permanent magnet units are arranged in the frame structure, wherein the coil frame has a W-shaped loop structure, and a coil is wound on the coil frame.

[0007] In some embodiments, the high-energy permanent magnet unit is disposed along the loop structure of the coil frame.

[0008] In some embodiments, the high-energy permanent magnet unit includes a positive high-energy permanent magnet and a negative high-energy permanent magnet that are arranged opposite to each other.

[0009] In some embodiments, a positive high-energy permanent magnet and a negative high-energy permanent magnet are respectively disposed on both sides of each side of the coil frame.

[0010] In some embodiments, the positive high-energy permanent magnet in each of the high-energy permanent magnet units is arranged on the outside of the coil frame, and the negative high-energy permanent magnet is arranged on the inside of the coil frame.

[0011] In some embodiments, a high-energy permanent magnet unit is disposed on both sides of each side of the coil frame.

[0012] In some embodiments, the coil is connected to a control circuit, and the control circuit is connected to the driving rod.

[0013] Another aspect of an embodiment of the present disclosure provides an electromagnetic force driving mechanism, which includes any one of the driving force enhancing devices described above.

[0014] In some embodiments, the electromagnetic force driving mechanism includes a control device and an execution device connected to each other, and the execution device is connected to the driving force enhancing device.

[0015] In some embodiments, the control device includes at least a voltage boost and current increasing module, a capacitor, and a current passing module.

[0016] The disclosed embodiments can reduce the flow rate of the electromagnetic force drive mechanism or avoid dual-system driving of the electromagnetic force drive mechanism. The output force of the electromagnetic force drive mechanism can be increased through a W-shaped winding coil loop. The electromagnetic force drive mechanism structure can be made more compact by rearranging the arrangement of permanent magnets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of a general electromagnetic force driving mechanism;

[0019] Figure 2 A schematic structural diagram of a driving force enhancement device for an electromagnetic force driving mechanism provided in one embodiment of the present disclosure;

[0020] Figure 3 A schematic structural diagram of a driving force enhancing device for an electromagnetic force driving mechanism provided in another embodiment of the present disclosure.

[0021] Reference numerals:

[0022] 1- Forward high-energy permanent magnet; 2- Coil; 3- Reverse high-energy permanent magnet; 4- Control circuit. DETAILED DESCRIPTION

[0023] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0024] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0026] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0027] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0028] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0029] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0030] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0031] An embodiment of the present disclosure provides a driving force boosting device for an electromagnetic force driving mechanism, wherein the electromagnetic force driving mechanism is used in a circuit breaker, and the electromagnetic force driving mechanism includes a control device and an execution device that are connected to each other, and the execution device is connected to the driving force boosting device in this embodiment, and the control device here includes at least a voltage boosting and current increasing module, a capacitor, and a current passing module.

[0032] like Figure 1 As shown, a general electromagnetic force driving mechanism includes two relatively arranged static iron cores 10, a moving iron core 20 is arranged between the two static iron cores 10, two permanent magnets 30 are arranged inside the static iron cores 10, the two permanent magnets 30 are arranged relatively, and an excitation coil 40 is arranged between the two permanent magnets 30. In addition, the electromagnetic force operating structure also includes a driving rod 50. When the electromagnetic force operating structure is used to open the gate, a reverse current is passed through the excitation coil 40, and the Lorentz force generated by the excitation coil 40 is greater than the closing holding force, thereby starting to open the gate. At the opening position, the closed circuit formed by the permanent magnets 30 provides the opening holding force. The stroke in the above scheme is not limited, and is suitable for circuit breakers with a larger stroke.

[0033] When the circuit breaker is in the closed (open) position, no current flows through the excitation coil 40, and the permanent magnet 30 (the direction of the arrow is the magnetization direction) acts on the static iron core 10 without any mechanical interlock to maintain the closed (open) position. When the energy storage capacitor is discharged, the conductor of the excitation coil 40 with the excitation current is in the parallel magnetic field formed by the permanent magnet 30, and is acted upon by the Lorentz force, and the opening (closing) operation is completed through the moving iron core 20 together with the driving rod 50 fixed thereon.

[0034] like Figure 2As shown, the driving force enhancement device of the embodiment of the present disclosure includes a frame structure and a driving rod, a coil frame and a plurality of high-energy permanent magnet units are arranged in the frame structure, the coil frame has a W-shaped loop structure, a coil 2 is wound on the coil frame, the high-energy permanent magnet unit is arranged along the loop structure of the coil frame, and the high-energy permanent magnet unit includes a positive high-energy permanent magnet 1 and a reverse high-energy permanent magnet 3 that are relatively arranged.

[0035] Furthermore, the coil 2 is arranged between the positive high-energy permanent magnet 1 and the negative high-energy permanent magnet 3 of each of the high-energy permanent magnet units.

[0036] Preferably, the coil frame includes a short side and four long sides, and five high-energy permanent magnet units are arranged along the short side and four long sides of the coil frame, wherein the four high-energy permanent magnet units arranged along the four long sides of the coil frame are arranged in parallel.

[0037] Preferably, in each of the high-energy permanent magnet units, the positive high-energy permanent magnet 1 is arranged on the outside of the coil frame, and the negative high-energy permanent magnet 3 is arranged on the inside of the coil frame.

[0038] like Figure 3 As shown, in another embodiment, two of the high-energy permanent magnet units are symmetrically arranged on both sides of each side of the coil frame. Preferably, the coil frame includes a short side and four long sides, and a total of ten high-energy permanent magnet units are arranged along the inner and outer sides of one short side and four long sides of the coil frame, wherein the eight high-energy permanent magnet units arranged along the four long sides of the coil frame are arranged in parallel.

[0039] The coil frame in this embodiment has a W-shaped loop structure, and the winding coil 2 is a special-shaped winding copper wire, so that the coil magnetic field area in the coil loop can be maximized, thereby improving the motor driving force. Specifically, the use of a W-shaped winding coil loop can, on the one hand, reduce the volume of the driving force enhancement device, maximize the magnetic field coverage range of the energized conductor, and increase the force application area of ​​the Lorentz force, thereby increasing the output of the electromagnetic force driving mechanism, while also avoiding the inconsistency caused by the use of dual-system electromagnetic force parallel drive.

[0040] In addition, the coil 2 is connected to a control circuit 4 , and the control circuit 4 is connected to the driving rod, so that the movement of the driving rod is driven by the control circuit 4 .

[0041] The electromagnetic force driving mechanism utilizes the Lorentz force on the current-carrying conductor in the magnetic field to move. When the mechanism is in the closed position, the high-energy permanent magnet unit forms a closed loop to provide closing holding force without the need for a mechanical tripping and locking system.

[0042] The driving force boosting device of the disclosed embodiment can achieve greater output force and has a compact structure, and can be applied to the arc extinguishing chamber operating mechanism of a high-voltage switch circuit breaker of ultra-high voltage level. The driving force boosting device has the characteristics of simple structure, good opening and closing characteristics, long stroke, and strong adaptability, and can meet the breaking characteristics of different arc extinguishing chambers.

[0043] Among them, unlike the traditional square coil winding loop, the embodiment of the present disclosure adopts a W-shaped coil winding loop, which can expand the range of the coil passing through the magnetic field formed by the arrangement of multiple high-energy permanent magnet units, thereby increasing the magnitude of the Lorentz force generated by the conductive conductor in the magnetic field, so as to achieve an increase in the driving force of the electromagnetic force actuator.

[0044] In addition, the single control loop of the disclosed embodiment has strong stability. Specifically, it can avoid the use of two sets of electromagnetic force operating mechanisms to be pushed in parallel. During the operation of the two sets of electromagnetic force operating mechanisms, the two systems may work differently, and the output of the magnetic mechanism may be out of sync, resulting in the output of the operating mechanism failing to achieve the expected output curve. The disclosed embodiment adopts a single control loop, charges the capacitor after boosting and rectifying, and then uses IGBT to adjust the capacitor discharge current to energize the W-shaped coil to realize the operation of the operating mechanism, and the coil charging and discharging consistency is good.

[0045] In addition, the disclosed embodiment has a compact structure, and compared with the square winding coil loop used in the past, if the overall driving force is to be increased, the winding circumference needs to be lengthened. Therefore, in order to reduce the volume occupied by the structural arrangement, a W-shaped winding loop is adopted to reduce the volume of the electromagnetic force operating mechanism and maximize the use of the magnetic field induction range of the conductive conductor.

[0046] When manufacturing the driving force enhancement device of this embodiment, the coil 2 is first wound into a coil disk on the coil frame with a W-shaped loop structure, and then the coil frame is assembled in the frame structure and assembled with the driving rod, and then the high-energy permanent magnet unit 2 is assembled, wherein the positive high-energy permanent magnet 1 and the reverse high-energy permanent magnet 3 of the NS pole are arranged in a manner such that the Lorentz force generated by the current in the loop of the coil 2 is based on the same direction, and the high-energy permanent magnet unit is fixed by the frame structure, and at the same time, the movement and swinging range of the coil 2 is limited to prevent the coil 2 from touching the high-energy permanent magnet unit during movement and causing sparks, thereby improving the stability of the electromagnetic force driving mechanism.

[0047] The second embodiment of the present disclosure provides an electromagnetic force driving mechanism, which includes the driving force boosting device in any of the above embodiments, wherein the electromagnetic force driving mechanism includes a control device and an execution device connected to each other, and the execution device is connected to the driving force boosting device. The control device here includes at least a boosting and current increasing module, a capacitor, and a flow-through module.

[0048] The disclosed embodiments can reduce the flow rate of the electromagnetic force drive mechanism or avoid dual-system driving of the electromagnetic force drive mechanism. The output force of the electromagnetic force drive mechanism can be increased through a W-shaped winding coil loop. The electromagnetic force drive mechanism structure can be made more compact by rearranging the arrangement of permanent magnets.

[0049] In addition, the features of the embodiments shown in the drawings of the present application or the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0050] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A driving force enhancing device for an electromagnetic force driving mechanism, characterized in that: The driving force enhancement device comprises a frame structure and a driving rod. A coil frame and a plurality of high-energy permanent magnet units are arranged in the frame structure. The coil frame has a W-shaped loop structure, and a coil is wound on the coil frame.

2. The driving force boosting device for an electromagnetic force driving mechanism according to claim 1, characterized in that: The high-energy permanent magnet unit is arranged along the loop structure of the coil frame.

3. The driving force increasing device for an electromagnetic force driving mechanism according to claim 2, characterized in that: The high-energy permanent magnet unit comprises a positive high-energy permanent magnet and a negative high-energy permanent magnet which are arranged opposite to each other.

4. The driving force boosting device for an electromagnetic force driving mechanism according to claim 3, characterized in that: A positive high-energy permanent magnet and a negative high-energy permanent magnet are respectively arranged on both sides of each side of the coil frame.

5. The driving force boosting device for an electromagnetic force driving mechanism according to claim 4, characterized in that: The positive high-energy permanent magnet in each of the high-energy permanent magnet units is arranged on the outside of the coil frame, and the negative high-energy permanent magnet is arranged on the inside of the coil frame.

6. The driving force boosting device for an electromagnetic force driving mechanism according to claim 3, characterized in that: A high-energy permanent magnet unit is respectively arranged on both sides of each side of the coil frame.

7. The driving force boosting device for an electromagnetic force driving mechanism according to claim 2, characterized in that: The coil is connected to a control circuit, and the control circuit is connected to the driving rod.

8. An electromagnetic force driving mechanism, characterized in that: It comprises the driving force enhancing device as described in any one of claims 1 to 7.

9. The electromagnetic force driving mechanism according to claim 8, characterized in that: The electromagnetic force driving mechanism comprises a control device and an execution device which are connected to each other, and the execution device is connected to the driving force increasing device.

10. The electromagnetic force driving mechanism according to claim 9, characterized in that: The control device at least includes a voltage-boosting and current-increasing module, a capacitor and a current-passing module.

Images