Power adjustment system and method

Abstract

A power adjustment system and method, the method comprising the following steps applicable to the power adjustment system: using a measurement circuit of the power adjustment system to measure the input voltage of the power adjustment system; using the measurement circuit to measure a voltage of a first end of an upper-bridge switch of the power adjustment system; using the measurement circuit to measure a voltage of a battery; using the measurement circuit to measure a current flowing to the upper-bridge switch; using the measurement circuit to measure a current of the battery; using the measurement circuit to measure a current flowing through a motor; and using a controller circuit of the power adjusting system to determine whether the power adjustment system and the motor are abnormal according to the measured voltages and currents, so as to control operations of the upper-bridge switch, each lower-bridge switch and a switching circuit. In practical use, an inductor does not need to be provided, and motor driving and battery charging can be still achieved while saving circuit costs.

Description

Power adjustment system and method Technical Field

[0001] The present invention relates to a motor, and in particular to a power adjustment system and method applicable to a motor. Background Art

[0002] As global warming worsens and people become increasingly concerned about harmful gases and carbon emissions, electric vehicles are replacing fuel-powered vehicles, becoming the ideal future direction for the automotive industry. To ensure the widespread adoption of electric vehicles in the future, further improvements must be made to the control of charging stations over both charging and driving.

[0003] Summary of the Invention

[0004] The present invention addresses the shortcomings of the prior art by providing a power regulation system comprising a switching circuit, a motor drive circuit, a detection circuit, and a controller circuit. The switching circuit comprises a first switching component, a second switching component, and a third switching component. The first end of the third switching component is connected to an input power source. The second end of the third switching component is connected to the first end of the first switching component. The second end of the first switching component and the first end of the second switching component are connected to the positive terminal of a battery. The second end of the second switching component is connected to the first end of each of the motor's multiple coils. The motor drive circuit comprises a plurality of upper bridge switches and a plurality of lower bridge switches. The first end of each upper bridge switch is connected to the second end of the third switching component and the first end of the first switching component. The second ends of the upper bridge switches are respectively connected to the first ends of the lower bridge switches and to the second ends of the motor's multiple coils. The second end of each lower bridge switch is connected to the negative terminal of the battery. The detection circuit is connected to the circuit between the motor drive circuit and the switching circuit. The detection circuit is configured to detect the voltage and current in the circuit between the motor drive circuit and the switching circuit and output a detection signal. The controller circuit is connected to the switching circuit, the control ends of the upper bridge switches, the control ends of the lower bridge switches, and the detection circuit. The controller circuit is configured to control the high-bridge switch, each low-bridge switch, and the switching circuit based on the detection signal. In a battery charging mode, the controller circuit activates the third switching element and the second switching element. Power supplied by the input power source sequentially flows through the third switching element, one or more of the plurality of high-bridge switches, the motor, and the second switching element to the battery. In a motor driving mode, the controller circuit activates the first switching element. Power supplied by the battery sequentially flows through the first switching element and one or more of the plurality of high-bridge switches to the motor.

[0005] In an embodiment, the first switching assembly, the second switching assembly, and the third switching assembly each include a first switching switch and a second switching switch. The first end of the first switching switch of the third switching assembly is connected to an input power source. The second end of the first switching switch of the third switching assembly is connected to the first end of the second switching switch of the third switching assembly. The second end of the second switching switch of the third switching assembly is connected to the first end of each upper bridge switch. The first end of the first switching switch of the second switching assembly is connected to the first end of the second switching switch of the second switching assembly. The second end of the second switching switch of the second switching assembly is connected to the first end of each coil of the motor. The first end of the first switching switch of the first switching assembly is connected to the first end of each upper bridge switch. The second end of the first switching switch of the first switching assembly is connected to the first end of the second switching switch of the first switching assembly. The second end of the second switching switch of the first switching assembly is connected to the positive terminal of the battery.

[0006] In an embodiment, the power adjustment system further includes a rectifier circuit connected between the input power source and the first terminal of the third switching component.

[0007] In addition, the present invention provides a power adjustment method, which is applicable to a power adjustment system. The power adjustment method includes the following steps: (a) using a controller circuit to turn off the first switching component, the second switching component and the third switching component; (b) using a detection circuit to detect the voltage of the node between the first end of the third switching component and the input power supply; (c) using the controller circuit to determine whether to enter the battery charging mode, if so, before entering the battery charging mode, perform steps (d) to (f) in sequence, if not, perform step (g); (d) using the detection circuit to detect the voltage of the node between the second end of the third switching component and the first end of each upper bridge switch; (e) using the detection circuit to detect the voltage of the node between the first end of the second switching component and the positive end of the battery; (f) using the controller circuit, based on the voltage of the node between the first end of the third switching component and the input power supply, the voltage of the node between the second end of the third switching component and the first end of each upper bridge switch, and the first end of the second switching component (g) using a controller circuit to determine whether to enter a motor drive mode, and if so, executing steps (h) to (j) in sequence; if not, returning to step (a); (h) using a detection circuit to detect the voltage of a node between the first end of the first switching component and the first end of each upper bridge switch; (i) using a detection circuit to detect the voltage of a node between the positive terminal of the battery and the second end of the first switching component; and (j) using a controller circuit to determine whether the first switching component is abnormal based on the voltage of the node between the first end of the first switching component and the first end of each upper bridge switch and the voltage of the node between the positive terminal of the battery and the second end of the first switching component, and thereby controlling the operation of the upper bridge switch, each lower bridge switch and the switching circuit.

[0008] In an embodiment, the power adjustment method further includes the following steps: (k) using a controller circuit to determine whether the voltage of the node between the first end of the third switching component and the input power supply is higher than an input voltage threshold; if so, determining to execute the battery charging mode in step (c); if not, determining not to enter the battery charging mode in step (c).

[0009] In an embodiment, the power adjustment method further includes the following steps performed after deciding to enter the battery charging mode: using a controller circuit to keep the first switching component, the second switching component, and the third switching component closed; using the controller circuit to determine whether the voltage of the node between the second end of the third switching component and the first end of each upper bridge switch is higher than a system static allowable voltage difference; if so, it is determined that an abnormality has occurred in the switching circuit; if not, the next step is executed; using the controller circuit to keep the first switching component and the third switching component closed, while turning on the second switching component; using the controller circuit to subtract the voltage of the node between the second end of the third switching component and the first end of each upper bridge switch from the voltage of the node between the first end of the second switching component and the positive terminal of the battery , to calculate a first charging detection voltage difference; using the controller circuit, determine whether the first charging detection voltage difference is lower than the system static allowable voltage difference, if not, determine that the second switching component has an abnormality, and if so, execute the next step; using the controller circuit, keep the first switching component closed, and simultaneously turn on the second switching component and the third switching component; using the controller circuit, subtract the voltage of the node between the second end of the third switching component and the first end of each upper bridge switch from the voltage of the node between the first end of the third switching component and the input power supply, to calculate the second charging detection voltage difference; and using the controller circuit, determine whether the second charging detection voltage difference is lower than the system static allowable voltage difference, if not, determine that the third switching component has an abnormality, and if so, determine that the third switching component has not an abnormality.

[0010] In an embodiment, the power adjustment method further includes the following steps performed in a battery charging mode: utilizing a controller circuit to maintain the first switching component closed while simultaneously enabling the second switching component and the third switching component; and utilizing the controller circuit to determine whether the second charging detection voltage difference is lower than a system operating allowable voltage difference. If not, it is determined that an abnormality has occurred in the power adjustment system; and if so, it is determined that no abnormality has occurred in the power adjustment system.

[0011] In an embodiment, the power adjustment method further includes the following steps performed after deciding to enter the battery charging mode: using a controller circuit to maintain the first switching component closed, while turning on the second switching component and the third switching component; using the controller circuit to determine whether the voltage of the node between the first end of the third switching component and the input power supply is higher than a charging undervoltage protection threshold, if not, adjusting the control of the upper bridge switch, each lower bridge switch and the switching circuit, if so, executing the next step; and using the controller circuit to determine whether the voltage of the node between the first end of the third switching component and the input power supply is higher than an overvoltage protection threshold, if so, adjusting the control of the upper bridge switch, each lower bridge switch and the switching circuit, if not, entering the battery charging mode.

[0012] In an embodiment, the power adjustment method further includes the following steps performed in a battery charging mode: using a controller circuit to keep the first switching component closed and the second switching component and the third switching component open; using a detection circuit to detect the current flowing through the second switching component to the battery; and using the controller circuit to determine whether the current flowing through the second switching component to the battery is less than a charging current threshold. If not, it is determined that overcurrent has occurred; if so, it is determined that no overcurrent has occurred.

[0013] In an embodiment, the power adjustment method further includes the following steps performed in a battery charging mode: using a controller circuit to keep the first switching component closed and the second switching component and the third switching component open; using a detection circuit to detect the current flowing through any phase or any phase of the motor; and using a controller circuit to determine whether the current flowing through any phase or any phase of the motor is less than a phase current threshold. If not, it is determined that the motor has an overcurrent; if so, it is determined that the motor has not an overcurrent.

[0014] In an embodiment, the power adjustment method further includes the following steps performed after deciding to enter the motor drive mode: using a controller circuit to keep the first switching component, the second switching component and the third switching component closed; using the controller circuit to determine whether the voltage of the node between the first end of the first switching component and the first end of each upper bridge switch is higher than a system static allowable voltage difference, if so, determine that an abnormality has occurred in the switching circuit, if not, execute the next step; using the controller circuit to keep the second switching component and the third switching component closed, and at the same time turn on the first switching component; using the controller circuit to subtract the voltage of the node between the positive end of the battery and the second end of the first switching component from the voltage of the node between the first end of the first switching component and the first end of each upper bridge switch to calculate a first drive detection voltage difference; and using the controller circuit to determine whether the first drive detection voltage difference is lower than the system static allowable pressure difference, if not, determine that an abnormality has occurred in the first switching component, and if so, determine that no abnormality has occurred in the first switching component.

[0015] In an embodiment, the power adjustment method further includes the following steps performed after deciding to enter the motor drive mode: using the controller circuit to keep the second switching component and the third switching component closed, while turning on the first switching component; using the controller circuit to determine whether the voltage of the node between the positive terminal of the battery and the second terminal of the first switching component is higher than a battery undervoltage protection threshold, if not, adjusting the control of the upper bridge switch, each lower bridge switch and the switching circuit, if so, executing the next step; and using the controller circuit to determine whether the voltage of the node between the positive terminal of the battery and the second terminal of the first switching component is higher than an overvoltage protection threshold, if so, adjusting the control of the upper bridge switch, each lower bridge switch and the switching circuit, if not, entering the motor drive mode.

[0016] In an embodiment, the power adjustment method further includes the following steps performed in a motor drive mode: using a controller circuit to subtract the voltage of a node between the positive terminal of the battery and the second terminal of the first switching component from the voltage of a node between the first terminal of the first switching component and the first terminal of each upper bridge switch to calculate a first drive detection voltage difference; and using the controller circuit to determine whether the first drive detection voltage difference is lower than a system operating allowable pressure difference. If not, it is determined that an abnormality has occurred in the power adjustment system. If so, it is determined that no abnormality has occurred in the power adjustment system.

[0017] In an embodiment, the power adjustment method further includes the following steps performed in a motor drive mode: using a controller circuit to keep the second switching component and the third switching component closed while turning on the first switching component; using a detection circuit to detect the current flowing through the line between the first switching component and the first end of each upper bridge switch; and using the controller circuit to determine whether the current flowing through the line between the first switching component and the first end of each upper bridge switch is less than a driving current threshold; if not, determining that overcurrent has occurred; if so, determining that no overcurrent has occurred.

[0018] In an embodiment, the power adjustment method further includes the following steps performed in a motor drive mode: using a controller circuit to keep the second switching component and the third switching component closed, while turning on the first switching component; using a detection circuit to detect the current flowing through any phase or any phase of the motor; and using a controller circuit to determine whether the current flowing through any phase or any phase of the motor is less than a phase current threshold. If not, it is determined that the motor has an overcurrent; if so, it is determined that the motor has not an overcurrent.

[0019] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and illustration and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a block diagram of a power adjustment system according to the first and second embodiments of the present invention.

[0021] FIG2 is a block diagram of a controller circuit of a power adjustment system according to the first and second embodiments of the present invention.

[0022] FIG3 is a circuit diagram of a power adjustment system according to a first embodiment of the present invention.

[0023] FIG. 4 is a schematic diagram showing the current flow of the power adjustment system in the battery charging mode according to the first embodiment of the present invention.

[0024] FIG. 5 is a schematic diagram illustrating current flow of the power adjustment system in the motor driving mode according to the first embodiment of the present invention.

[0025] FIG6 is a circuit diagram of a power adjustment system according to a second embodiment of the present invention.

[0026] FIG. 7 is a flowchart illustrating the steps of the power adjustment system in the battery charging mode according to the first embodiment of the present invention.

[0027] FIG. 8 is a flowchart illustrating the steps of the power adjustment system in the motor drive mode according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical content of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0029] Please refer to Figures 1 to 5, where Figure 1 is a block diagram of the power adjustment system of the first and second embodiments of the present invention, Figure 2 is a block diagram of the controller circuit of the power adjustment system of the first and second embodiments of the present invention, Figure 3 is a circuit diagram of the power adjustment system of the first embodiment of the present invention, Figure 4 is a schematic diagram of the current flow of the power adjustment system of the first embodiment of the present invention in a battery charging mode, and Figure 5 is a schematic diagram of the current flow of the power adjustment system of the first embodiment of the present invention in a motor driving mode.

[0030] As shown in FIG. 1 , the power adjustment system SYS of the present invention includes a switching circuit STW, a controller circuit CTR, a detection circuit DET, and a motor drive circuit DRV, and is adapted to charge a battery BT of an autonomous mobile device (such as, but not limited to, an electric vehicle) and drive a motor MT of the autonomous mobile device (such as, but not limited to, an electric vehicle).

[0031] The switching circuit STW may include a first switching element SWC1, a second switching element SWC2, and a third switching element SWC3 as shown in FIG3. In the first embodiment, the first switching element SWC1 includes a first switch S11 and a second switch S12, the second switching element SWC2 includes a first switch S21 and a second switch S22, and the third switching element SWC3 includes a first switch S31 and a second switch S32.

[0032] If necessary, the power adjustment system SYS of the present invention may further include a rectifier circuit RTF as shown in FIG3 . For example, the rectifier circuit RTF may include a first upper diode D11 , a first lower diode D12 , a second upper diode D21 , a second lower diode D22 , a third upper diode D31 , and a third lower diode D32 .

[0033] The anodes of the first bottom diode D12, the second bottom diode D22, and the third bottom diode D32 are connected to the second end of the second capacitor C2. The first end of the second capacitor C2 is connected to the positive terminal of the battery BT.

[0034] The anode of the third upper diode D31, the anode of the second upper diode D21 and the anode of the first upper diode D11 are all connected to the input power supply PW, and are respectively connected to the cathode of the third lower diode D32, the cathode of the second lower diode D22 and the cathode of the first lower diode D12.

[0035] The cathode of the third upper diode D31, the cathode of the second upper diode D21, and the cathode of the first upper diode D11 are connected to the first end of the first switch S31 of the third switching component SWC3. The second end of the first switch S31 of the third switching component SWC3 is connected to the first end of the second switch S32 of the third switching component SWC3.

[0036] A second end of the second switch S32 of the third switching component SWC3 is connected to the first end of the first high-bridge switch H1, the first end of the second high-bridge switch H2, and the first end of the third high-bridge switch H3, and is also connected to the first end of the first capacitor C1. A second end of the first capacitor C1 is connected to the negative terminal of the battery BT.

[0037] If necessary, the third switching element SWC3 can be connected in parallel to the positive temperature coefficient element 11 (eg, a PTC thermistor), and the first switching element SWC1 can be connected in parallel to the positive temperature coefficient element 12 (eg, a PTC thermistor).

[0038] The second end of the first high-bridge switch H1 is connected to the first end of the first low-bridge switch L1. The second end of the second high-bridge switch H2 is connected to the first end of the second low-bridge switch L2. The second end of the third high-bridge switch H3 is connected to the first end of the third low-bridge switch L3. The second end of the first low-bridge switch L1, the second end of the second low-bridge switch L2, and the second end of the third low-bridge switch L3 are connected to the negative terminal of the battery BT.

[0039] The node between the second end of the first high-bridge switch H1 and the first end of the first low-bridge switch L1 is connected to the second end of the U-phase coil of a motor MT, for example, a three-phase motor. The node between the second end of the second high-bridge switch H2 and the first end of the second low-bridge switch L2 is connected to the second end of the V-phase coil of a motor MT, for example, a three-phase motor. The node between the second end of the third high-bridge switch H3 and the first end of the third low-bridge switch L3 is connected to the second end of the W-phase coil of a motor MT, for example, a three-phase motor.

[0040] The first end of the U-phase coil, the second end of the V-phase coil, and the first end of the W-phase coil of the motor MT, for example, a three-phase motor, are connected to the second end of the second switch S22 of the second switching component SWC2. The first end of the second switch S22 of the second switching component SWC2 is connected to the second end of the first switch S21 of the second switching component SWC2. The first end of the first switch S21 of the second switching component SWC2 is connected to the positive terminal of the battery BT.

[0041] The positive terminal of the battery BT is connected to the second terminal of the second switch S12 of the first switching component SWC1. The second terminal of the first switch S11 of the first switching component SWC1 is connected to the first terminal of the second switch S12 of the first switching component SWC1. The first terminal of the first switch S11 of the first switching component SWC1 is connected to the first terminal of the first high-bridge switch H1, the first terminal of the second high-bridge switch H2, and the first terminal of the third high-bridge switch H3.

[0042] The controller circuit CTR is connected to the control end of the first upper bridge switch H1, the control end of the second upper bridge switch H2, the control end of the third upper bridge switch H3, the control end of the first lower bridge switch L1, the control end of the second lower bridge switch L2, the control end of the third lower bridge switch L3, the control ends of the first switch S11 and the second switch S12 of the first switching component SWC1, the control ends of the first switch S21 and the second switch S22 of the second switching component SWC2, and the control ends of the first switch S31 and the second switch S32 of the third switching component SWC3.

[0043] In the battery charging mode and the motor driving mode, the controller circuit CTR can output multiple control signals H1S, L1S, H2S, L2S, H3S, and L3S to the control end of the first upper bridge switch H1, the control end of the first lower bridge switch L1, the control end of the second upper bridge switch H2, the control end of the second lower bridge switch L2, the control end of the third upper bridge switch H3, and the control end of the third lower bridge switch L3 of the motor driving circuit DRV, so as to control the operation of the motor driving circuit DRV.

[0044] In battery charging mode, the controller circuit CTR activates the first and second switches S31, S32 of the third switching element SWC3, and the first and second switches S21, S22 of the second switching element SWC2. As shown in FIG4 , current supplied by the input power source PW sequentially flows through the third switching element SWC3, one or more of the plurality of high-side switches H1, the motor MT, and the second switching element SWC2 to the battery BT.

[0045] In the motor drive mode, the controller circuit CTR turns on the first switch S11 and the second switch S12 of the first switching element SWC1. As shown in FIG5 , current supplied by the battery BT of the autonomous mobile device (such as, but not limited to, an electric vehicle) sequentially flows through the first switching element SWC1 and one or more of the high-bridge switches H1 to the motor MT.

[0046] Please refer to FIG. 6 , which is a circuit diagram of a power adjustment system according to a second embodiment of the present invention.

[0047] The second embodiment of the present invention differs from the first embodiment in that, as shown in FIG6 , in the second embodiment, the first switching assembly SWC1 includes only the first switch S1, the second switching assembly SWC2 includes only the first switch S2, and the third switching assembly SWC1 includes only the first switch S3. The power adjustment system of the second embodiment of the present invention has the same configuration as the power adjustment system of the first embodiment in terms of other components and is not described here in detail.

[0048] Please refer to FIG. 1 to FIG. 5 and FIG. 7 , wherein FIG. 7 is a flow chart of the steps of the power adjustment system in the battery charging mode according to the first embodiment of the present invention.

[0049] The power adjustment system shown in Figure 3 (or in practice the power adjustment system shown in Figure 6) can execute steps SP01 to SP03 shown in Figure 7 before entering the battery charging mode, and can execute steps SP01 to SP119 shown in Figure 7 when deciding to enter and having entered the battery charging mode.

[0050] Before entering the battery charging mode, the controller circuit CTR outputs a plurality of (low-level) control signals SS11, SS12, SS21, SS22, SS31, and SS32 to the control terminals of the first switch S11 and the second switch S12 of the first switching element SWC1 shown in FIG3 (or the first switch S1 shown in FIG6 ), the control terminals of the first switch S21 and the second switch S22 of the second switching element SWC2 shown in FIG3 (or the first switch S2 shown in FIG6 ), and the control terminals of the first switch S31 and the second switch S32 of the third switching element SWC3 shown in FIG3 (or the first switch S3 shown in FIG6 ) (in step SP01 of FIG7 ). As a result, the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all turned off.

[0051] When the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all turned off, the detection circuit DET shown in FIG1 can detect the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 shown in FIG3 and the input power supply PW (in step SP02 of FIG7).

[0052] In the first embodiment, the voltage Vrecti is the input voltage provided to the first terminal of the first switch S31 of the third switching element SWC3 after the input power is rectified by the rectifier circuit RTF. However, the present invention is not limited thereto. In practice, if the rectifier circuit RTF is not provided, the voltage Vrecti described herein may be replaced by the input voltage provided directly to the first terminal of the first switch S31 of the third switching element SWC3 by the input power.

[0053] When the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all closed, the detection circuit DET shown in FIG1 can also detect the voltage Vcheck of the node between the second end of the second switching switch S32 of the third switching element SWC3 shown in FIG3 (or the first switching switch S3 shown in FIG6 ) and the first end of the upper bridge switch (for example, the first upper bridge switch H1, the second upper bridge switch H2, or the third upper bridge switch H3) (in step SP02 of FIG7 ).

[0054] The controller circuit CTR determines whether the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW detected by the detection circuit DET is higher than an input voltage threshold N0 (step SP03 in FIG7 ).

[0055] If the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW is not greater than an input voltage threshold N0, the controller circuit CTR determines that the powertrain system has not received sufficient power to charge the battery BT and therefore decides not to enter the battery charging mode. At this point, the controller circuit CTR can also determine whether to enter the motor drive mode (step SP201 shown in Figures 7 and 8).

[0056] On the contrary, if the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW is higher than an input voltage threshold N0, the controller circuit CTR may decide to enter the battery charging mode.

[0057] When determining the battery charging mode, the controller circuit CTR may determine whether a voltage Vcheck at a node between the second end of the second switch S32 of the third switching element SWC3 shown in FIG3 and the first end of the high-bridge switch (e.g., the first high-bridge switch H1, the second high-bridge switch H2, or the third high-bridge switch H3) is higher than a system static allowable voltage difference N4 (step SP101 in FIG7 ).

[0058] If the voltage Vcheck at the node between the second end of the second switching switch S32 of the third switching component SWC3 and the first end of the upper bridge switch (for example, the first upper bridge switch H1, the second upper bridge switch H2 or the third upper bridge switch H3) is higher than the system static allowable voltage difference N4, the controller circuit CTR determines that an abnormality has occurred in the switching circuit STW (in step SP102 of Figure 7), and then the power adjustment system (the switching circuit STW) can be reset or adjusted.

[0059] Conversely, if the voltage Vcheck at the node between the second end of the second switch S32 of the third switching element SWC3 and the first end of the upper bridge switch (e.g., the first upper bridge switch H1, the second upper bridge switch H2, or the third upper bridge switch H3) is not higher than the system static allowable voltage difference N4, the controller circuit CTR can output a plurality of low-level control signals SS11, SS12, SS31, SS32 and a plurality of high-level control signals SS21, SS22 to the switching circuit STW.

[0060] As a result, the controller circuit CTR keeps the first switch S11 and the second switch S12 of the first switching component SWC1 and the first switch S31 and the second switch S32 of the third switching component SWC3 closed, while turning on the first switch S21 and the second switch S22 of the second switching component SWC2 (in step SP103 of Figure 7).

[0061] When the first switching element SWC1 and the third switching element SWC3 are turned off but the second switching element SWC2 is turned on, the detection circuit DET can detect the voltage Vdc at the node between the first end of the first switch S21 of the second switching element SWC2 as shown in FIG3 (or the first switch S2 as shown in FIG6 ) and the positive terminal of the battery BT (in step SP104 of FIG7 ).

[0062] The controller circuit CTR subtracts the voltage Vcheck at the node between the second end of the second switch S32 of the third switching element SWC3 and the first end of the high-bridge switch (e.g., the first high-bridge switch H1, the second high-bridge switch H2, or the third high-bridge switch H3) from the voltage Vdc at the node between the first end of the first switch S21 of the second switching element SWC2 and the positive terminal of the battery BT to calculate the first charge detection voltage difference (in step SP104 of FIG. 7 ).

[0063] The controller circuit CTR determines whether the first charge detection voltage difference is lower than a system static allowable voltage difference N4 (in step SP104 of FIG. 7 ).

[0064] If the first charge detection voltage difference is not lower than a system static allowable voltage difference N4, the controller circuit CTR determines that the second switching element SWC2 is abnormal (in step SP105 of FIG. 7 ), and then resets or adjusts the power adjustment system (the second switching element SWC2 ).

[0065] Conversely, if the first charge detection voltage difference is lower than the system static allowable voltage difference N4, the controller circuit CTR determines that no abnormality has occurred in the second switching element SWC2. The controller circuit CTR then maintains the closed state of the first switch S11 and the second switch S12 of the first switching element SWC1, while simultaneously opening the first switch S21 and the second switch S22 of the second switching element SWC2 and the first switch S31 and the second switch S32 of the third switching element SWC3 (step SP106 in FIG. 7 ).

[0066] When the first switching element SWC1 is off but the second switching element SWC2 and the third switching element SWC3 are on, the controller circuit CTR may subtract the voltage Vcheck at the node between the second end of the second switch S32 of the third switching element SWC3 and the first end of the high-bridge switch H1 as shown in FIG. 3 from the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW to calculate the second charge detection voltage difference.

[0067] The controller circuit CTR can determine whether the second charge detection voltage difference is lower than the system static allowable voltage difference N4 (step SP107 in FIG7 ). If the second charge detection voltage difference is not lower than the system static allowable voltage difference N4, the controller circuit CTR determines that an abnormality has occurred in the third switching element SWC3 (step SP108 in FIG7 ), and can then reset or adjust the power adjustment system (of the third switching element SWC3). Conversely, if the second charge detection voltage difference is lower than the system static allowable voltage difference N4, the controller circuit CTR determines that no abnormality has occurred in the third switching element SWC3.

[0068] When the first switching element SWC1 is turned off, but the second switching element SWC2 and the third switching element SWC3 are turned on, the controller circuit CTR can determine whether the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW as shown in FIG3 is higher than a charging under-voltage protection threshold N2 (in step SP109 of FIG7 ).

[0069] If the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW is not higher than a charging undervoltage protection threshold N2, the controller circuit CTR performs an undervoltage protection operation by resetting or adjusting control of the motor drive circuit DRV and the switching circuit STW (step SP110 in FIG. 7 ) to prevent the power adjustment system (including the third switching element SWC3 and other circuit components) of the present invention from burning out due to overload. Otherwise, the undervoltage protection operation is not performed.

[0070] When the first switching element SWC1 is turned off, but the second switching element SWC2 and the third switching element SWC3 are turned on, the controller circuit CTR can determine whether the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW as shown in FIG3 is higher than an overvoltage protection threshold N3 (in step SP111 of FIG7 ).

[0071] If the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW exceeds an overvoltage protection threshold N3, the controller circuit CTR performs an overvoltage protection operation by resetting or adjusting control of the motor drive circuit DRV and the switching circuit STW (step SP112 of FIG. 7 ) to prevent the power adjustment system of the present invention (including the third switching element SWC3 and other circuit components) from burning out due to overvoltage. Otherwise, the overvoltage protection operation is not performed.

[0072] After determining that no abnormality occurs in the power adjustment system of the present invention (steps SP01 to SP03, SP01 to SP112), the power adjustment system may enter a battery charging mode (steps SP113 to SP119).

[0073] In the battery charging mode, the controller circuit CTR may turn on the second switching element SWC2 (at step SP106 in FIG. 7 ) and the third switching element SWC3 (at step SP106 in FIG. 7 ), but turn off the first switching element SWC1 (at steps SP106 and SP113 in FIG. 7 ).

[0074] In the battery charging mode, the controller circuit CTR may determine whether the second charge detection voltage difference is lower than a system operation allowable voltage difference N5 (in step SP114 of FIG. 7 ).

[0075] If the second charge detection voltage difference is not lower than a system operation allowable voltage difference N5, the controller circuit CTR determines that an abnormality has occurred in the power adjustment system (step SP115 in FIG7 ). Otherwise, the controller circuit CTR determines that no abnormality has occurred in the power adjustment system.

[0076] In the battery charging mode, the detection circuit DET can detect the current Idcr flowing through the second switching element SWC2 to the battery BT, and the controller circuit CTR can determine whether the current Idcr detected by the detection circuit DET is less than a charging current threshold N6 (step SP116 in FIG7 ).

[0077] If the current Idcr detected by the detection circuit DET is not less than a charging current threshold N6, the controller circuit CTR determines that the current Idcr is not an overcurrent (at step SP117 in FIG7 ). Otherwise, the controller circuit CTR determines that the current Idcr is an overcurrent.

[0078] In the battery charging mode, the detection circuit DET can detect the current flowing through the motor MT, such as any one of the U, V, and W phases of a three-phase motor, and the controller circuit CTR determines whether the current is less than a single-phase current threshold N8 (step SP118 in Figure 7).

[0079] If the controller circuit CTR determines that the current Iu, Iv, or Iw flowing through any one of the U, V, and W phases of the motor MT, for example, a three-phase motor, is not less than the single-phase current threshold N8, the controller circuit CTR determines that the current Iu, Iv, or Iw is an overcurrent (step SP119 in FIG. 7 ). Conversely, the controller circuit CTR determines that the current Iu, Iv, or Iw is an overcurrent.

[0080] After the power adjustment system of the present invention completes the above operations (steps SP01 to SP03 and steps SP101 to SP119 ), the power adjustment system of the present invention may be reset.

[0081] Please refer to FIG. 1 to FIG. 5 and FIG. 8 , wherein FIG. 8 is a flow chart of the steps of the power adjustment system in the motor drive mode according to the first embodiment of the present invention.

[0082] The power adjustment system shown in FIG3 (or in practice the power adjustment system shown in FIG6 ) can execute steps SP01 to SP03 shown in FIG8 before the motor drive mode, and can execute steps SP201 to SP216 shown in FIG8 when deciding to enter and having entered the motor drive mode.

[0083] Before entering the motor drive mode, the controller circuit CTR outputs a plurality of (low-level) control signals SS11, SS12, SS21, SS22, SS31, and SS32 to the control terminals of the first switch S11 and the second switch S12 of the first switching element SWC1 shown in FIG3 (or the first switch S1 shown in FIG6 ), the control terminals of the first switch S21 and the second switch S22 of the second switching element SWC2 shown in FIG3 (or the first switch S2 shown in FIG6 ), and the control terminals of the first switch S31 and the second switch S32 of the third switching element SWC3 shown in FIG3 (or the first switch S3 shown in FIG6 ) (in step SP01 of FIG7 ). As a result, the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all turned off.

[0084] When the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all turned off, the detection circuit DET shown in FIG1 can detect the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 shown in FIG3 and the input power supply PW (in step SP02 of FIG8).

[0085] When the first switching element SWC1, the second switching element SWC2, and the third switching element SWC3 are all turned off, the detection circuit DET shown in FIG1 can also detect the voltage Vcheck of the node between the first end of the first switching switch S11 of the first switching element SWC1 and the first end of the upper bridge switch (for example, the first upper bridge switch H1, the second upper bridge switch H2, or the third upper bridge switch H3) shown in FIG3 (in step SP02 of FIG8).

[0086] The controller circuit CTR determines whether the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW detected by the detection circuit DET is higher than an input voltage threshold N0 (step SP03 in FIG8 ).

[0087] If the voltage Vrecti of the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW (i.e., the voltage after the input voltage provided by the input power source is rectified by the rectifier circuit RTF) is higher than an input voltage threshold N0, the controller circuit CTR may decide to enter the battery charging mode as described above (step SP101).

[0088] On the contrary, if the voltage Vrecti at the node between the first end of the first switch S31 of the third switching element SWC3 and the input power source PW is not higher than an input voltage threshold N0, the controller circuit CTR may decide not to enter the battery charging mode and then determine whether to enter the motor driving mode (in steps SP201 to SP216 shown in Figure 8).

[0089] When determining the motor drive mode, the controller circuit CTR may determine whether a voltage Vcheck at a node between a first end of the first switch S11 of the first switching component SWC1 and a first end of an upper bridge switch (e.g., the first upper bridge switch H1, the second upper bridge switch H2, or the third upper bridge switch H3) is higher than a system static allowable voltage difference N4 (in step SP201 of FIG8 ).

[0090] If the voltage Vcheck of the node between the first end of the first switching switch S11 of the first switching component SWC1 (or the first end of the first switching switch S1 as shown in Figure 6) and the first end of the upper bridge switch (for example, the first upper bridge switch H1, the second upper bridge switch H2 or the third upper bridge switch H3) is higher than the system static allowable voltage difference N4, the controller circuit CTR determines that an abnormality has occurred in the switching circuit STW (in step SP202 of Figure 8), and then the power adjustment system (the switching circuit STW) can be reset or adjusted.

[0091] Conversely, if the voltage Vcheck at the node between the first end of the first switch S11 of the first switching element SWC1 (or the first end of the first switch S1 as shown in FIG6 ) and the first end of the upper bridge switch (e.g., the first upper bridge switch H1, the second upper bridge switch H2, or the third upper bridge switch H3) is not higher than the system static allowable voltage difference N4, the controller circuit CTR can output a plurality of low-level control signals SS21, SS22, SS31, SS32 and a plurality of high-level control signals SS11, SS12 to the switching circuit STW.

[0092] As a result, the controller circuit CTR maintains closing the first switch S21 and the second switch S22 of the second switching component SWC2 and the first switch S31 and the second switch S32 of the third switching component SWC3, while opening the first switch S11 and the second switch S12 of the first switching component SWC1 (in step SP203 of Figure 8).

[0093] When the second switching element SWC2 and the third switching element SWC3 are turned off but the first switching element SWC1 is turned on, the detection circuit DET can detect the voltage Vdc at the node between the second end of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT (in step SP204 of Figure 8).

[0094] The controller circuit CTR subtracts the voltage Vcheck at a node between the first end of the first switch S11 of the first switching element SWC1 and the first end of the high-bridge switch (e.g., the first high-bridge switch H1, the second high-bridge switch H2, or the third high-bridge switch H3) from the voltage Vdc at a node between the second end of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT to calculate a first driving detection voltage difference (in step SP204 of FIG. 8 ).

[0095] The controller circuit CTR determines whether the first drive detection pressure difference is lower than the system static allowable pressure difference N4. If the first drive detection pressure difference is not lower than the system static allowable pressure difference N4, the controller circuit CTR determines that an abnormality has occurred in the first switching element SWC1 (step SP205 in FIG8 ), and then resets or adjusts the first switching element SWC1. Conversely, if the first drive detection pressure difference is lower than the system static allowable pressure difference N4, the controller circuit CTR determines that no abnormality has occurred in the first switching element SWC1.

[0096] When the second switching element SWC2 and the third switching element SWC3 are turned off but the first switching element SWC1 is turned on, the controller circuit CTR can determine whether the voltage Vdc at the node between the second end of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT is higher than a battery undervoltage protection threshold N1 (step SP206 in Figure 8).

[0097] If the voltage Vdc at the node between the second terminal of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT is not higher than a battery undervoltage protection threshold N1, the controller circuit CTR performs an undervoltage protection operation by resetting or adjusting control of the motor drive circuit DRV and the switching circuit STW (step SP207 in FIG. 8 ) to prevent the power adjustment system (including the third switching element SWC3 and other circuit components) of the present invention from burning out due to overload. Otherwise, the undervoltage protection operation is not performed.

[0098] When the second switching element SWC2 and the third switching element SWC3 are turned off but the first switching element SWC1 is turned on, the controller circuit CTR can determine whether the voltage Vdc at the node between the second end of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT as shown in Figure 3 is higher than an overvoltage protection threshold N3 (step SP208 in Figure 8).

[0099] If the voltage Vdc at the node between the second terminal of the second switch S12 of the first switching element SWC1 and the positive terminal of the battery BT exceeds an overvoltage protection threshold N3, the controller circuit CTR performs an overvoltage protection operation by resetting or adjusting control of the motor drive circuit DRV and the switching circuit STW (step SP209 in FIG. 8 ) to prevent the power adjustment system (including the third switching element SWC3 and other circuit components) of the present invention from burning out due to overvoltage. Otherwise, the overvoltage protection operation is not performed.

[0100] After determining that no abnormality occurs in the plurality of circuit components of the power adjustment system of the present invention (steps SP01 to SP03, SP201 to SP209) as described above, the power adjustment system may enter the motor drive mode (steps SP210 to SP216).

[0101] In the motor driving mode, the controller circuit CTR outputs a plurality of control signals SS11 and SS12 (having a plurality of sine wave waveforms or a plurality of square wave waveforms) to the first switch S11 and the second switch S12 of the first switching element SWC1, respectively, to turn on the first switching element SWC. Simultaneously, the controller circuit CTR outputs a plurality of low-level control signals SS21 and SS22 to the first switch S21 and the second switch S22 of the second switching element SWC2, respectively, to turn off the second switching element SWC2. Simultaneously, the controller circuit CTR outputs a plurality of low-level control signals SS31 and SS32 to the first switch S31 and the second switch S32 of the third switching element SWC3, respectively, to turn off the third switching element SWC3 (in steps SP203 and SP210 of FIG. 8 ).

[0102] In the motor driving mode, the controller circuit CTR may determine whether the first driving detection pressure difference is lower than a system operation allowable pressure difference N5 (in step SP211 of FIG8 ).

[0103] If the first driving detection pressure difference is not lower than the system operating allowable pressure difference N5, the controller circuit CTR determines that the power adjustment system is abnormal (step SP212 in FIG8 ). Otherwise, the controller circuit CTR determines that the power adjustment system is not abnormal.

[0104] In the motor drive mode, the detection circuit DET can detect the current Idc flowing through the line between the first switching element SWC1 and the first end of the upper bridge switch (for example, the first upper bridge switch H1, the second upper bridge switch H2 or the third upper bridge switch H3). The controller circuit CTR can determine whether the current Idc detected by the detection circuit DET is less than a driving current threshold N7 (in steps SP213 and SP220 of Figure 8).

[0105] If the current Idc detected by the detection circuit DET flowing through the circuit between the first switching element SWC1 and the first terminal of the high-bridge switch (e.g., the first high-bridge switch H1, the second high-bridge switch H2, or the third high-bridge switch H3) is not less than a driving current threshold N7, the controller circuit CTR determines that the current Idc is overcurrent (in steps SP214 and SP221 of FIG8 ). Otherwise, the controller circuit CTR determines that the current Idc is overcurrent.

[0106] In the motor drive mode, the detection circuit DET can detect the current Iu, Iv or Iw flowing through the motor MT, such as any one of the U, V, and W phases of a three-phase motor, and the controller circuit CTR determines whether the current Iu, Iv or Iw is less than the single-phase current threshold N7 (in steps SP215 and SP222 of Figure 8).

[0107] If the controller circuit CTR determines that the current Iu, Iv or Iw is not less than the single-phase current threshold N7, the controller circuit CTR determines that the current Iu, Iv or Iw is overcurrent (step SP216 in FIG8 ). Conversely, the controller circuit CTR determines that the current Iu, Iv or Iw is not overcurrent.

[0108] After the power adjustment system of the present invention completes all operations (steps SP01 to SP03 and SP201 to SP216 ), the power adjustment system of the present invention may be reset.

[0109] It should be understood that the present invention is not limited to the above steps. In practice, some steps shown in FIG. 7 and FIG. 8 may be omitted or adjusted according to actual needs.

[0110] In summary, the present invention provides a power adjustment system and method. In the power adjustment system of the present invention, there is no need to set an inductor, and the node between the multiple upper bridge switches and the multiple lower bridge switches is directly connected to the coil of the motor, which saves circuit costs while still achieving motor drive and battery charging. Utilizing the power adjustment method of the present invention, the power adjustment system of the present invention can receive and appropriately adjust the power received from the mains power supply, and supply appropriate power to the battery of a vehicle vehicle (such as an electric vehicle) for charging, without the need for an additional charging pile.

[0111] The contents disclosed above are only preferred feasible embodiments of the present invention and are not intended to limit the claims of the present invention. Therefore, all equivalent technical changes made using the description and drawings of the present invention are included in the claims of the present invention.

Claims

1. A power adjustment system, characterized in that: The power adjustment system comprises: A switching circuit, comprising a first switching component, a second switching component and a third switching component, wherein a first end of the third switching component is connected to an input power source, a second end of the third switching component is connected to a first end of the first switching component, a second end of the first switching component and a first end of the second switching component are connected to a positive terminal of a battery, and a second end of the second switching component is connected to a first end of each of a plurality of coils of a motor; A motor drive circuit, comprising a plurality of upper bridge switches and a plurality of lower bridge switches, wherein a first end of each of the upper bridge switches is connected to a second end of the third switching component and a first end of the first switching component, a second end of each of the upper bridge switches is respectively connected to the first ends of the plurality of lower bridge switches and respectively connected to the second ends of the plurality of coils of the motor, and a second end of each of the lower bridge switches is connected to a negative terminal of the battery; a detection circuit connected to the line between the motor driving circuit and the switching circuit, configured to detect the voltage and current on the line between the motor driving circuit and the switching circuit to output a detection signal; as well as a controller circuit connected to the switching circuit, the control end of each of the upper bridge switches, the control end of each of the lower bridge switches, and the detection circuit, and configured to control the operation of the upper bridge switch, each of the lower bridge switches, and the switching circuit according to the detection signal received from the detection circuit; Wherein, in a battery charging mode, the controller circuit turns on the third switching component and the second switching component, and the power supplied by the input power source flows sequentially through the third switching component, one or more of the plurality of upper bridge switches, the motor and the second switching component to the battery; Wherein, in a motor driving mode, the controller circuit turns on the first switching component, and the power supplied by the battery flows sequentially through the first switching component and one or more of the plurality of upper bridge switches to the motor.

2. The power adjustment system according to claim 1, characterized in that: The first switching component, the second switching component and the third switching component each include a first switching switch and a second switching switch; Wherein, the first end of the first switch of the third switching component is connected to the input power supply, the second end of the first switch of the third switching component is connected to the first end of the second switch of the third switching component, and the second end of the second switch of the third switching component is connected to the first end of each upper bridge switch; Wherein, the first end of the first switch of the second switch component is connected to the positive end of the battery, the second end of the first switch of the second switch component is connected to the first end of the second switch of the second switch component, and the second end of the second switch of the second switch component is connected to the first end of each coil of the motor; Among them, the first end of the first switching switch of the first switching component is connected to the first end of each of the upper bridge switches, the second end of the first switching switch of the first switching component is connected to the first end of the second switching switch of the first switching component, and the second end of the second switching switch of the first switching component is connected to the positive end of the battery.

3. The power adjustment system according to claim 1, characterized in that: The power adjustment system further comprises: A rectifier circuit is connected between the input power source and the first end of the third switching component.

4. A power adjustment method, applicable to the power adjustment system according to claim 1, characterized in that: The power adjustment method comprises the following steps: (a) using the controller circuit to turn off the first switching component, the second switching component and the third switching component; (b) using the detection circuit to detect a voltage of a node between the first end of the third switching element and the input power source; (c) using the controller circuit to determine whether to enter the battery charging mode, if so, executing steps (d) to (f) in sequence before entering the battery charging mode, if not, executing step (g); (d) using the detection circuit to detect a voltage at a node between the second end of the third switching element and the first end of each of the upper bridge switches; (e) using the detection circuit to detect a voltage at a node between the first end of the second switching element and the positive end of the battery; (f) using the controller circuit to determine whether the second switching component and the third switching component are abnormal based on the voltage of the node between the first end of the third switching component and the input power supply, the voltage of the node between the second end of the third switching component and the first end of each of the upper bridge switches, and the voltage of the node between the first end of the second switching component and the positive end of the battery, and to control the operation of the upper bridge switch, each of the lower bridge switches, and the switching circuit accordingly; (g) using the controller circuit to determine whether to enter the motor drive mode, if so, executing steps (h) to (j) in sequence, if not, returning to step (a); (h) using the detection circuit to detect a voltage at a node between the first end of the first switching element and the first end of each of the upper bridge switches; (i) using the detection circuit to detect a voltage at a node between the positive terminal of the battery and the second terminal of the first switching element; as well as (j) Using the controller circuit, based on the voltage of the node between the first end of the first switching component and the first end of each of the upper bridge switches and the voltage of the node between the positive end of the battery and the second end of the first switching component, it is determined whether the first switching component has an abnormality, and the operation of the upper bridge switch, each of the lower bridge switches and the switching circuit is controlled accordingly.

5. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps: The controller circuit is used to determine whether the voltage of the node between the first end of the third switching component and the input power supply is higher than an input voltage threshold. If so, it is determined in step (c) to execute the battery charging mode. If not, it is determined in step (c) not to enter the battery charging mode.

6. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed after deciding to enter the battery charging mode: Using the controller circuit, the first switching component, the second switching component and the third Switch components; Using the controller circuit, determine whether the voltage of the node between the second end of the third switching component and the first end of each of the upper bridge switches is higher than a system static allowable voltage difference, if so, determine that the switching circuit is abnormal, if not, execute the next step; Using the controller circuit, keeping the first switching component and the third switching component closed, while turning on the second switching component; Using the controller circuit, subtracting the voltage of the node between the second end of the third switching component and the first end of each of the upper bridge switches from the voltage of the node between the first end of the second switching component and the positive end of the battery, so as to calculate a first charging detection voltage difference; Using the controller circuit, determining whether the first charging detection voltage difference is lower than the system static allowable voltage difference, if not, determining that the second switching component is abnormal, if yes, executing the next step; Using the controller circuit, keeping the first switching component closed, while turning on the second switching component and the third switching component; Using the controller circuit, subtracting the voltage of the node between the second end of the third switching component and the first end of each of the upper bridge switches from the voltage of the node between the first end of the third switching component and the input power source to calculate a second charge detection voltage difference; as well as The controller circuit is used to determine whether the second charge detection voltage difference is lower than the system static allowable voltage difference. If not, it is determined that the third switching component is abnormal. If so, it is determined that the third switching component is not abnormal.

7. The power adjustment method according to claim 6, characterized in that: The power adjustment method further comprises the following steps performed in the battery charging mode: Using the controller circuit, keeping the first switching component closed, while turning on the second switching component and the third switching component; The controller circuit is used to determine whether the second charging detection voltage difference is lower than a system operation allowable voltage difference. If not, it is determined that an abnormality occurs in the power adjustment system. If so, it is determined that no abnormality occurs in the power adjustment system.

8. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed after deciding to enter the battery charging mode: Using the controller circuit, keeping the first switching component closed, while turning on the second switching component and the third switching component; Using the controller circuit, determining whether the voltage of the node between the first end of the third switching component and the input power source is higher than a charging undervoltage protection threshold, if not, adjusting the control of the upper bridge switch, each of the lower bridge switches and the switching circuit, if yes, executing the next step; as well as The controller circuit is used to determine whether the voltage of the node between the first end of the third switching component and the input power supply is higher than an overvoltage protection threshold. If so, the control of the upper bridge switch, each of the lower bridge switches and the switching circuit is adjusted. If not, the battery charging mode is entered.

9. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed in the battery charging mode: Using the controller circuit, keeping the first switching component closed, and turning on the second switching component and the third switching component; Using the detection circuit to detect the current flowing through the second switching component to the battery; as well as The controller circuit is used to determine whether the current flowing through the second switching component to the battery is less than a charging current threshold. If not, it is determined that overcurrent occurs. If so, it is determined that no overcurrent occurs.

10. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed in the battery charging mode: Using the controller circuit, keeping the first switching component closed, and turning on the second switching component and the third switching component; Using the detection circuit, detecting the current flowing through any one or any one phase of the motor; as well as The controller circuit is used to determine whether the current flowing through any phase or any phase of the motor is less than a phase current threshold. If not, it is determined that the motor has an overcurrent. If so, it is determined that the motor has not an overcurrent.

11. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed after deciding to enter the motor drive mode: Using the controller circuit, maintaining the first switching component, the second switching component, and the third switching component closed; Using the controller circuit, determine whether the voltage of the node between the first end of the first switching component and the first end of each of the upper bridge switches is higher than a system static allowable voltage difference, if so, determine that the switching circuit is abnormal, if not, execute the next step; Using the controller circuit, keeping the second switching component and the third switching component closed, while turning on the first switching component; Using the controller circuit, subtracting the voltage of the node between the first end of the first switching component and the first end of each of the upper bridge switches from the voltage of the node between the positive end of the battery and the second end of the first switching component, so as to calculate a first driving detection voltage difference; as well as The controller circuit is used to determine whether the first drive detection pressure difference is lower than the system static allowable pressure difference. If not, it is determined that the first switching component is abnormal. If so, it is determined that the first switching component is not abnormal.

12. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed after deciding to enter the motor drive mode: Using the controller circuit, keeping the second switching component and the third switching component closed, while turning on the first switching component; Using the controller circuit, determining whether the voltage of the node between the positive terminal of the battery and the second terminal of the first switching component is higher than a battery undervoltage protection threshold, if not, adjusting the control of the upper bridge switch, each of the lower bridge switches and the switching circuit, if yes, executing the next step; as well as Using the controller circuit, determining the node between the positive terminal of the battery and the second terminal of the first switching component Whether the voltage is higher than an overvoltage protection threshold, if so, adjust the control of the upper bridge switch, each of the lower bridge switches and the switching circuit, if not, enter the motor driving mode.

13. The power adjustment method according to claim 12, characterized in that: The power adjustment method further comprises the following steps performed in the motor driving mode: Using the controller circuit, subtracting the voltage of the node between the first end of the first switching component and the first end of each of the upper bridge switches from the voltage of the node between the positive end of the battery and the second end of the first switching component, so as to calculate a first driving detection voltage difference; as well as The controller circuit is used to determine whether the first drive detection pressure difference is lower than a system operating allowable pressure difference. If not, it is determined that an abnormality occurs in the power adjustment system. If so, it is determined that no abnormality occurs in the power adjustment system.

14. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed in the motor driving mode: Using the controller circuit, keeping the second switching component and the third switching component closed, while turning on the first switching component; Using the detection circuit to detect the current flowing through the line between the first switching component and the first end of each upper bridge switch; as well as The controller circuit is used to determine whether the current flowing through the line between the first switching component and the first end of each upper bridge switch is less than a driving current threshold. If not, it is determined that overcurrent occurs; if so, it is determined that no overcurrent occurs.

15. The power adjustment method according to claim 4, characterized in that: The power adjustment method further comprises the following steps performed in the motor driving mode: Using the controller circuit, keeping the second switching component and the third switching component closed, while turning on the first switching component; Using the detection circuit, detecting the current flowing through any one or any one phase of the motor; as well as The controller circuit is used to determine whether the current flowing through any phase or any phase of the motor is less than a phase current threshold. If not, it is determined that the motor has an overcurrent. If so, it is determined that the motor has not an overcurrent.

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