Power supply system and motor controller

Abstract

The application discloses a power supply system and a motor controller, wherein the power supply system comprises a starting module, a control module and a modulation module; the starting module is used for generating a starting voltage; the control module is started and generates an adjustable control signal based on the control of the starting voltage; the modulation module modulates an input voltage based on the control of the control signal to generate a first voltage, which is used for providing a power supply voltage for the control module. According to the power supply system and the motor controller, a starting voltage is generated first to start the control module, then the modulation module is controlled by the control module to modulate the input voltage to obtain the first voltage, and the control module is provided with the power supply voltage by the first voltage. In this process, the modulation module can greatly reduce the input voltage, thereby adapting to the demand of a higher voltage platform, and has a certain adaptability to a wide range of input voltages.

Description

Technical Field

[0001] This application belongs to the field of intelligent power supply technology, specifically relating to a power supply system and a motor controller. Background Technology

[0002] The tool industry is increasingly adopting voltage platforms of 24V, 40V, 60V, 80V, and even 100V and above. For different voltage platforms, suitable step-down chips are needed to reduce the power supply voltage to a level usable by motor drive chips and microcontrollers. Generally, two step-down methods are used: DC-DC step-down chips and LDO chips. However, DC-DC step-down chips are expensive, require complex components, and have a limited voltage range. LDO chips are only suitable for low voltage levels and small voltage drops, and they generate a lot of heat.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a power supply system and motor controller that can solve the problems of high cost, high heat generation and low voltage range of existing power supply solutions.

[0005] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0006] A power supply system includes: a startup module for generating a startup voltage; a control module for starting up and generating an adjustable control signal based on the startup voltage; and a modulation module for modulating an input voltage based on the control signal to generate a first voltage, the first voltage being used to provide a power supply voltage for the control module.

[0007] In one or more embodiments of this application, the startup module includes a protection unit and an energy storage unit. A first terminal of the protection unit is connected to the input voltage, and a second terminal of the protection unit and a first terminal of the energy storage unit are connected to the control module to generate the startup voltage based on the power-on of the input voltage. The second terminal of the energy storage unit is connected to ground voltage.

[0008] In one or more embodiments of this application, the modulation module includes a switching unit and a filtering unit. The first terminal of the switching unit is connected to the input voltage. The switching unit periodically turns on or off based on the control signal to generate a switching voltage through its second terminal. The filtering unit is connected to the second terminal of the switching unit to filter the switching voltage to generate the first voltage.

[0009] In one or more embodiments of this application, the switching unit includes a first switching subunit and a second switching subunit. A first terminal of the first switching subunit is connected to ground voltage, and a second terminal of the first switching subunit is connected to the control terminal of the second switching subunit. The control terminal of the first switching subunit is connected to the control module to receive a control signal. The first switching subunit controls the connection and disconnection between the control terminal of the second switching subunit and ground voltage based on the control signal. The first terminal of the second switching subunit is used to form the first terminal of the switching unit, and the second terminal of the second switching subunit is used to form the second terminal of the switching unit. The second switching subunit turns on or off based on the voltage of its own control terminal.

[0010] In one or more embodiments of this application, the first switching subunit includes a first transistor, a first resistor, and a second resistor. A first end of the first resistor is used to form a control terminal of the first switching subunit. A second end of the first resistor and a first end of the second resistor are connected to the control terminal of the first transistor. A second end of the second resistor is connected to the first end of the first transistor to form a first terminal of the first switching subunit. A second end of the first transistor is used to form a second terminal of the first switching subunit. And / or the second switching subunit includes a second transistor, a third resistor, and a fourth resistor. A first end of the third resistor is connected to the first end of the second transistor to form a first terminal of the second switching subunit. A second end of the second transistor is used to form a second terminal of the second switching subunit. A second end of the third resistor and a first end of the fourth resistor are connected to the control terminal of the second transistor. A second end of the fourth resistor is used to form a control terminal of the second switching subunit.

[0011] In one or more embodiments of this application, the modulation module further includes a filtering unit, the filtering unit including a first capacitor, a first terminal of the first capacitor being connected to a second terminal of the switching unit to generate the first voltage, and a second terminal of the first capacitor being connected to ground voltage.

[0012] In one or more embodiments of this application, the filtering unit further includes a fifth resistor, a first diode, a second capacitor, and an inductor. The first end of the fifth resistor is connected to the second end of the switching unit. The second end of the fifth resistor, the first end of the second capacitor, and the cathode of the first diode are connected to the first end of the inductor. The second end of the inductor is connected to the first end of the first capacitor to generate the first voltage. The second end of the second capacitor and the anode of the first diode are connected to ground voltage.

[0013] In one or more embodiments of this application, the power supply system further includes a sampling module connected to the modulation module to sample the first voltage to generate a sampling voltage, and a control module further connected to the sampling module to adjust the control signal based on the sampling voltage.

[0014] In one or more embodiments of this application, the power supply system further includes a voltage regulator module connected to the modulation module to regulate the first voltage and generate the power supply voltage required by the control module; or the power supply system further includes a voltage regulator module and a second diode, the voltage regulator module being connected to the modulation module to regulate the first voltage and generate the power supply voltage required by the control module, the anode of the second diode being connected to the voltage regulator module to receive the power supply voltage, and the cathode of the second diode being connected to the control module.

[0015] A specific embodiment of this application also provides a motor controller, including a motor, a motor inverter bridge, and the aforementioned power supply system, wherein the motor inverter bridge is used to control the rotation of the motor; and the first voltage supplies power to the motor inverter bridge.

[0016] Compared to existing technologies, the power supply system and motor controller of this application first generate a startup voltage to start the control module, and then the control module controls the modulation module to modulate the input voltage to obtain a first voltage, which is then used to provide power to the control module. In this process, the modulation module can significantly reduce the input voltage, thus adapting to the needs of higher voltage platforms and exhibiting a certain adaptability to a wide range of input voltages. Through voltage modulation, there is no need to use DC-DC chips or LDO chips, reducing circuit costs and avoiding the problem of excessive chip heat generation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a circuit diagram of a power supply system in one embodiment of this application. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0020] The terms "coupled," "connected," or "linked" in this specification include both direct and indirect connections. Indirect connections are those made through an intermediate medium, such as those made through an electrically conductive medium, which may have parasitic inductance or capacitance. Indirect connections may also include connections made through other active or passive devices to achieve the same or similar functional purpose, such as connections through switches, follower circuits, or other circuits or components. Furthermore, in this specification, terms such as "first" and "second" are primarily used to distinguish one technical feature from another, and do not necessarily require or imply any actual relationship, quantity, or order between these technical features.

[0021] In the detailed description of this specification, reference is made to the accompanying drawings, which form a part thereof, wherein like reference numerals always denote like parts, and wherein exemplary embodiments are shown by way of example that may be implemented. It should be understood that other embodiments may be utilized, and structural or logical changes may be made, without departing from the scope of this application. Therefore, the following detailed description should not be considered limiting.

[0022] The various operations in the specification may be described sequentially as multiple discrete actions or operations in a manner most conducive to understanding the claimed subject matter. However, the order of description should not be construed as implying that these operations must be sequentially related. Specifically, these operations may not be performed in the order presented. The described operations may be performed in a different order than in the described embodiments. Various additional operations may be performed in additional embodiments and / or the described operations may be omitted.

[0023] For the purposes of this application, the phrase "A and / or B" means (A), (B), or (A and B). For the purposes of this application, the phrase "A, B and / or C" means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).

[0024] Various components and devices may be mentioned or shown in the singular form herein, but only for the convenience of discussion, and any element mentioned in the singular form may include multiple such elements as taught herein.

[0025] The description uses the phrases "in one embodiment," "in other embodiments," or "in some embodiments," each of which can refer to one or more of the same or different embodiments. Furthermore, the terms "comprising," "including," "having," etc., used in relation to embodiments of this application are synonymous.

[0026] like Figure 1 As shown, the power supply system in one embodiment of this application includes a startup module 10, a control module 20, a modulation module 30, a voltage regulator module 40, a sampling module 50, and a second diode D2.

[0027] The startup module 10 generates a startup voltage. The control module 20 is connected to the startup module 10 and is activated based on the startup voltage, generating an adjustable control signal Power_control. The modulation module 30 is connected to the control module 20 and modulates the input voltage B+ based on the control signal Power_control to generate a first voltage, which provides power to the control module 20.

[0028] The voltage regulator module 40 is connected to the modulation module 30 to regulate the first voltage and generate the power supply voltage required by the control module 20. The anode of the second diode D2 is connected to the voltage regulator module 40 to receive the power supply voltage, and the cathode of the second diode D2 is connected to the control module 20. The sampling module 50 is connected to the modulation module 30 to sample the first voltage and generate a sampling voltage Power_Chk. The control module 20 is also connected to the sampling module 50 to adjust the control signal Power_control based on the sampling voltage Power_Chk.

[0029] like Figure 1 As shown, the startup module 10 includes a protection unit 11 and an energy storage unit 12. The first terminal of the protection unit 11 is connected to the input voltage B+, and the second terminal of the protection unit 11 and the first terminal of the energy storage unit 12 are connected to the control module 20 to generate a startup voltage based on the power-on of the input voltage B+. The second terminal of the energy storage unit 12 is connected to the ground voltage.

[0030] For example, the protection unit 11 may include a sixth resistor R6 and a seventh resistor R7. The first terminal of the sixth resistor R6 is connected to the input voltage B+ and is used to form the first terminal of the protection unit 11. The second terminal of the sixth resistor R6 is connected to the first terminal of the seventh resistor R7. The second terminal of the seventh resistor R7 is connected to the first terminal of the energy storage unit 12 and is used to form the second terminal of the protection unit 11.

[0031] For example, the energy storage unit 12 may include a third capacitor C3. The first end of the third capacitor C3 is connected to the control module 20 and is used to form the first end of the energy storage unit 12. The second end of the third capacitor C3 is connected to the ground voltage and is used to form the second end of the energy storage unit 12.

[0032] Preferably, the equivalent resistance of the protection unit 11 is relatively large. When the input voltage B+ is powered on, the starting voltage will gradually rise and the voltage value will not be too high, so that the control module 20 is powered on and starts working.

[0033] In other embodiments, the startup module 10 may also employ other circuit structures or power supply modules, as long as they can provide a certain voltage to the control module 20 for its startup.

[0034] like Figure 1 As shown, the control module 20 includes a control chip U1. In one embodiment, the control chip U1 may be a motor drive control chip, a microcontroller, etc.

[0035] Pin 20 (power supply terminal) of control chip U1 is connected to the second terminal of the seventh resistor R7 to receive the startup voltage. Control chip U1 can be turned on based on the startup voltage and generates the control signal Power_control through its own pin 8. Pin 20 of control chip U1 is also connected to the cathode of the second diode D2 to receive the power supply voltage through the second diode D2, thereby ensuring that control chip U1 is continuously powered on.

[0036] Pin 14 of the control chip U1 is connected to the sampling module 50 to receive the sampling voltage Power_Chk. The control chip U1 can adjust the control signal Power_control based on the sampling voltage Power_Chk.

[0037] like Figure 1 As shown, the modulation module 30 includes a switching unit 31 and a filtering unit 32. The first terminal of the switching unit 31 is connected to the input voltage B+. The switching unit 31 periodically turns on or off based on the control signal Power_control to generate a switching voltage through its second terminal. The filtering unit 32 is connected to the second terminal of the switching unit 31 to filter the switching voltage and generate a first voltage, exemplarily 12V.

[0038] The switching unit 31 includes a first switching subunit 311 and a second switching subunit 312. The first terminal of the first switching subunit 311 is connected to ground, and the second terminal of the first switching subunit 311 is connected to the control terminal of the second switching subunit 312. The control terminal of the first switching subunit 311 is connected to pin 8 of the control chip U1 to receive the control signal Power_control. The first switching subunit 311 controls the connection between the control terminal of the second switching subunit 312 and ground based on the Power_control control signal. The first terminal of the second switching subunit 312 is connected to the input voltage B+ and forms the first terminal of the switching unit 31. The second terminal of the second switching subunit 312 is connected to the filter unit 32 and forms the second terminal of the switching unit 31. The second switching subunit 312 is turned on or off based on the voltage on its own control terminal.

[0039] Specifically, the first switching subunit 311 includes a first transistor Q1, a first resistor R1, and a second resistor R2. The first end of the first resistor R1 is connected to pin 8 of the control chip U1 to receive the control signal Power_control and forms the control terminal of the first switching subunit 311. The second ends of the first resistor R1 and the first ends of the second resistor R2 are connected to the control terminal of the first transistor Q1. The second ends of the second resistor R2 and the first ends of the first transistor Q1 are connected to ground voltage and form the first terminal of the first switching subunit 311. The second end of the first transistor Q1 is connected to the control terminal of the second switching subunit 312 and forms the second terminal of the first switching subunit 311.

[0040] The second switching subunit 312 includes a second transistor Q2, a third resistor R3, and a fourth resistor R4. The first terminal of the third resistor R3 and the first terminal of the second transistor Q2 are connected to the input voltage B+, forming the first terminal of the second switching subunit 312. The second terminal of the second transistor Q2 is connected to the filter unit 32, forming the second terminal of the second switching subunit 312. The second terminal of the third resistor R3 and the first terminal of the fourth resistor R4 are connected to the control terminal of the second transistor Q2, and the second terminal of the fourth resistor R4 is connected to the second terminal of the first transistor Q1, forming the control terminal of the second switching subunit 312.

[0041] In one embodiment, the first transistor Q1 is an NPN transistor, with its first terminal being the emitter, its second terminal being the collector, and its control terminal being the base. The second transistor Q2 is a P-channel MOSFET, with its first terminal being the source, its second terminal being the drain, and its control terminal being the gate. In other embodiments, the first transistor Q1 can also be a PNP transistor or other devices, and the second transistor Q2 can also be an N-channel MOSFET or other devices, in which case the connection and control methods are adapted accordingly.

[0042] like Figure 1 As shown, the filter unit 32 includes a fifth resistor R5, a first capacitor C1, a second capacitor C2, an inductor L1, and a first diode D1. The first terminal of the fifth resistor R5 is connected to the second terminal of the second transistor Q2. The second terminal of the fifth resistor R5, the first terminal of the second capacitor C2, and the cathode of the first diode D1 are connected to the first terminal of the inductor L1. The second terminal of the inductor L1 is connected to the first terminal of the first capacitor C1 to generate a first voltage. The second terminal of the second capacitor C2, the anode of the first diode D1, and the second terminal of the first capacitor C1 are connected to ground.

[0043] When the control signal Power_control is high, the first transistor Q1 is turned on, the control terminal voltage of the second transistor Q2 is pulled low, and the second transistor Q2 is turned off. When the control signal Power_control is low, the first transistor Q1 is turned off, the control terminal voltage of the second transistor Q2 is pulled high through the third resistor R3, and the second transistor Q2 is turned on. The periodic switching of the second transistor Q2 achieves the purpose of modulating and reducing the input voltage B+.

[0044] In one embodiment, the control signal Power_control is a PWM signal with an adjustable duty cycle. The control chip U1 can adjust the magnitude of the first voltage by changing the duty cycle of the Power_control signal. Simultaneously, when the input voltage B+ fluctuates, adjusting the duty cycle of the Power_control signal can maintain the first voltage at the desired value, meaning it has a certain adaptability to a wide range of input voltages B+. In other embodiments, the control signal Power_control can also be a PFM or other types of control signal.

[0045] In other embodiments, the filter unit 32 may also include only the first capacitor C1, in which the first terminal of the first capacitor C1 is connected to the second terminal of the second transistor Q2 and generates a first voltage, and the second terminal of the first capacitor C1 is connected to the ground voltage.

[0046] like Figure 1As shown, the voltage regulator module 40 may include a voltage regulator chip U2, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6. The voltage regulator chip U2 may be an LDO chip, preferably a 78L05.

[0047] The first terminal of the fourth capacitor C4 and pin 3 (input terminal) of the voltage regulator chip U2 are connected to the second terminal of the inductor L1 to receive the first voltage. Pin 1 (output terminal) of the voltage regulator chip, the first terminal of the fifth capacitor C5, and the first terminal of the sixth capacitor C6 are connected to the anode of the second diode D2 to generate a power supply voltage, exemplarily 5V. The second terminals of the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and pin 2 (ground terminal) of the voltage regulator chip are connected to ground.

[0048] In other embodiments, the voltage regulator module 40 may be omitted, and the voltage may be directly modulated by the modulation module 30 to modulate the first voltage to a suitable power supply voltage and supply power to the control module 20. Alternatively, other methods may be used to provide power to the control module 20 through the first voltage.

[0049] The second diode D2 is used to prevent current from flowing back into the voltage regulator module 40. In other embodiments, the second diode D2 may not be provided, and then pin 1 (output terminal) of the voltage regulator chip U2, the first terminal of the fifth capacitor C5 and the first terminal of the sixth capacitor C6 are directly connected to pin 20 of the control chip U1.

[0050] like Figure 1 As shown, the sampling module 50 may include an eighth resistor R8, a ninth resistor R9, and a seventh capacitor C7. The first end of the eighth resistor R8 is connected to the second end of the inductor L1 to receive a first voltage. The second end of the eighth resistor R8, the first end of the ninth resistor R9, and the first end of the seventh capacitor C7 are connected to pin 14 of the control chip U1 to generate the sampling voltage Power_Chk. The second end of the ninth resistor R9 and the second end of the seventh capacitor C7 are connected to ground voltage.

[0051] In other embodiments, the sampling module 50 may be omitted, and the control module 20 may directly generate a preset control signal Power_control.

[0052] This embodiment also provides a motor controller, including a motor, a motor inverter bridge, and the aforementioned power supply system. The motor inverter bridge is used to control the motor's rotation, and the first voltage is also used to power the motor inverter bridge. The control chip U1 can be a motor drive control chip or a microcontroller within the motor controller.

[0053] In actual operation, when the input voltage B+ is powered on, the startup module 10 generates a startup voltage, which is just enough to power on the control module 20 and generate a control signal Power_control. Under the control of the Power_control signal, the modulation module 30 can significantly reduce the input voltage B+ to obtain the first voltage. Then, the voltage regulator module 40 regulates the first voltage to obtain the power supply voltage, which is provided to the control module 20 for stable operation. At the same time, the control module 20 can also sample the first voltage and adjust the duty cycle of the control signal Power_control according to the magnitude of the first voltage to stabilize the first voltage at the required voltage value.

[0054] Since the first voltage is significantly lower than the input voltage B+, the voltage regulator module 40 only needs to regulate the first voltage to the required power supply voltage. This reduces the required voltage level of the voltage regulator module 40, allowing the use of a low-dropout, low-cost voltage regulator chip U2. It also reduces the heat generated by the voltage regulator module 40, enabling the entire system to adapt to higher voltage platforms. Compared to traditional circuits that use DC-DC converters, LDOs, and other power supply chips for layered voltage reduction, this method reduces the number and required voltage levels of power supply chips, significantly lowering circuit costs and reducing heat generation.

[0055] Meanwhile, the control module 20 can change the voltage drop ratio of the first voltage relative to the input voltage B+ by adjusting the specific parameters of the control signal Power_control. The entire system can also have good adaptability and adjustment capability for a wide range of input voltages B+.

[0056] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power supply system, characterized in that, include: The startup module is used to generate the startup voltage; The control module is activated based on the control of the starting voltage and generates an adjustable control signal; The modulation module modulates the input voltage based on the control signal to generate a first voltage, which is used to provide a power supply voltage for the control module.

2. The power supply system according to claim 1, characterized in that, The startup module includes a protection unit and an energy storage unit. The first terminal of the protection unit is connected to the input voltage, and the second terminal of the protection unit and the first terminal of the energy storage unit are connected to the control module to generate the startup voltage based on the power-on of the input voltage. The second terminal of the energy storage unit is connected to the ground voltage.

3. The power supply system according to claim 1, characterized in that, The modulation module includes a switching unit and a filtering unit. The first terminal of the switching unit is connected to the input voltage. The switching unit periodically turns on or off based on the control signal to generate a switching voltage through its second terminal. The filtering unit is connected to the second terminal of the switching unit to filter the switching voltage to generate the first voltage.

4. The power supply system according to claim 3, characterized in that, The switching unit includes a first switching subunit and a second switching subunit. A first terminal of the first switching subunit is connected to ground voltage, and a second terminal of the first switching subunit is connected to the control terminal of the second switching subunit. The control terminal of the first switching subunit is connected to the control module to receive control signals. The first switching subunit controls the connection and disconnection between the control terminal of the second switching subunit and ground voltage based on the control signals. The first terminal of the second switching subunit is used to form the first terminal of the switching unit, and the second terminal of the second switching subunit is used to form the second terminal of the switching unit. The second switching subunit turns on or off based on the voltage of its own control terminal.

5. The power supply system according to claim 4, characterized in that, The first switching subunit includes a first transistor, a first resistor, and a second resistor. The first end of the first resistor is used to form the control terminal of the first switching subunit. The second end of the first resistor and the first end of the second resistor are connected to the control terminal of the first transistor. The second end of the second resistor is connected to the first end of the first transistor to form the first terminal of the first switching subunit. The second end of the first transistor is used to form the second terminal of the first switching subunit. and / or The second switching subunit includes a second transistor, a third resistor, and a fourth resistor. The first end of the third resistor is connected to the first end of the second transistor to form the first end of the second switching subunit. The second end of the second transistor is used to form the second end of the second switching subunit. The second end of the third resistor and the first end of the fourth resistor are connected to the control end of the second transistor. The second end of the fourth resistor is used to form the control end of the second switching subunit.

6. The power supply system according to claim 3, characterized in that, The filtering unit includes a first capacitor, a first terminal of which is connected to a second terminal of the switching unit to generate the first voltage, and a second terminal of which is connected to ground voltage.

7. The power supply system according to claim 6, characterized in that, The filtering unit further includes a fifth resistor, a first diode, a second capacitor, and an inductor. The first end of the fifth resistor is connected to the second end of the switching unit. The second end of the fifth resistor, the first end of the second capacitor, and the cathode of the first diode are connected to the first end of the inductor. The second end of the inductor is connected to the first end of the first capacitor to generate the first voltage. The second end of the second capacitor and the anode of the first diode are connected to ground voltage.

8. The power supply system according to claim 1, characterized in that, The power supply system further includes a sampling module connected to the modulation module to sample the first voltage to generate a sampling voltage, and the control module is also connected to the sampling module to adjust the control signal based on the sampling voltage.

9. The power supply system according to claim 1, characterized in that, The power supply system further includes a voltage regulator module connected to the modulation module to regulate the first voltage and generate the power supply voltage required by the control module; or The power supply system further includes a voltage regulator module and a second diode. The voltage regulator module is connected to the modulation module to regulate the first voltage to generate the power supply voltage required by the control module. The anode of the second diode is connected to the voltage regulator module to receive the power supply voltage, and the cathode of the second diode is connected to the control module.

10. A motor controller, characterized in that, The system includes a motor, an inverter bridge for the motor, and a power supply system as described in any one of claims 1 to 9, wherein the inverter bridge for the motor is used to control the rotation of the motor. The first voltage supplies power to the inverter bridge of the motor.

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