High-frequency low-voltage capacitor suitable for frequency converter

Abstract

The application relates to the technical field of electrical components, and discloses a high-frequency low-voltage capacitor suitable for a frequency converter, which comprises a base, a supporting plate fixedly connected to the surface of the base, a motor fixedly connected to the top of the supporting plate, filter capacitor bottom terminals fixedly connected to the surface of the base, and a detection mechanism arranged on the surface of the base, wherein the detection mechanism comprises a switching mechanism arranged in the base, the switching mechanism comprises a guide rod one, the outer wall of the guide rod one is fixedly connected with a spring, the other end of the spring is fixedly connected with the outer wall of a synchronous rod one, and the inner wall of the synchronous rod one is fixedly connected with a limiting rod. The switching mechanism is used for switching the filter capacitor, the working temperature of the filter capacitor is reduced, the filter capacitor is prevented from sharply reducing the service life due to the sharp temperature rise in the high-frequency circuit working process, and the risk that the filter capacitor is damaged due to long-time use of the frequency converter and stops working is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electrical components, in particular to a high-frequency low-voltage capacitor suitable for a frequency converter. BACKGROUND

[0002] With the improvement of industrial automation and energy saving demand, as the core equipment of motor speed regulation, the frequency converter gradually becomes an important part of modern industry. The high-frequency low-voltage capacitor can effectively support the stable operation of the frequency converter in the high-frequency switching environment due to its excellent frequency response and low loss characteristics.

[0003] The patent application with the application number CN201811147804.9 discloses a frequency converter filter capacitor capacity control system, which comprises a central control device, a filter reactor, a filter capacitor inductor, a circuit control module, a communication module, a bus network; the central control device is used for detecting the whole system and regulating and controlling each functional module; the central control device comprises a central computer, a power controller and a display; the central computer is installed with system processing software capable of realizing storage of filter capacitor capacity and monitoring of capacitor inductance.

[0004] However, the existing high-frequency low-voltage capacitor of the frequency converter, when performing high-frequency filtering, causes additional energy loss inside the capacitor due to the ripple current passing through the capacitor, which is converted into heat, so that the temperature of the capacitor rises. With the rise of temperature, the dielectric material inside the capacitor is more likely to age, which makes the capacitor more likely to heat and reduces the service life. SUMMARY

[0005] The purpose of the application is to provide a high-frequency low-voltage capacitor suitable for a frequency converter to solve the problems raised in the background.

[0006] To achieve the above purpose, the application provides the following technical scheme: a high-frequency low-voltage capacitor suitable for a frequency converter, comprising a base, the surface of the base is fixedly connected with a supporting plate, the top of the supporting plate is fixedly connected with a motor, the surface of the base is fixedly connected with a filter capacitor bottom terminal, the surface of the base is provided with a detection mechanism, and the high-frequency low-voltage capacitor further comprises:

[0007] The switching mechanism is arranged inside the base, the switching mechanism comprises a guide rod one, the outer wall of the guide rod one is fixedly connected with a spring, the other end of the spring is fixedly connected with the outer wall of a synchronous rod one, the inner wall of the synchronous rod one is fixedly connected with a limiting rod, the bottom of the limiting rod is fixedly connected with a sliding rod, the outer wall of the sliding rod away from the one end of the limiting rod is slidably connected with the sliding groove of the guide block, the outer wall of the guide block is fixedly connected with the outer wall of a connecting rod, the outer wall of the sliding rod is fixedly connected with a magnet one, the lower side of the guide rod one is provided with a switching assembly, the synchronous rod one is made of insulating material, and the synchronous rod one is used for driving the sliding rod to synchronously slide in the sliding groove through the limiting rod, the guide block and the sliding rod are made of conductive material, and the guide block and the sliding rod are used for conducting electricity during capacitive heat switching.

[0008] According to the technical scheme, the detection mechanism comprises a support rod one, the outer wall of the support rod one is fixedly connected with a detection block, the top of the detection block is fixedly connected with a heat conduction plate, the outer wall of the heat conduction plate is provided with a second heat dissipation hole, the outer wall of the heat conduction plate is rotatably connected with a fan through a bearing, the outer wall of the fan is provided with a first heat dissipation hole, and the detection block is used for detecting the heat of the capacitor.

[0009] According to the technical scheme, the switching assembly comprises a gas cylinder, the output end of the gas cylinder is fixedly connected with the outer wall of a synchronous rod two, the outer wall of the synchronous rod two is fixedly connected with a fixed sleeve, the inner wall of the fixed sleeve is fixedly connected with a support rod two, the outer wall of the support rod two is fixedly connected with a magnet two, and the magnet two is used for magnetically attracting the magnet one.

[0010] According to the technical scheme, the outer wall of the support rod two is fixedly connected with a sliding block, the bottom of the sliding block is slidably connected with a guide rod two, the bottom of the guide rod two is fixedly connected with an output rod, and the sliding block is used for continuously conducting electricity of the filter capacitor in the switching process.

[0011] According to the technical scheme, the number of filter capacitors is two groups, the two groups of filter capacitors are symmetrically arranged on the surface of the base with the center line of the support plate as the axis of symmetry, the output end of the motor penetrates the top of the support plate and is fixedly connected with the top of the fan, the number of switching mechanisms is two groups, the two groups of switching mechanisms are symmetrically arranged in the base with the center line of the base as the axis of symmetry, the inner wall of the synchronous rod one is slidably connected with the outer wall of the guide rod one, the inner wall of the connecting rod is fixedly connected with the bottom terminal of the filter capacitor, and the guide rod one is used for guiding the synchronous rod one.

[0012] According to the technical scheme, the number of detection mechanisms is two groups, the two groups of detection mechanisms are symmetrically arranged on the surface of the base with the center line of the support plate as the axis of symmetry, the top of the fan is rotatably connected with the inner wall of the support plate through a bearing, the inner wall of the heat conduction plate is in contact with the outer wall of the filter capacitor, and the heat conduction plate is used for heat conduction of the heat generated by the filter capacitor.

[0013] According to the technical scheme, the magnet two position corresponds to the magnet one position, the support rod two and the fixed sleeve are two groups, the two groups of support rod two and fixed sleeve are symmetrically arranged on the outer wall of the synchronous rod two as the symmetry axis, the support rod two is made of conductive material and is used for conducting electricity during the switching process of the filter capacitor.

[0014] According to the technical scheme, the output rod and the guide rod two are two groups, the two groups of output rod and guide rod two are equidistantly arranged in the inner wall of the base as the rotation axis, the outer wall of the output rod penetrates the inner wall of the base, the bottom of the guide rod two is fixedly connected with the bottom of the inner wall of the base, the output rod is used for being connected with the frequency converter circuit, and the guide rod two is made of conductive material and is used for conducting electricity to the output rod.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] 1. The high-frequency low-voltage capacitor suitable for the frequency converter switches the filter capacitor through the switching mechanism, reduces the working temperature of the filter capacitor, increases the service life of the filter capacitor, prevents the filter capacitor from being damaged due to the sharp increase of the temperature during the working process of the high-frequency circuit, reduces the risk of stopping working caused by the damage of the filter capacitor due to the long-time use of the frequency converter.

[0017] 2. The high-frequency low-voltage capacitor suitable for the frequency converter monitors the temperature of the filter capacitor through the detection mechanism, stably monitors the working temperature of the filter capacitor, increases the service life of the filter capacitor, prevents the filter capacitor from being damaged due to the long-time use of the frequency converter, and keeps the frequency converter working stably for a long time.

[0018] 3. The high-frequency low-voltage capacitor suitable for the frequency converter switches the filter capacitor circuit through the switching assembly, reduces the high-temperature working burden of the filter capacitor, prevents the capacitor from discharging and causing the spark at the moment of switching the circuit, causes damage to the frequency converter circuit, ensures the stable switching of the filter capacitor circuit, and reduces the risk of sparking.

[0019] 4. The high-frequency low-voltage capacitor suitable for the frequency converter quickly cools the filter capacitor through the heat conduction plate, prolongs the working temperature rising time of the filter capacitor, reduces the switching frequency of the filter capacitor, prevents the filter capacitor from being frequently switched due to the high temperature, and improves the energy efficiency of the capacitor. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural schematic diagram of the application;

[0021] Figure 2 The figure is a sectional view of the application Figure One ;

[0022] Figure 3The sectional view of the present application Figure Two ;

[0023] Figure 4 The sectional view of the present application Figure Three ;

[0024] Figure 5 The sectional view of the detection mechanism of the present application

[0025] Figure 6 The structural diagram of the switching mechanism of the present application Figure One ;

[0026] Figure 7 The structural diagram of the switching mechanism of the present application Figure Two ;

[0027] Figure 8 The structural diagram of the switching assembly of the present application.

[0028] In the figure: 1, base; 101, support plate; 102, motor; 103, filter capacitor; 2, detection mechanism; 201, support rod one; 202, fan; 203, heat dissipation hole one; 204, detection block; 205, heat conduction plate; 206, heat dissipation hole two; 3, switching mechanism; 301, guide rod one; 302, spring; 303, synchronous rod one; 304, limiting rod; 305, sliding rod; 306, magnet one; 307, sliding groove; 308, guide block; 309, connecting rod; 4, switching assembly; 401, output rod; 402, guide rod two; 403, sliding block; 404, fixed sleeve; 405, support rod two; 406, magnet two; 407, synchronous rod two; 408, air cylinder. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Embodiment one, please refer to Figures 1-5 The present application provides a technical solution: a high-frequency low-voltage capacitor suitable for a frequency converter, which comprises a base 1, the surface of the base 1 is fixedly connected with a support plate 101, the top of the support plate 101 is fixedly connected with a motor 102, the surface of the base 1 is fixedly connected with a filter capacitor 103 at the bottom terminal, the surface of the base 1 is provided with a detection mechanism 2, and the detection mechanism 2 further comprises:

[0031] The switching mechanism 3 is arranged in the base 1, and the switching mechanism 3 comprises a guide rod one 301, the outer wall of the guide rod one 301 is fixedly connected with a spring 302, the other end of the spring 302 is fixedly connected with the outer wall of a synchronous rod one 303, the inner wall of the synchronous rod one 303 is fixedly connected with a limiting rod 304, the bottom of the limiting rod 304 is fixedly connected with a sliding rod 305, the end of the sliding rod 305 away from the limiting rod 304 is slidably connected with the slot wall of a sliding groove 307 arranged on the outer wall of a guide block 308, the outer wall of the guide block 308 is fixedly connected with the outer wall of a connecting rod 309, the outer wall of the sliding rod 305 is fixedly connected with a magnet one 306, the switching assembly 4 is arranged below the guide rod one 301, the synchronous rod one 303 is made of insulating material, and is used for driving the sliding rod 305 to synchronously slide in the sliding groove 307 through the limiting rod 304, the guide block 308 and the sliding rod 305 are made of conductive material, and are used for conducting electricity when the capacitor is switched, and when the high-frequency low-voltage capacitor suitable for the frequency converter is put into use, the bottom of an output rod 401 is welded on the frequency converter circuit board, after being electrified, the switching assembly 4 is driven by a cylinder 408 to slide to the left, the left filter capacitor 103 is connected to the circuit to filter the current of the frequency converter, the detection block 204 detects the temperature of the filter capacitor 103, when the temperature of the filter capacitor 103 rises, the motor 102 is started to drive the fan 202 to rotate, the temperature of the filter capacitor 103 is reduced through the heat conduction plate 205, when the temperature of the filter capacitor 103 is too high, the cylinder 408 is started to drive the switching assembly 4 to slide to the right, and the filter capacitor 103 is switched, because the magnet two 406 and the magnet one 306 are attracted, at this time, the left filter capacitor 103 will not be disconnected instantaneously, the magnet one 306 slides in the inner wall of the sliding groove 307 through the sliding rod 305, and simultaneously drives the synchronous rod one 303 to compress the spring 302 to synchronously slide on the outer wall of the guide rod one 301, so that the two poles of the filter capacitor 103 synchronously act, the switching assembly 4 slides to the right, the magnet one 306 on the right side is attracted by the magnet two 406, the magnet one 306 drives the synchronous rod one 303 to compress the spring 302 to slide on the outer wall of the guide rod one 301, the magnet one 306 on the right side contacts the outer wall of the magnet two 406, the filter capacitor 103 on the right side is connected to the circuit, and the two filter capacitors 103 are connected in parallel in the circuit, the filter capacitor 103 on the right side is charged, and the filter capacitor 103 on the left side is discharged, when the sliding rod 305 on the left side slides to the end in the sliding groove 307, the sliding rod 305 is limited through the sliding groove 307, the magnet one 306 is away from the outer wall of the magnet two 406, the filter capacitor 103 on the left side is disconnected, the fan 202 continuously rotates to reduce the temperature of the filter capacitor 103 on the left side, until the motor 102 stops working after the detection block 204 detects that the temperature is normal, and the filter capacitor 103 on the right side moves in the opposite direction, and the filter capacitor 103 on the left side continues to filter in the same way as the above steps.

[0032] The filter capacitor 103 is two groups, two groups of filter capacitor 103 is set in the surface of the base 1 with the center line of the support plate 101 as the axis of symmetry, the motor 102 output end through the top of the support plate 101 and the top of the fan 202 fixed connection, switching mechanism 3 is two groups, two groups of switching mechanism 3 is set in the inside of the base 1 with the center line of the base 1 as the axis of symmetry, the inner wall of the synchronous rod one 303 and the outer wall of the guide rod one 301 sliding connection, the inner wall of the connecting rod 309 and the bottom terminal of the filter capacitor 103 fixed connection, the guide rod one 301 is used for guiding the synchronous rod one 303, when the temperature of the filter capacitor 103 is too high, the cylinder 408 starts, drives the switching assembly 4 to slide to the right side in the process of switching the filter capacitor 103, because the magnet two 406 and the magnet one 306 adsorb, at this time, the left filter capacitor 103 will not be disconnected instantly, the magnet one 306 slides in the inner wall of the sliding slot 307 through the sliding rod 305, at the same time, the synchronous rod one 303 is driven by the limiting rod 304 to compress the spring 302 to slide synchronously on the outer wall of the guide rod one 301, so that the filter capacitor 103 two poles move synchronously, through the switching assembly 4 slides to the right side, the magnet one 306 on the right side is attracted by the magnet two 406, the magnet one 306 drives the synchronous rod one 303 to slide on the outer wall of the guide rod one 301, the magnet one 306 on the right side contacts with the outer wall of the magnet two 406, the filter capacitor 103 on the right side is connected to the circuit, the two groups of filter capacitor 103 are connected in parallel in the circuit, at the same time, the filter capacitor 103 on the right side is charged, when the sliding rod 305 on the left side slides to the end in the sliding slot 307, the sliding rod 305 is limited by the sliding slot 307, the magnet one 306 leaves the outer wall of the magnet two 406, the filter capacitor 103 on the left side is disconnected, the fan 202 continues to rotate to cool the filter capacitor 103 on the left side, until the motor 102 stops working after the detection block 204 monitors the normal temperature.

[0033] Example two, based on example one, please refer to Figures 6-7The application provides the technical scheme: the detection mechanism 2 comprises a support rod one 201, the outer wall of the support rod one 201 is fixedly connected with a detection block 204, the top of the detection block 204 is fixedly connected with a heat conduction plate 205, the outer wall of the heat conduction plate 205 is provided with a second heat dissipation hole 206, the outer wall of the heat conduction plate 205 is rotatably connected with a fan 202 through a bearing, the outer wall of the fan 202 is provided with a first heat dissipation hole 203, the detection block 204 is used for detecting the heat of the capacitor, the detection block 204 monitors the temperature of the filter capacitor 103, when the temperature of the filter capacitor 103 rises, the motor 102 starts to drive the fan 202 to rotate, the temperature of the filter capacitor 103 is reduced through the heat conduction plate 205, cold air is directly cooled to the outer wall of the filter capacitor 103 through the first heat dissipation hole 203 and the second heat dissipation hole 206 in the rotating process of the fan 202, meanwhile, the inner wall of the heat conduction plate 205 is cooled to the filter capacitor 103, the cold air entering the second heat dissipation hole 206 through the first heat dissipation hole 203 generates vortex to cool the heat conduction plate 205, so that the temperature of the filter capacitor 103 is prevented from being too high, when the filter capacitor 103 is switched, the motor 102 drives the fan 202 to continuously cool the filter capacitor 103, the detection block 204 continuously monitors the temperature of the filter capacitor 103, and the motor 102 stops working until the temperature of the filter capacitor 103 is normal.

[0034] The detection mechanism 2 is two groups, the two groups of detection mechanisms 2 are symmetrically arranged on the surface of the base 1 with the center line of the support plate 101 as the symmetric axis, the top of the fan 202 is rotatably connected with the inner wall of the support plate 101 through a bearing, the inner wall of the heat conduction plate 205 is in contact with the outer wall of the filter capacitor 103, the heat conduction plate 205 is used for conducting heat generated by the filter capacitor 103, cold air is directly cooled to the outer wall of the filter capacitor 103 through the first heat dissipation hole 203 and the second heat dissipation hole 206 in the rotating process of the fan 202, meanwhile, the inner wall of the heat conduction plate 205 is cooled to the filter capacitor 103, the cold air entering the second heat dissipation hole 206 through the first heat dissipation hole 203 generates vortex to cool the heat conduction plate 205, so that the temperature of the filter capacitor 103 is prevented from being too high.

[0035] In the third embodiment based on the first embodiment and the second embodiment, please refer to Figure 8The application provides the technical scheme that the switching assembly 4 comprises a cylinder 408, the output end of the cylinder 408 is fixedly connected with the outer wall of a synchronous rod two 407, the outer wall of the synchronous rod two 407 is fixedly connected with a fixed sleeve 404, the inner wall of the fixed sleeve 404 is fixedly connected with a supporting rod two 405, the outer wall of the supporting rod two 405 is fixedly connected with a magnet two 406, the magnet two 406 is used for magnetically adsorbing the magnet one 306, when the temperature of the filter capacitor 103 is too high, the cylinder 408 is started, the synchronous rod two 407 is driven to slide to the right side, meanwhile, the sliding block 403 slides on the surface of the guide rod two 402, power failure is prevented, the filter capacitor 103 located on the left side is switched to the right side, because the magnet two 406 and the left magnet one 306 are adsorbed, at the moment, the left filter capacitor 103 will not be disconnected instantaneously, the magnet one 306 drives the sliding rod 305 to slide on the inner wall of the sliding groove 307, meanwhile, the synchronous rod one 303 is driven to compress the spring 302 to slide on the outer wall of the guide rod one 301, so that the filter capacitor 103 is synchronously actuated, the filter capacitor 103 is switched to the right side through the switching assembly 4, the magnet one 306 located on the right side is attracted by the magnet two 406, the magnet one 306 drives the synchronous rod one 303 to compress the spring 302 to slide on the outer wall of the guide rod one 301, the magnet one 306 located on the right side is in contact with the outer wall of the magnet two 406, the filter capacitor 103 located on the right side is connected to the circuit, the two groups of filter capacitors 103 are connected in parallel in the circuit, the filter capacitor 103 on the right side is charged, and the filter capacitor 103 on the left side is discharged, when the sliding rod 305 located on the left side slides to the end in the sliding groove 307, the sliding rod 305 is limited through the sliding groove 307, the magnet one 306 is separated from the outer wall of the magnet two 406, the filter capacitor 103 located on the left side is disconnected, the fan 202 continuously rotates to cool the filter capacitor 103 on the left side, and the motor 102 stops working until the temperature detected by the detection block 204 is normal.

[0036] The outer wall of the supporting rod two 405 is fixedly connected with the sliding block 403, the bottom of the sliding block 403 is slidably connected with the guide rod two 402, the bottom of the guide rod two 402 is fixedly connected with the output rod 401, and the sliding block 403 is used for continuously conducting electricity of the filter capacitor 103 in the switching process, the bottom of the output rod 401 is welded on the frequency converter circuit board, after power-on, the cylinder 408 is started to drive the switching assembly 4 to slide to the left, the filter capacitor 103 on the left side is connected to the circuit to filter the frequency converter current, when the temperature of the filter capacitor 103 is too high, the cylinder 408 is started, the synchronous rod two 407 is driven to slide to the right side, meanwhile, the sliding block 403 slides on the top of the guide rod 402, and power failure is prevented.

[0037] The magnet two 406 position corresponds to the magnet one 306 position, the support rod two 405 and the fixed sleeve 404 are two groups, the two groups of support rod two 405 and fixed sleeve 404 are symmetrically arranged on the outer wall of the synchronous rod two 407 with the center line of the synchronous rod two 407 as the axis of symmetry, the support rod two 405 is made of conductive material and is used for conducting during the switching process of the filter capacitor 103, when the temperature of the filter capacitor 103 is too high, the air cylinder 408 is started to drive the synchronous rod two 407 to slide to the right, and the sliding block 403 slides on the surface of the guide rod two 402 to prevent power failure, the filter capacitor 103 on the left side is switched to the right side, and the left filter capacitor 103 is not disconnected instantaneously due to the attraction of the magnet two 406 and the left magnet one 306, at this time, the left filter capacitor 103 is not disconnected instantaneously, the magnet one 306 drives the sliding rod 305 to slide in the inner wall of the sliding groove 307, and the synchronous rod one 303 is driven by the limiting rod 304 to compress the spring 302 to slide synchronously to the right on the outer wall of the guide rod one 301, so that the two poles of the filter capacitor 103 move synchronously, and the filter capacitor 103 slides to the right through the switching assembly 4, the magnet one 306 on the right side is attracted by the magnet two 406, the magnet one 306 drives the synchronous rod one 303 to slide on the outer wall of the guide rod one 301, the magnet one 306 on the right side contacts the outer wall of the magnet two 406, and the filter capacitor 103 on the right side is connected to the circuit, and the two groups of filter capacitors 103 are connected through the support rod two 405 in a parallel manner in the circuit, and filtering is performed simultaneously.

[0038] The output rod 401 and the guide rod two 402 are two groups, the two groups of output rod 401 and guide rod two 402 are equidistantly arranged on the inner wall of the base 1 with the center line of the base 1 as the rotation axis, the outer wall of the output rod 401 penetrates the inner wall of the base 1, and the bottom of the guide rod two 402 is fixedly connected with the bottom of the inner wall of the base 1, the output rod 401 is used for being connected with the frequency converter circuit, the guide rod two 402 is made of conductive material and is used for conducting the output rod 401, the two groups of guide rods are separated and connected with the two terminals of the filter capacitor 103 through the support rod two 405 and the connecting rod 309, respectively, to form a loop, so that when the filter capacitor 103 is switched and connected to the circuit, series connection or sparking is prevented.

[0039] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-frequency low-voltage capacitor suitable for frequency converters, comprising a base (1), wherein a support plate (101) is fixedly connected to the surface of the base (1), a motor (102) is fixedly connected to the top of the support plate (101), and the surface of the base (1) is fixedly connected to the bottom terminal of a filter capacitor (103), characterized in that, The base (1) is provided with a detection mechanism (2) on its surface, and also includes: A switching mechanism (3) is disposed inside the base (1). The switching mechanism (3) includes a guide rod (301). A spring (302) is fixedly connected to the outer wall of the guide rod (301). The other end of the spring (302) is fixedly connected to the outer wall of the synchronizing rod (303). A limit rod (304) is fixedly connected to the inner wall of the synchronizing rod (303). A sliding rod (305) is fixedly connected to the bottom of the limit rod (304). The end of the sliding rod (305) away from the limit rod (304) is connected to the outer side of the guide block (308). The sliding groove (307) is slidably connected to the wall of the sliding rod (309). The outer wall of the guide block (308) is fixedly connected to the outer wall of the connecting rod (309). A magnet (306) is fixedly connected to the outer wall of the sliding rod (305). A switching component (4) is provided below the guide rod (301). The synchronization rod (303) is made of insulating material and is used to drive the sliding rod (305) to slide synchronously in the sliding groove (307) through the limiting rod (304). The guide block (308) and the sliding rod (305) are made of conductive material and are used to conduct electricity during capacitor thermal switching. The switching component (4) includes a cylinder (408), the output end of which is fixedly connected to the outer wall of the second synchronizing rod (407), a fixing sleeve (404) is fixedly connected to the outer wall of the second synchronizing rod (407), a support rod (405) is fixedly connected to the inner wall of the fixing sleeve (404), and a magnet (406) is fixedly connected to the outer wall of the second support rod (405). The magnet (406) is used to magnetically attract the first magnet (306). The number of filter capacitors (103) is two sets. The two sets of filter capacitors (103) are symmetrically arranged on the surface of the base (1) with the center line of the support plate (101) as the axis of symmetry. The number of switching mechanisms (3) is two sets. The two sets of switching mechanisms (3) are symmetrically arranged inside the base (1) with the center line of the base (1) as the axis of symmetry. The inner wall of the connecting rod (309) is fixedly connected to the bottom terminal of the filter capacitor (103).

2. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 1, characterized in that: The detection mechanism (2) includes a support rod (201), a detection block (204) is fixedly connected to the outer wall of the support rod (201), a heat-conducting plate (205) is fixedly connected to the top of the detection block (204), a heat dissipation hole (206) is opened on the outer wall of the heat-conducting plate (205), a fan (202) is rotatably connected to the outer wall of the heat-conducting plate (205) through a bearing, a heat dissipation hole (203) is opened on the outer wall of the fan (202), and the detection block (204) is used to detect the heat of the capacitor.

3. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 1, characterized in that: The outer wall of the second support rod (405) is fixedly connected to a sliding block (403), the bottom of the sliding block (403) is slidably connected to a guide rod (402), the bottom of the guide rod (402) is fixedly connected to an output rod (401), and the sliding block (403) is used to ensure that the filter capacitor (103) continues to conduct electricity during the switching process.

4. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 1, characterized in that: The output end of the motor (102) passes through the top of the support plate (101) and is fixedly connected to the top of the fan (202). The inner wall of the first synchronizing rod (303) is slidably connected to the outer wall of the first guide rod (301). The first guide rod (301) is used to guide the first synchronizing rod (303).

5. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 2, characterized in that: The number of the detection mechanism (2) is two sets. The two sets of detection mechanisms (2) are symmetrically arranged on the surface of the base (1) with the center line of the support plate (101) as the axis of symmetry. The top of the fan (202) is rotatably connected to the inner wall of the support plate (101) through a bearing. The inner wall of the heat-conducting plate (205) is in contact with the outer wall of the filter capacitor (103). The heat-conducting plate (205) is used to conduct heat to the filter capacitor (103).

6. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 1, characterized in that: The position of the second magnet (406) corresponds to the position of the first magnet (306). There are two sets of the second support rod (405) and the fixed sleeve (404). The two sets of the second support rod (405) and the fixed sleeve (404) are symmetrically arranged on both sides of the outer wall of the second synchronization rod (407) with the center line of the second synchronization rod (407) as the axis of symmetry. The second support rod (405) is made of conductive material and is used to conduct electricity during the switching process of the filter capacitor (103).

7. The high-frequency low-voltage capacitor suitable for frequency converters according to claim 3, characterized in that: There are two sets of output rods (401) and guide rods (402). The two sets of output rods (401) and guide rods (402) are symmetrically arranged at the bottom of the inner wall of the base (1) with the center line of the base (1). The outer wall of the output rod (401) penetrates the inner wall of the base (1). The bottom of the guide rod (402) is fixedly connected to the bottom of the inner wall of the base (1). The output rod (401) is used to connect with the inverter circuit. The guide rod (402) is made of conductive material and is used to make conductive connection to the output rod (401).

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