Novel high-power inductor capable of adapting to different working conditions

Abstract

The invention discloses a novel high-power inductor capable of adapting to different working conditions, and relates to the technical field of electronic component design, the novel high-power inductor comprises a shell, a switching module and a control module, an inductor holder is arranged in the shell, an inductor A and an inductor B are installed on the inductor holder, the shell is provided with an input port and an output port, and the switching module is connected with the control module. The inductor A is electrically connected with the input port, the inductor B is electrically connected with the output port, the switching module is used for switching the inductor A and the inductor B to a serial or parallel state, the control module is used for monitoring current and voltage parameters of a circuit, and the control module is electrically connected with the switching module. And the switching module is controlled to switch the series-parallel connection state of the inductor A and the inductor B based on the current and voltage parameters of the circuit. Automatic series-parallel connection switching of the high-power inductor under different working conditions is achieved, and adaptability and flexibility of the system are improved. The requirement for replacing the inductor due to the change of working conditions is reduced, and the complexity and cost of the system are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic component design, and more particularly to a novel high-power inductor adaptable to different working conditions. Background Art

[0002] High-power inductors play an important role in power electronic systems, especially in DC / DC converters, for energy storage and filtering. Existing high-power inductors usually adopt a series structure or a parallel structure. The series structure is characterized by high inductance and high voltage tolerance, and is suitable for scenarios requiring high voltage tolerance, but has a low current-carrying capacity. The parallel structure is characterized by low inductance and high current, and is suitable for scenarios requiring large current, but has limited voltage withstand capacity; in addition, there are also some solutions to achieve a certain inductance adjustment through a fixed multi-winding structure or magnetic core adjustment.

[0003] However, the existing high-power inductor has a fixed structure and cannot automatically switch between series and parallel modes according to the circuit output working conditions, resulting in the need to replace the corresponding inductor under different voltage and current requirements, which not only increases the complexity and usage cost of the system, but also reduces the flexibility and adaptability of the system. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a novel high-power inductor adaptable to different working conditions.

[0005] The novel high-power inductor adaptable to different working conditions provided by the present invention adopts the following technical solutions: A novel high-power inductor adaptable to different working conditions includes a housing, a switching module and a control module. An inductor holder is arranged in the housing. Inductor A and inductor B are installed on the inductor holder. An input port and an output port are arranged on the housing. Inductor A is electrically connected to the input port, and inductor B is electrically connected to the output port. The switching module is used to switch inductor A and inductor B to a series or parallel state. The control module is used to monitor the current and voltage parameters of the circuit. The control module is electrically connected to the switching module and controls the switching module to switch the series and parallel states of inductor A and inductor B based on the current and voltage parameters of the circuit.

[0006] Optionally, both inductor A and inductor B include a main winding, a secondary winding, a terminal and a connection copper bar. The main winding and the secondary winding are arranged side by side on the inductor holder, and the winding directions of the main winding and the secondary winding are the same. The terminal is electrically connected to the main winding, and the connection copper bar is electrically connected to the secondary winding. The terminal of inductor A is electrically connected to the input port, and the terminal of inductor B is electrically connected to the output port.

[0007] Optionally, both the main winding and the secondary winding include a central leg core, a coil, and an insulating layer. The coil is wound around the central leg core, and the insulating layer is disposed between the central leg core and the coil. The terminal is electrically connected to the coil on the main winding, and the connection copper bar is electrically connected to the coil on the secondary winding.

[0008] Optionally, the insulating layer includes insulating paper and high-temperature tape that are sequentially coated on the central leg core.

[0009] Optionally, cover cores are provided at both ends of the main winding and the secondary winding, and the cover cores are mounted on the inductor holder.

[0010] Optionally, the central leg core and the cover core are connected through an air gap, and the distance between the central leg core and the cover core is 0.1 mm.

[0011] Optionally, the switching module includes a movable plate, a driving component, a first connecting piece, a second connecting piece, and a third connecting piece. The first connecting piece, the second connecting piece, and the third connecting piece are all mounted on the movable plate; The movable plate is slidably disposed on the inductor holder. The driving component is used to drive the movable plate to slide, and the control module is electrically connected to the driving component; The first connecting piece is used to connect the connection copper bars on the two inductors A and B, so that inductor A and inductor B are connected in series; The second connecting piece is used to connect the connection copper bar of inductor A and the terminal of inductor B, and the third connecting piece is used to connect the terminal of inductor A and the connection copper bar of inductor B, so that inductor A and inductor B are connected in parallel.

[0012] Optionally, positioning blocks are provided on both sides of the movable plate on the inductor holder, and the two positioning blocks are used to limit the movement space of the movable plate; When the movable plate abuts against one of the positioning blocks, the first connecting piece abuts against the connection copper bars on inductor A and inductor B respectively, the second connecting piece is separated from the connection copper bar of inductor A and the terminal of inductor B, and the third connecting piece is separated from the terminal of inductor A and the connection copper bar of inductor B; When the movable plate abuts against the other positioning block, the first connecting piece is separated from the connection copper bars on inductor A and inductor B respectively, the second connecting piece abuts against the connection copper bar of inductor A and the terminal of inductor B, and the third connecting piece abuts against the terminal of inductor A and the connection copper bar of inductor B.

[0013] Optionally, the driving component includes a micro motor, a cam and an elastic member. The micro motor is fixedly arranged on the inductor holder and electrically connected to the control module. The cam is fixedly arranged on the output shaft of the micro motor. The elastic member is used to drive the movable plate to slide towards the cam, and the cam is used to abut against the movable plate and drive the movable plate to slide.

[0014] Optionally, the control module includes an integrated controller, a voltage sensor and a current sensor. The integrated controller is electrically connected to the input port. The voltage sensor and the current sensor are integrally installed on the integrated controller and are respectively used to detect the voltage parameter and the current parameter of the circuit. The integrated controller is electrically connected to the micro motor.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The present invention realizes the automatic series-parallel switching of high-power inductors under different working conditions, improves the adaptability and flexibility of the system, reduces the need to replace inductors due to changes in working conditions, and reduces the system complexity and cost. Specifically, the control module monitors the current and voltage parameters of the circuit and judges the current working condition requirements according to a preset algorithm. If a low inductance and high current mode is required, the control module controls the switching module to switch inductor A and inductor B to a parallel state; if a high inductance and high voltage resistance mode is required, inductor A and inductor B are switched to a series state. The automatic switching of the series-parallel states of inductor A and inductor B under different working conditions is realized, and the adaptability of the system to different working conditions is improved.

[0016] 2. The present invention can effectively enhance the magnetic field closure between the main winding and the secondary winding through the setting of the cover core, reduce the leakage of magnetic flux, and improve the efficiency and stability of the inductor.

[0017] 3. The present invention effectively controls the magnetic resistance of the magnetic circuit through the air gap design between the middle column core and the cover core, and ensures the stable performance of the inductor in different series-parallel states. Specifically, an air gap spacing of 0.1 mm can precisely adjust the saturation characteristics of the core, reduce the magnetic saturation phenomenon under high current working conditions, and thus improve the overall tolerance and working efficiency of the inductor. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of an embodiment of the present invention; Figure 2 is the structural schematic diagram of the inductor holder used in an embodiment of the present invention; Figure 3 is the exploded view of the structure of the inductor holder used in an embodiment of the present invention; Figure 4 is the structural schematic diagram of the switching module used in an embodiment of the present invention; Figure 5It is a schematic structural diagram of the movable plate used in the embodiment of the present invention; Figure 6 It is a sectional structural view of the inductor holder used in the embodiment of the present invention; Figure 7 It is a schematic structural diagram of the drive assembly used in the embodiment of the present invention.

[0019] Explanation of reference numerals: 1. Housing; 11. Input port; 12. Output port; 2. Switching module; 21. Movable plate; 22. First connecting piece; 23. Second connecting piece; 24. Third connecting piece; 25. Micro motor; 26. Cam; 27. Elastic member; 3. Control module; 31. Integrated controller; 32. Voltage sensor; 33. Current sensor; 4. Inductor holder; 401. Inductor A; 402. Inductor B; 403. Main winding; 404. Secondary winding; 405. Terminal; 406. Wiring copper bar; 407. Positioning bracket; 408. Central column magnetic core; 409. Coil; 410. Insulating layer; 411. Cover plate magnetic core; 412. Guide rod; 413. Positioning stop block. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the attached Figure 1 - attached Figure 7 , and the described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention.

[0021] The inventors of the present invention found that the existing high-power inductor has a fixed structure and cannot automatically switch the series-parallel mode according to the circuit output working conditions, resulting in the need to replace the corresponding inductor under different voltage and current requirements, which not only increases the complexity and use cost of the system, but also reduces the flexibility and adaptability of the system. For this reason, the present invention discloses a new type of high-power inductor adaptable to different working conditions, mainly adopting the following solutions: The embodiment of the present invention discloses a new type of high-power inductor adaptable to different working conditions. Refer to Figure 1, including a housing 1, a switching module 2 and a control module 3. An inductor holder 4 is arranged inside the housing 1, and an inductor A 401 and an inductor B 402 are mounted on the inductor holder 4. An input port 11 and an output port 12 are arranged on the housing 1. The inductor A 401 is electrically connected to the input port 11, and the inductor B 402 is electrically connected to the output port 12. The switching module 2 is used to switch the inductor A 401 and the inductor B 402 to a series or parallel state. The control module 3 is used to monitor the current and voltage parameters of the circuit and control the switching module 2 to switch the series-parallel state of the inductor A 401 and the inductor B 402 based on the current and voltage parameters, so as to realize the adaptive adjustment for different working conditions.

[0022] Refer to Figure 1 , the control module 3 includes an integrated controller 31, a voltage sensor 32 and a current sensor 33. The integrated controller 31 is electrically connected to the input port 11. The voltage sensor 32 and the current sensor 33 are integrally mounted on the integrated controller 31 and are respectively used to detect the voltage parameter and the current parameter of the circuit. The integrated controller 31 is electrically connected to the switching module 2. By using the voltage sensor 32 and the current sensor 33 to monitor the voltage and current parameters in the circuit in real time, the integrated controller 31 can intelligently judge the current working condition requirement according to a preset algorithm and automatically control the switching module 2 to act, so as to realize the series-parallel switching of the inductor A 401 and the inductor B 402.

[0023] Refer to Figure 1 , Figure 2 , specifically, both the inductor A 401 and the inductor B 402 include a main winding 403, a secondary winding 404, a terminal 405 and a connection copper bar 406. The main winding 403 and the secondary winding 404 are arranged side by side on the inductor holder 4. A positioning bracket 407 is fixed on the inductor holder 4 by bolts. Both the inductor holder 4 and the positioning bracket 407 are made of insulating materials and are used to fix the main winding 403 and the secondary winding 404.

[0024] Refer to Figure 2 , Figure 3, the terminal 405 and the connection copper bar 406 are both fixedly arranged on the inductor holder 4. The main winding 403 and the secondary winding 404 both include a middle column magnetic core 408, a coil 409 and an insulating layer 410. The coil 409 is wound around the middle column magnetic core 408, and the winding directions of the coils 409 of the main winding 403 and the secondary winding 404 are the same. The coil 409 is wound with a flat copper wire of 1.4×5 for 22Ts, and the precision of the wire spacing is controlled within ±0.05mm. The terminal 405 is electrically connected to the coil 409 on the main winding 403, and the connection copper bar 406 is electrically connected to the coil 409 on the secondary winding 404. Moreover, the terminal 405 of the inductor A 401 is electrically connected to the input port 11, and the terminal 405 of the inductor B 402 is electrically connected to the output port 12. The insulating layer 410 is arranged between the middle column magnetic core 408 and the coil 409. The insulating layer 410 includes insulating paper and high-temperature tape sequentially coated on the middle column magnetic core 408. The thickness of the insulating paper is 0.13mm. The high-temperature tape can be KAPTON high-temperature tape, Teflon high-temperature tape, high-temperature masking tape or PET green high-temperature tape, and its heat resistance is usually between 120 degrees and 260 degrees. This multi-layer composite insulation system effectively improves the voltage withstand capacity of the inductor and ensures its stable operation in a high-voltage environment.

[0025] Refer to Figure 2 , Figure 3 , cover magnetic cores 411 are arranged at both ends of the main winding 403 and the secondary winding 404. The cover magnetic cores 411 are fixedly installed on the inductor holder 4 through positioning brackets 407. The middle column magnetic core 408 and the cover magnetic cores 411 are both made of super iron-silicon-aluminum material. Through the setting of the cover magnetic cores 411, the magnetic field enclosure of the main winding 403 and the secondary winding 404 can be effectively enhanced, magnetic flux leakage can be reduced, and the efficiency and stability of the inductor can be improved. Specifically, the middle column magnetic core 408 and the cover magnetic cores 411 are connected through an air gap, and the distance between the middle column magnetic core 408 and the cover magnetic cores 411 is 0.1mm. Through the air gap design between the middle column magnetic core 408 and the cover magnetic cores 411, the magnetic resistance of the magnetic circuit is effectively controlled, ensuring the stable performance of the inductor in different series-parallel states. The air gap distance of 0.1mm can accurately adjust the saturation characteristics of the magnetic core, reduce the magnetic saturation phenomenon under high-current conditions, thereby improving the overall tolerance and working efficiency of the inductor.

[0026] The input current enters the main winding 403 of inductor A401 through input port 11, forming an electromagnetic field within the main winding 403. Since the main winding 403 of inductor A401 and the secondary winding 404 are arranged side by side and have the same winding direction, by the principle of electromagnetic induction, the magnetic field passes through the coil 409 of the secondary winding 404, forming an induced current within the secondary winding 404 of inductor A401. When inductor A401 is connected in series with inductor B402, the connection copper bars 406 of inductor A401 and inductor B402 are connected. The induced current formed within the secondary winding 404 of inductor A401 enters the secondary winding 404 of inductor B402, and then, by the principle of electromagnetic induction, an induced current is formed within the main winding 403 of inductor B402, and afterwards, it is output from output port 12.

[0027] When inductor A401 is connected in parallel with inductor B402, the connection copper bar 406 of inductor A401 is connected to the connection terminal 405 of inductor B402, and the connection copper bar 406 of inductor B402 is connected to the connection terminal 405 of inductor A401, making inductor A401 and inductor B402 in a parallel state. The induced current formed within the secondary winding 404 of inductor A401 directly flows out through output port 12. Similarly, the current at input port 11 directly enters the secondary winding 404 of inductor B402, forming an electromagnetic field within the secondary winding 404 of inductor B402, and then, by the principle of electromagnetic induction, an induced circuit is formed within the main winding 403 of inductor B402, and afterwards, it flows out from output port 12.

[0028] Refer to Figure 4 、 Figure 5 Referring to

[0029] Refer to Figure 4 、 Figure 5 ,the switching module 2 includes a movable plate 21, a driving component, a first connecting piece 22, a second connecting piece 23, and a third connecting piece 24. The movable plate 21 is slidably arranged on the inductor holder 4 and is located between inductor A401 and inductor B402. A guide rod 412 is fixedly arranged on the inductor holder 4, and the movable plate 21 slidably passes through the guide rod 412, which is used to limit the sliding trajectory of the movable plate 21. The movable plate 21 is made of an insulating material.

[0030] Reference Figure 4 and Figure 6 , positioning stoppers 413 are provided on both sides of the movable plate 21 on the inductor holder 4, and the two positioning stoppers 413 are used to limit the movement space of the movable plate 21. When the movable plate 21 abuts against one of the positioning stoppers 413, the first connecting piece 22 abuts against the wiring copper bars 406 on the inductor A 401 and the inductor B 402 respectively, the second connecting piece 23 is separated from the wiring copper bar 406 of the inductor A 401 and the wiring terminal 405 of the inductor B 402, and the third connecting piece 24 is separated from the wiring terminal 405 of the inductor A 401 and the wiring copper bar 406 of the inductor B 402. At this time, the inductor A 401 and the inductor B 402 are in a series state. When the movable plate 21 abuts against the other positioning stopper 413, the first connecting piece 22 is separated from the wiring copper bars 406 on the inductor A 401 and the inductor B 402 respectively, the second connecting piece 23 abuts against the wiring copper bar 406 of the inductor A 401 and the wiring terminal 405 of the inductor B 402, and the third connecting piece 24 abuts against the wiring terminal 405 of the inductor A 401 and the wiring copper bar 406 of the inductor B 402. At this time, the inductor A 401 and the inductor B 402 are in a parallel state.

[0031] Reference Figure 6 and Figure 7 , the driving assembly is used to drive the movable plate 21 to slide. Specifically, the driving assembly includes a micro motor 25, a cam 26 and an elastic member 27. The micro motor 25 is fixedly arranged on the inductor holder 4 and is electrically connected to the integrated controller 31. The micro motor 25 can be a stepping motor or a servo motor to achieve precise control. The cam 26 is fixedly arranged on the output shaft of the micro motor 25. The elastic member 27 is an elastic steel sheet, and the elastic steel sheet is designed in a U shape. The elastic steel sheet is fixedly arranged on the inductor holder 4 and abuts against the movable plate 21 to drive the movable plate 21 to slide in the direction close to the cam 26. The elastic member 27 can also be a spring.

[0032] The movable plate 21 abuts against the positioning stopper 413 on the side close to the cam 26 under the elastic force of the elastic steel sheet. At this time, the inductor A 401 and the inductor B 402 are in a parallel state; when it is necessary to switch the inductor A 401 and the inductor B 402 to a series state, the integrated controller 31 is used to control the micro motor 25 to start, drive the cam 26 to rotate, the cam 26 abuts against the movable plate 21 and pushes the movable plate 21 to slide, so that the movable plate 21 abuts against the positioning stopper 413 on the side far from the cam 26. At this time, the cam 26 stops rotating, realizing the series-parallel switching of the inductor A 401 and the inductor B 402.

[0033] Furthermore, the switching module 2 can also use a solid-state switch to replace the mechanical movable plate 21 and the driving component. The solid-state switch is directly connected to the terminal 405 and the wiring busbar 406 of the inductor A401 and the inductor B402, and realizes the series-parallel switching of the inductor A401 and the inductor B402 through the control signal sent by the control module 3. This design further improves the switching speed and service life, and at the same time reduces the wear of mechanical components.

[0034] The implementation principle of a novel high-power inductor that can adapt to different working conditions in the embodiment of the present invention is as follows: The control module 3 monitors the current and voltage parameters of the circuit, and judges the current working condition requirements according to the preset algorithm. If a low inductance and high current mode is required, the control module 3 controls the switching module 2 to switch the inductor A401 and the inductor B402 to a parallel state; if a high inductance and high voltage resistance mode is required, the inductor A401 and the inductor B402 are switched to a series state. The automatic switching of the series-parallel states of the inductor A401 and the inductor B402 under different working conditions is realized, which improves the adaptability of the system to different working conditions, reduces the need to replace the inductor due to the change of the working condition, and reduces the system complexity and cost.

[0035] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A new high-power inductor adaptable to different working conditions, characterized in that: It includes a housing (1), a switching module (2) and a control module (3). An inductor holder (4) is arranged inside the housing (1). An inductor A (401) and an inductor B (402) are installed on the inductor holder (4). An input port (11) and an output port (12) are arranged on the housing (1). The inductor A (401) is electrically connected to the input port (11), and the inductor B (402) is electrically connected to the output port (12). The switching module (2) is used to switch the inductor A (401) and the inductor B (402) to a series or parallel state. The control module (3) is used to monitor the current and voltage parameters of the circuit. The control module (3) is electrically connected to the switching module (2) and controls the switching module (2) to switch the series-parallel state of the inductor A (401) and the inductor B (402) based on the current and voltage parameters of the circuit.

2. A novel high-power inductor adaptable to different working conditions according to claim 1, characterized in that: Both the inductor A (401) and the inductor B (402) include a main winding (403), a secondary winding (404), a terminal (405) and a connection copper bar (406). The main winding (403) and the secondary winding (404) are arranged side by side on the inductor holder (4), and the winding directions of the main winding (403) and the secondary winding (404) are the same. The terminal (405) is electrically connected to the main winding (403), and the connection copper bar (406) is electrically connected to the secondary winding (404). The terminal (405) of the inductor A (401) is electrically connected to the input port (11), and the terminal (405) of the inductor B (402) is electrically connected to the output port (12).

3. A novel high-power inductor adaptable to different working conditions according to claim 2, characterized in that: Both the main winding (403) and the secondary winding (404) include a central leg core (408), a coil (409) and an insulating layer (410). The coil (409) is wound around the central leg core (408), and the insulating layer (410) is arranged between the central leg core (408) and the coil (409). The terminal (405) is electrically connected to the coil (409) on the main winding (403), and the connection copper bar (406) is electrically connected to the coil (409) on the secondary winding (404).

4. A novel high-power inductor adaptable to different working conditions according to claim 3, characterized in that: The insulating layer (410) includes insulating paper and high-temperature tape sequentially coated on the central leg core (408).

5. A novel high-power inductor adaptable to different working conditions according to claim 3, characterized in that: Cover cores (411) are arranged at both ends of the main winding (403) and the secondary winding (404), and the cover cores (411) are installed on the inductor holder (4).

6. A novel high-power inductor adaptable to different working conditions according to claim 5, characterized in that: The central leg core (408) and the cover core (411) are connected by an air gap, and the distance between the central leg core (408) and the cover core (411) is 0.1 mm.

7. A novel high-power inductor adaptable to different working conditions according to claim 2, characterized in that: The switching module (2) includes a movable plate (21), a driving component, a first connecting piece (22), a second connecting piece (23) and a third connecting piece (24). The first connecting piece (22), the second connecting piece (23) and the third connecting piece (24) are all installed on the movable plate (21); The movable plate (21) is slidably arranged on the inductor holder (4). The driving component is used to drive the movable plate (21) to slide, and the control module (3) is electrically connected to the driving component; The first connecting piece (22) is used to connect the wiring copper bars (406) on the two inductors A (401) and inductor B (402), so that inductor A (401) is connected in series with inductor B (402); The second connecting piece (23) is used to connect the wiring copper bar (406) of inductor A (401) and the wiring terminal (405) of inductor B (402). The third connecting piece (24) is used to connect the wiring terminal (405) of inductor A (401) and the wiring copper bar (406) of inductor B (402), so that inductor A (401) is connected in parallel with inductor B (402).

8. A novel high-power inductor adaptable to different working conditions according to claim 7, characterized in that: Positioning blocks (413) are arranged on both sides of the movable plate (21) on the inductor holder (4). The two positioning blocks (413) are used to limit the movement space of the movable plate (21); When the movable plate (21) abuts against one of the positioning blocks (413), the first connecting piece (22) abuts against the wiring copper bars (406) on the inductor A (401) and the inductor B (402) respectively, the second connecting piece (23) is separated from the wiring copper bar (406) of the inductor A (401) and the wiring terminal (405) of the inductor B (402), and the third connecting piece (24) is separated from the wiring terminal (405) of the inductor A (401) and the wiring copper bar (406) of the inductor B (402); When the movable plate (21) abuts against the other positioning block (413), the first connecting piece (22) is separated from the wiring copper bars (406) on the inductor A (401) and the inductor B (402) respectively, the second connecting piece (23) abuts against the wiring copper bar (406) of the inductor A (401) and the wiring terminal (405) of the inductor B (402), and the third connecting piece (24) abuts against the wiring terminal (405) of the inductor A (401) and the wiring copper bar (406) of the inductor B (402).

9. A novel high-power inductor adaptable to different working conditions according to claim 8, characterized in that: The driving component includes a micro motor (25), a cam (26) and an elastic member (27). The micro motor (25) is fixedly arranged on the inductor holder (4) and is electrically connected to the control module (3). The cam (26) is fixedly arranged on the output shaft of the micro motor (25). The elastic member (27) is used to drive the movable plate (21) to slide in the direction close to the cam (26), and the cam (26) is used to abut against the movable plate (21) and drive the movable plate (21) to slide.

10. A novel high-power inductor adaptable to different working conditions according to claim 9, characterized in that: The control module (3) includes an integrated controller (31), a voltage sensor (32) and a current sensor (33). The integrated controller (31) is electrically connected to the input port (11). The voltage sensor (32) and the current sensor (33) are integrally installed on the integrated controller (31) and are respectively used to detect the voltage parameter and the current parameter of the circuit. The integrated controller (31) is electrically connected to the micro motor (25).

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