An inverter drive power supply system, motor controller and vehicle

Abstract

The application provides an inverter driving power supply system, a motor controller and a vehicle, and relates to the technical field of double-motor controllers.The inverter driving power supply system comprises a first driving power supply and a second driving power supply, the first driving power supply is connected with a first inverter module and a second inverter module respectively, the second driving power supply is connected with the first inverter module and the second inverter module respectively, and the first driving power supply and the second driving power supply are used for cross power supply to different driving units corresponding to the first inverter module and the second inverter module respectively.The application can ensure that both the inverter modules can obtain driving power supply, improve the utilization rate of the driving power supply, reduce the number of driving power supplies and the number of related devices, is favorable for reducing the system cost, and can improve the reliability of the inverter driving power supply system, when one of the driving power supplies is abnormal, the other driving power supply can still maintain the power supply to the corresponding driving unit, and can provide power supply guarantee for the system to enter a preset safe working state.

Description

Technical Field

[0001] This invention relates to the field of dual-motor controller technology, and more specifically, to an inverter drive power supply system, a motor controller, and a vehicle. Background Technology

[0002] Dual-motor drive systems in new energy vehicles typically employ dual-inverter motor controllers to drive two motors separately. To ensure the normal operation of the drive circuits for the power switching devices in the inverter, isolated auxiliary drive power supplies are required to provide operating voltage to each bridge arm drive circuit. To meet functional safety standards, existing dual-inverter motor controllers typically use independent auxiliary drive power supplies, ensuring that the upper and lower bridge arm drive circuits of the two inverter modules are powered by their respective isolated auxiliary drive power supplies. When one auxiliary drive power supply fails, the remaining auxiliary drive power supplies can still maintain the normal operation of the corresponding bridge arm drive circuit, ensuring that the power switching devices can enter fault-safe states such as active short circuits, thereby meeting functional safety requirements.

[0003] However, the above power supply methods usually require the configuration of multiple independent isolated auxiliary drive power supplies, resulting in a large number of transformers and their output windings, rectifier circuits and peripheral devices. This not only increases the system size and manufacturing cost, but also increases the circuit complexity, increases potential failure points and reduces system reliability. Summary of the Invention

[0004] The problem solved by this invention is how to achieve reliable power supply for drive power at low cost.

[0005] To address the aforementioned problems, this invention provides an inverter drive power supply system, a motor controller, and a vehicle.

[0006] In a first aspect, the present invention provides an inverter drive power supply system, including a first drive power supply and a second drive power supply. The first drive power supply is connected to a first inverter module and a second inverter module respectively, and the second drive power supply is connected to the first inverter module and the second inverter module respectively. The first drive power supply and the second drive power supply are used to cross-supply different drive units corresponding to the first inverter module and the second inverter module respectively.

[0007] Optionally, the first drive power supply includes a first isolation transformer, which includes a plurality of first output windings and second output windings. The plurality of first output windings are respectively connected to the upper bridge arm drive circuit of the first inverter module after passing through a rectifier circuit. The plurality of first output windings are used to supply power to the upper bridge arm drive circuit corresponding to the first inverter module. The second output windings are connected to the lower bridge arm drive circuit corresponding to the second inverter module after passing through a rectifier circuit. The second output windings are used to supply power to the corresponding lower bridge arm drive circuit of the second inverter module.

[0008] Optionally, the second drive power supply includes a second isolation transformer, which includes a plurality of third output windings and a fourth output winding. The plurality of third output windings are respectively connected to the upper bridge arm drive circuit corresponding to the second inverter module after being rectified by a rectifier circuit. The plurality of third output windings are used to supply power to the upper bridge arm drive circuit corresponding to the second inverter module. The fourth output winding is connected to the lower bridge arm drive circuit corresponding to the first inverter module after being rectified by a rectifier circuit. The fourth output winding is used to supply power to the lower bridge arm drive circuit corresponding to the first inverter module.

[0009] Optionally, both the first driving power supply and the second driving power supply include a rectifier circuit. The rectifier circuit is connected between the corresponding output winding and the driving unit. The rectifier circuit is used to convert the AC power output from the output winding into DC power to provide a driving voltage to the corresponding driving unit.

[0010] Optionally, the first driving power supply and the second driving power supply output a positive driving voltage and a negative driving voltage, which are used to provide a turn-on driving voltage and a turn-off driving voltage for the corresponding driving unit.

[0011] In a second aspect, the present invention provides a motor controller, including a first inverter module, a second inverter module, and the inverter drive power supply system described in the first aspect.

[0012] Optionally, the motor controller further includes a drive unit connected to the first inverter module and the second inverter module, and the drive unit is used to amplify the input PWM control signal.

[0013] Optionally, the drive unit is connected to the power switching devices in the first inverter module and the second inverter module. The drive unit is used to output a drive signal to the power switching devices according to the PWM control signal and to detect the operating status of the power switching devices.

[0014] Optionally, both the first inverter module and the second inverter module include multiple power switching devices, which are connected to form a bridge inverter circuit. The first inverter module and the second inverter module are used to convert DC power into AC power and output it to the corresponding motor.

[0015] Thirdly, the present invention provides a vehicle including the motor controller described in the second aspect.

[0016] The beneficial effects of the inverter drive power supply system of the present invention are as follows: by setting the inverter drive power supply system to include a first drive power supply and a second drive power supply, and the first drive power supply and the second drive power supply respectively cross-supply different drive units of the first inverter module and the second inverter module, therefore, compared with the power supply method of configuring an independent drive power supply for each inverter module, while ensuring that both inverter modules can obtain drive power supply, the drive power supply is shared, the utilization rate of the drive power supply is improved, the number of drive power supplies and related components is reduced, which is conducive to reducing system cost and improving the reliability of the inverter drive power supply system. When one drive power supply is abnormal, the other drive power supply can still maintain the power supply to the corresponding drive unit, providing power supply guarantee for the system to enter the preset safe working state. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the architecture of the inverter drive power supply system according to an embodiment of the present invention; Figure 2 A schematic diagram of a dual-inverter architecture for an existing independent power supply system; Figure 3 A schematic diagram of the dual inverter architecture for an existing shared down-pipe power supply system; Figure 4 This is a power supply schematic diagram of an embodiment of the present invention; Figure 5 This is a schematic diagram of the hardware architecture of the motor controller according to an embodiment of the present invention. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0020] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0023] In related technologies, combined Figure 2 The illustrated independent power supply system features a dual-inverter architecture. The dual inverters include a first inverter P1 and a second inverter P3. Each inverter employs a UVW three-phase full-bridge topology, with each bridge arm including upper and lower bridge arm power switching devices. An isolation transformer is used to isolate and transfer the low-voltage power supply from the primary side to the secondary side, providing drive voltage for each bridge arm drive circuit. Specifically, the first inverter P1 is equipped with a first auxiliary drive power supply T1 and a second auxiliary drive power supply T3. The first auxiliary drive power supply T1 supplies power to the UVW three-phase upper bridge arm drive circuit of the P1 inverter, and the second auxiliary drive power supply T3 supplies power to the UVW three-phase lower bridge arm drive circuit of the P1 inverter. The second inverter P3 is equipped with a third auxiliary drive power supply T2 and a fourth auxiliary drive power supply T4. The third auxiliary drive power supply T2 supplies power to the UVW three-phase upper bridge arm drive circuit of the P3 inverter, and the fourth auxiliary drive power supply T4 supplies power to the UVW three-phase lower bridge arm drive circuit of the P3 inverter. The four auxiliary drive power supplies mentioned above are respectively for the upper and lower bridge arms of the two inverters. Each power supply system is independent of the others, resulting in higher costs.

[0024] Combination Figure 3The dual-inverter architecture of the shared lower arm power supply system shown in the diagram uses a shared lower arm power supply architecture for the motor controller to reduce the number of auxiliary drive power supplies. The upper arms of the two inverters are still powered by their respective auxiliary drive power supplies. One of the auxiliary drive power supplies T3 and T4, which were originally used to power the lower arms of the two inverters respectively, is retained. This auxiliary drive power supply simultaneously powers the lower arm drive circuits of the first inverter P1 and the second inverter P3, thus replacing the original two independent lower arm auxiliary drive power supplies. This allows the two inverter lower arm drive circuits to share a single auxiliary drive power supply, which reduces the number of auxiliary drive power supplies and lowers the system cost to some extent, but it also presents reliability issues.

[0025] To address the problems existing in the aforementioned related technologies, this embodiment provides an inverter drive power supply system, a motor controller, and a vehicle.

[0026] like Figure 1 As shown in the figure, an inverter drive power supply system provided by an embodiment of the present invention includes a first drive power supply and a second drive power supply. The first drive power supply is connected to a first inverter module and a second inverter module respectively, and the second drive power supply is connected to the first inverter module and the second inverter module respectively. The first drive power supply and the second drive power supply are used to cross-supply different drive units corresponding to the first inverter module and the second inverter module respectively.

[0027] Specifically, the inverter drive power supply system includes a first drive power supply T1 and a second drive power supply T2. Both the first drive power supply and the second drive power supply are isolated drive power supplies, which are used to provide drive voltage to the drive units in the first inverter module P1 and the second inverter module P3, respectively. The first inverter module and the second inverter module can be used to drive different motors, or they can be used together in a multi-motor drive system. The first drive power supply is electrically connected to multiple drive units in the first inverter module and the second inverter module, and the second drive power supply is also electrically connected to multiple drive units in the first inverter module and the second inverter module. Unlike the traditional dual-inverter structure where each drive unit is equipped with an independent auxiliary drive power supply, this embodiment adopts a cross-power supply architecture. That is, the first drive power supply not only supplies power to the drive units in the first inverter module, but also supplies power to some drive units in the second inverter module, and the second drive power supply not only supplies power to the drive units in the second inverter module, but also supplies power to some drive units in the first inverter module. For example, the drive power output from the first drive power supply is distributed to different drive units in the first inverter module and the second inverter module, and the drive power output from the second drive power supply is also distributed to another part of the drive units in the first inverter module and the second inverter module. Thus, the drive units in the first inverter module and the second inverter module are powered by different drive power supplies, realizing the cross-power supply relationship between the two drive power supplies. Since the different drive units in the first inverter module and the second inverter module are powered by the first drive power supply and the second drive power supply respectively, when one of the drive power supplies malfunctions, some drive units connected to that drive power supply may stop working, while the other drive power supply can still maintain normal power supply to the drive units connected to it. Therefore, by the cross power supply relationship between the two drive power supplies, the failure of a single auxiliary drive power supply can be avoided, thereby improving the fault tolerance capability of the system.

[0028] Furthermore, in application scenarios that meet functional safety requirements, when a certain drive power supply or corresponding power module fails, the drive power supply that has not failed can still maintain the driving capability of some power switching devices, enabling the inverter module to enter a preset safe state according to the control strategy, such as an active short circuit state, thereby improving the functional safety and reliability of the dual inverter motor control system.

[0029] The drive unit is used to receive the drive voltage provided by the inverter drive power supply system and drive the power switching devices in the inverter module according to the PWM control signal. The drive unit includes at least an isolation drive circuit, and may also include a fault detection circuit, a protection circuit, and a drive control circuit.

[0030] In this embodiment, the inverter drive power supply system includes a first drive power supply and a second drive power supply. The first drive power supply and the second drive power supply cross-supply different drive units of the first inverter module and the second inverter module, respectively. Therefore, compared with the power supply method of configuring an independent drive power supply for each inverter module, while ensuring that both inverter modules can obtain drive power supply, the drive power supply is shared, which improves the utilization rate of the drive power supply, reduces the number of drive power supplies and related components, helps to reduce system cost, and improves the reliability of the inverter drive power supply system. When one drive power supply fails, the other drive power supply can still maintain the power supply to the corresponding drive unit, providing power supply guarantee for the system to enter the preset safe working state.

[0031] Optionally, the first drive power supply includes a first isolation transformer, which includes a plurality of first output windings and second output windings. The plurality of first output windings are respectively connected to the upper bridge arm drive circuit of the first inverter module after passing through a rectifier circuit. The plurality of first output windings are used to supply power to the upper bridge arm drive circuit corresponding to the first inverter module. The second output windings are connected to the lower bridge arm drive circuit corresponding to the second inverter module after passing through a rectifier circuit. The second output windings are used to supply power to the corresponding lower bridge arm drive circuit of the second inverter module.

[0032] Specifically, the first drive power supply includes a first isolation transformer. The primary winding of the first isolation transformer is connected to the input power supply side, and the secondary side is provided with multiple output windings, including multiple first output windings and multiple second output windings. The multiple first output windings, after being rectified by a rectifier circuit, output a first DC drive voltage to provide operating power to the drive unit corresponding to the upper bridge arm of the first inverter module. The second output windings, after being rectified by a rectifier circuit, output a second DC drive voltage to provide operating power to the drive unit corresponding to the lower bridge arm of the second inverter module. Since the first isolation transformer simultaneously supplies power to different bridge arm drive circuits in different inverter modules, cross-power supply of the first drive power supply to the two inverter modules is achieved, improving the power utilization rate of the inverter drive power supply system and reducing the number of auxiliary drive power supplies.

[0033] See Figure 1As shown, the first drive power supply T1 includes a first isolation transformer, which has four secondary output windings, including three first output windings and one second output winding. The three first output windings are respectively rectified and connected to the U-phase upper bridge arm drive circuit (P1_HU), V-phase upper bridge arm drive circuit (P1_HV), and W-phase upper bridge arm drive circuit (P1_HW) of the first inverter module P1, providing drive voltage to the drive units corresponding to the upper bridge power switching devices of the three bridge arms of the first inverter module P1. The second output winding is rectified and connected to the lower bridge arm drive circuit of the second inverter module P3. Since the three lower bridge arm drive units of the second inverter module P3 share a common reference ground, the second output winding outputs a DC drive power supply after rectification, which is connected to the drive units corresponding to P3_LU, P3_LV, and P3_LW, providing a common drive voltage to the drive units corresponding to the three lower bridge power switching devices of the second inverter module P3.

[0034] Combination Figure 4As shown, the first driving power supply T1 includes a primary-side input control circuit, a first isolation transformer T201, and four output windings disposed on the secondary side of the first isolation transformer T201. The primary-side input control circuit is located in the lower left area of ​​the figure. It includes a drive control chip U201 and peripheral devices such as resistors and capacitors connected to it. It is used to receive the input power and generate a high-frequency switching signal to drive the first isolation transformer T201 to work, so as to isolate and transmit the primary-side electrical energy to each output winding on the secondary side. The secondary side of the first isolation transformer T201 includes three first output windings NS1, NS2, and NS3, and one second output winding NS4. The first output windings NS1, NS2, and NS3 are respectively rectified and filtered by corresponding rectifier circuits to form three independent DC drive power supplies, which output P1+15V_VH / P1_-8V_VH, P1_+15V_WH / P1_-8V_WH, and P1_+15V_UH / P1_-8V_UH, respectively, to provide isolation drive voltages for the V-phase upper bridge arm drive unit (P1_HV), W-phase upper bridge arm drive unit (P1_HW), and U-phase upper bridge arm drive unit (P1_HU) of the first inverter module P1. Each output includes a positive drive voltage, a negative drive voltage, and a corresponding reference ground to meet the drive voltage requirements when the upper bridge arm power switching devices are turned on and off. The second output winding NS4 is located in the upper left area of ​​the figure. It is a newly added secondary output winding in this embodiment. After passing through the rectifier and filter circuit composed of diodes D404 and D406, resistors, and capacitors, the second output winding NS4 outputs P3_+15V_F, P3_-8V_F, and P3_GND_F, providing a common isolated drive power supply for the corresponding drive units of the lower bridge arm of the second inverter module P3. Since the three lower bridge arm drive units of the second inverter module P3 share a common reference ground, the positive and negative drive voltages output by the second output winding NS4 can be simultaneously connected to the drive units corresponding to P3_LU, P3_LV, and P3_LW, providing drive voltages for the three lower bridge arm power switching devices. Therefore, the first drive power supply T1, through the four secondary output windings of the first isolation transformer T201, achieves a power supply mode that provides power to the upper arms of the three inverter modules and the lower arms of the other inverter module through three secondary output windings. Specifically, the three first output windings power the three upper arm drive units of the first inverter module P1, and the newly added second output winding provides a shared drive power supply to the three lower arm drive units of the second inverter module P3, thus forming part of the cross-drive power supply architecture. Correspondingly, the second drive power supply T2 adopts the same circuit structure, with its three output windings powering the three upper arm drive units of the second inverter module P3, and the newly added output winding providing a shared drive power supply to the three lower arm drive units of the first inverter module P1. Together, they achieve cross-drive power supply between the two inverter modules.

[0035] In this optional embodiment, by setting the first driving power supply to include a first isolation transformer, the first output winding and the second output winding of the first isolation transformer supply power to the upper bridge arm driving circuit of the first inverter module and the lower bridge arm driving circuit of the second inverter module, respectively. Therefore, one isolation transformer can simultaneously provide driving power to different bridge arms in the two inverter modules, which satisfies the isolation power supply requirements of the driving circuit while realizing cross power supply, reducing the number of isolated driving power supplies and improving the integration of the power supply structure.

[0036] Optionally, the second drive power supply includes a second isolation transformer, which includes a plurality of third output windings and a fourth output winding. The plurality of third output windings are respectively connected to the upper bridge arm drive circuit corresponding to the second inverter module after being rectified by a rectifier circuit. The plurality of third output windings are used to supply power to the upper bridge arm drive circuit corresponding to the second inverter module. The fourth output winding is connected to the lower bridge arm drive circuit corresponding to the first inverter module after being rectified by a rectifier circuit. The fourth output winding is used to supply power to the lower bridge arm drive circuit corresponding to the first inverter module.

[0037] Specifically, the second drive power supply includes a second isolation transformer, which includes multiple third output windings and a fourth output winding. The multiple third output windings, after being rectified by a rectifier circuit, provide drive voltage to the corresponding drive unit of the upper bridge arm of the second inverter module. The fourth output winding, after being rectified by a rectifier circuit, provides drive voltage to the corresponding drive unit of the lower bridge arm of the first inverter module. The first and second drive power supplies together form a cross-power supply structure. The first drive power supply is responsible for the drive power supply of the upper bridge arm of the first inverter module and the lower bridge arm of the second inverter module, and the second drive power supply is responsible for the drive power supply of the upper bridge arm of the second inverter module and the lower bridge arm of the first inverter module. When one drive power supply fails, the other drive power supply can still maintain the normal operation of the corresponding bridge arm drive circuit, enabling the inverter to enter a safe operating state according to a preset control strategy, thus improving the system's fault tolerance capability.

[0038] See Figure 1As shown, the second drive power supply T2 includes a second isolation transformer, which also has four secondary output windings, including three third output windings and one fourth output winding. The three third output windings are connected to the U-phase upper bridge arm drive circuit (P3_HU), V-phase upper bridge arm drive circuit (P3_HV), and W-phase upper bridge arm drive circuit (P3_HW) of the second inverter module P3 after passing through corresponding rectifier circuits, providing drive voltage to the drive units corresponding to the upper bridge power switching devices of the three bridge arms of the second inverter module P3, respectively. The fourth output winding is connected to the lower bridge arm drive circuit of the first inverter module P1 after passing through a rectifier circuit. After rectification, the fourth output winding outputs a DC drive power supply, which is connected to the drive units corresponding to P1_LU, P1_LV, and P1_LW, respectively, providing a common drive voltage to the drive units corresponding to the three lower bridge power switching devices of the first inverter module P1.

[0039] In this optional embodiment, the second driving power supply includes a second isolation transformer. The third and fourth output windings of the second isolation transformer supply power to the upper bridge arm drive circuit of the second inverter module and the lower bridge arm drive circuit of the first inverter module, respectively. Therefore, the second driving power supply and the first driving power supply together form a cross power supply structure, so that the driving power supply of the two inverter modules comes from different driving power supplies. When one driving power supply fails, the other driving power supply can still maintain the normal operation of the corresponding bridge arm drive circuit, thereby improving the fault tolerance capability of the system.

[0040] Optionally, both the first driving power supply and the second driving power supply include a rectifier circuit. The rectifier circuit is connected between the corresponding output winding and the driving unit. The rectifier circuit is used to convert the AC power output from the output winding into DC power to provide a driving voltage to the corresponding driving unit.

[0041] Specifically, since the output winding of the isolation transformer outputs AC voltage, both the first and second drive power supplies are equipped with rectifier circuits. These rectifier circuits are connected between the corresponding output winding and the drive unit, converting the AC power generated by the output winding into the DC power required by the drive unit. The rectifier circuit can be a diode rectifier circuit, a full-bridge rectifier circuit, or other rectifier structures capable of converting AC to DC; this embodiment does not limit this. The rectified DC power is output to the corresponding drive unit, providing a stable operating voltage for the drive chip, isolation drive circuit, and other devices, thereby ensuring that the drive unit can normally generate drive signals for the power switching devices.

[0042] In this optional embodiment, by setting both the first driving power supply and the second driving power supply to include rectifier circuits, the rectifier circuits can convert the AC power output from the output winding of the isolation transformer into the DC power required by the driving unit. Therefore, a stable working power supply can be provided for the driving unit, ensuring the normal operation of the driving unit and improving the power supply stability and reliability of the inverter driving power supply system.

[0043] Optionally, the first driving power supply and the second driving power supply output a positive driving voltage and a negative driving voltage, which are used to provide a turn-on driving voltage and a turn-off driving voltage for the corresponding driving unit.

[0044] Specifically, both the first and second drive power supplies output positive and negative drive voltages. The positive drive voltage is used to turn on the power switching devices, and the negative drive voltage is used to turn them off. Different types of power switching devices can use different drive voltages. For example, when the power switching device is an IGBT, the positive drive voltage can be +15V and the negative drive voltage can be -8V; when the power switching device is a silicon carbide MOSFET, the positive drive voltage can be +18V and the negative drive voltage can be -5V. Of course, the drive voltage can also be adjusted according to the parameter requirements of different models of power switching devices, and this invention does not limit this. The drive unit uses the positive and negative drive voltages to output corresponding drive signals according to the input PWM control signal, realizing the rapid turn-on and turn-off of the corresponding power switching devices, improving the switching performance of the inverter module and the reliability of system operation.

[0045] In this optional embodiment, since the first driving power supply and the second driving power supply can output positive driving voltage and negative driving voltage, and provide turn-on driving voltage and turn-off driving voltage for the corresponding driving units respectively, the driving power supply requirements of different types of power switching devices can be met, enabling the driving unit to stably control the power switching devices to turn on and off, thereby improving the stability and applicability of the inverter module.

[0046] An embodiment of the present invention provides a motor controller, including a first inverter module, a second inverter module, and the aforementioned inverter drive power supply system.

[0047] Optionally, the motor further includes a drive unit connected to the first inverter module and the second inverter module, and the drive unit is used to amplify the input PWM control signal.

[0048] Specifically, in combination Figure 5As shown, the motor controller also includes a drive unit, which includes at least an isolation drive circuit and may also include a fault detection circuit, a protection circuit, and a drive control circuit. The drive unit is connected to the first inverter module and the second inverter module respectively. The input terminal of the drive unit receives the PWM control signal output by the controller, and the output terminal is connected to the drive unit in the corresponding inverter module. The drive unit is used to amplify the PWM control signal and realize electrical isolation between the control side and the power side to improve the system's anti-interference capability and ensure electrical safety between the control circuit and the high-voltage power circuit. In this embodiment, the first inverter module and the second inverter module are respectively provided with a set of drive units. Each drive unit receives the PWM control signal of the corresponding inverter module and outputs the drive control signal of the corresponding bridge arm power switching device. The inverter drive power supply system provides drive power to the drive unit, enabling the drive unit to work stably.

[0049] In other embodiments, one driving unit may correspond to multiple driving channels, and the present invention does not limit this.

[0050] In this optional embodiment, by including a drive unit in the motor controller, the drive unit is used to amplify the input PWM control signal. Therefore, the driving capability of the PWM control signal can be improved, and electrical isolation between the control side and the power side can be achieved, reducing the interference of the high-voltage power circuit on the control circuit and improving the stability and safety of the motor controller operation.

[0051] Optionally, the drive unit is connected to the power switching devices in the first inverter module and the second inverter module. The drive unit is used to output a drive signal to the power switching devices according to the PWM control signal and to detect the operating status of the power switching devices.

[0052] Specifically, the drive unit is connected to multiple power switching devices in the first inverter module and the second inverter module respectively. The drive unit outputs a corresponding drive signal according to the received PWM control signal to control the conduction and turn-off of each power switching device. At the same time, the drive unit is also used to collect the operating status information of the power switching devices and feed back the corresponding status signal to the controller. The operating status information may include the conduction status, turn-off status, fault status and drive voltage status of the power switching devices.

[0053] Combination Figure 5As shown, P1 / P3 each represent an inverter, P1_PWM is the primary-side PWM control signal of inverter P1, and P3_PWM is the primary-side PWM control signal of inverter P3. T1 / T2 are the inverter drive power supply systems for dual inverters, each with four outputs, including three power supplies for the upper transistor of the bridge and one power supply for the lower transistor. In some embodiments, the drive unit can also integrate functions such as fault diagnosis, undervoltage protection, short-circuit detection, enable control, and reset control. When an abnormality is detected in the power switching device, the drive unit can output a fault signal so that the controller can execute the corresponding fault handling strategy. When a fault occurs in one auxiliary drive power supply, the controller can combine the cross-power supply structure of the inverter drive power supply system to control the corresponding power switching device to enter a preset safe operating state, thereby improving the fault tolerance capability of the motor controller.

[0054] In this optional embodiment, by connecting the drive unit to the power switching device and outputting the drive signal of the power switching device according to the PWM control signal, while detecting the operating status of the power switching device, it is possible not only to realize the drive control of the power switching device, but also to obtain the operating status of the power switching device in real time, providing a basis for fault diagnosis and protection control, and improving the operating reliability of the motor controller.

[0055] Optionally, both the first inverter module and the second inverter module include multiple power switching devices, which are connected to form a bridge inverter circuit. The first inverter module and the second inverter module are used to convert DC power into AC power and output it to the corresponding motor.

[0056] Specifically, both the first and second inverter modules include multiple power switching devices (e.g., P1_HU, etc.). These power switching devices are connected to form a bridge inverter circuit. Each inverter module may include three bridge arms, each including an upper bridge arm power switching device and a lower bridge arm power switching device, together forming a three-phase bridge inverter structure. The multiple power switching devices are connected to the drive unit respectively, and are turned on and off according to a preset control strategy under the action of a PWM control signal. The bridge inverter circuit receives DC power from the power battery and converts the DC power into three-phase AC power by controlling the conduction sequence of each power switching device, outputting it to the corresponding motor to achieve motor torque and speed control. The first and second drive power supplies provide cross-power to different drive units in the first and second inverter modules, respectively. When one auxiliary drive power supply fails, the other drive power supply can still maintain the normal operation of the corresponding bridge arm drive circuit, enabling the inverter module to enter a safe operating state such as active short circuit according to the control strategy, thereby meeting the system functional safety requirements, reducing the number of auxiliary drive power supplies, lowering system costs, and improving overall reliability.

[0057] In this optional embodiment, by configuring both the first and second inverter modules to form a bridge inverter circuit using multiple power switching devices, the input DC power can be converted into AC power to provide driving power for the motor. Combined with the cross-power supply structure of the inverter drive power supply system, even if one drive power supply fails, the power supply to the corresponding bridge arm drive circuit can still be maintained. This facilitates the inverter module entering a preset safe operating state, thereby improving the functional safety performance of the motor controller and the system reliability.

[0058] An embodiment of the present invention provides a vehicle including the aforementioned motor controller.

[0059] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. An inverter-driven power supply system, characterized in that, It includes a first driving power supply and a second driving power supply. The first driving power supply is connected to the first inverter module and the second inverter module respectively. The second driving power supply is connected to the first inverter module and the second inverter module respectively. The first driving power supply and the second driving power supply are used to cross-supply different driving units corresponding to the first inverter module and the second inverter module respectively.

2. The inverter drive power supply system according to claim 1, characterized in that, The first drive power supply includes a first isolation transformer, which includes multiple first output windings and second output windings. The multiple first output windings are respectively connected to the upper bridge arm drive circuit of the first inverter module after passing through a rectifier circuit. The multiple first output windings are used to supply power to the upper bridge arm drive circuit corresponding to the first inverter module. The second output windings are connected to the lower bridge arm drive circuit corresponding to the second inverter module after passing through a rectifier circuit. The second output windings are used to supply power to the corresponding lower bridge arm drive circuit of the second inverter module.

3. The inverter drive power supply system according to claim 1, characterized in that, The second drive power supply includes a second isolation transformer, which includes multiple third output windings and a fourth output winding. The multiple third output windings are respectively connected to the upper bridge arm drive circuit corresponding to the second inverter module after passing through a rectifier circuit. The multiple third output windings are used to supply power to the upper bridge arm drive circuit corresponding to the second inverter module. The fourth output winding is connected to the lower bridge arm drive circuit corresponding to the first inverter module after passing through a rectifier circuit. The fourth output winding is used to supply power to the lower bridge arm drive circuit corresponding to the first inverter module.

4. The inverter drive power supply system according to claim 1, characterized in that, Both the first driving power supply and the second driving power supply include a rectifier circuit. The rectifier circuit is connected between the corresponding output winding and the driving unit. The rectifier circuit is used to convert the AC power output from the output winding into DC power to provide driving voltage to the corresponding driving unit.

5. The inverter drive power supply system according to claim 1, characterized in that, The first driving power supply and the second driving power supply output positive driving voltage and negative driving voltage, which are used to provide turn-on driving voltage and turn-off driving voltage for the corresponding driving units.

6. A motor controller, characterized in that, It includes a first inverter module, a second inverter module, and the inverter drive power supply system as described in any one of claims 1 to 5.

7. The motor controller according to claim 6, characterized in that, It also includes a drive unit, which is connected to the first inverter module and the second inverter module, and is used to amplify the input PWM control signal.

8. The motor controller according to claim 7, characterized in that, The drive unit is connected to the power switching devices in the first inverter module and the second inverter module. The drive unit is used to output a drive signal to the power switching devices according to the PWM control signal and to detect the operating status of the power switching devices.

9. The motor controller according to claim 6, characterized in that, Both the first inverter module and the second inverter module include multiple power switching devices, which are connected to form a bridge inverter circuit. The first inverter module and the second inverter module are used to convert DC power into AC power and output it to the corresponding motor.

10. A vehicle, characterized in that, Includes the motor controller as described in any one of claims 6 to 9.

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