Motor control circuit, motor controller, electric drive assembly and vehicle

Abstract

The application relates to a motor control circuit, a motor controller, an electric drive assembly and a vehicle. The motor control circuit comprises a control module and a plurality of pre-drive modules, the pre-drive modules comprising single-phase motors and / or multi-phase motors; wherein the control module is connected with the plurality of pre-drive modules respectively to control the single-phase motors and / or the multi-phase motors. The motor control circuit, the motor controller, the electric drive assembly and the vehicle can solve the technical problem that, in the related art, a decentralized motor control mode is adopted, leading to repeated configuration of hardware resources, increased circuit board area and material cost.

Description

Technical Field

[0001] This application relates to the field of motor control technology, and in particular to a motor control circuit, a motor controller, an electric drive assembly, and a vehicle. Background Technology

[0002] In the electronic and electrical architecture of electric vehicles, the control method and application scenarios of DC motors have a significant impact on system performance and cost. Brushless DC motors (BLDC) and brushed DC motors are two common drive methods. Brushless DC motors typically use electronic commutators for precise control and are suitable for scenarios requiring high efficiency and precision, such as HVAC systems, power seat adjustments, and power windows. Brushed DC motors, on the other hand, use mechanical commutation, resulting in a relatively simpler control method. They are suitable for cost-sensitive scenarios with lower requirements for control precision, such as windshield wipers, door locks, and trunk opening.

[0003] However, current automotive DC motor control architectures still predominantly employ a distributed control approach, separating the control of brushless and brushed DC motors in the product load. Each motor requires a separate driver chip, control module, and current detection circuit, leading to redundant hardware resource configuration, complex early-stage chip and component selection, and hindering the shortening of development cycles. In multi-motor applications, this distributed control architecture significantly increases circuit board area and material costs, while also increasing production complexity and maintenance difficulty. Summary of the Invention

[0004] This application provides a motor control circuit, a motor controller, an electric drive assembly, and a vehicle to solve the technical problem in related technologies where the use of a distributed motor control method leads to redundant configuration of hardware resources, increasing circuit board area and material costs.

[0005] To achieve the above objectives, according to a first aspect of this application, a motor control circuit is provided, including a control module and a plurality of pre-drive modules, wherein the pre-drive modules include single-phase motors and / or multi-phase motors; wherein the control module is connected to the plurality of pre-drive modules respectively to control the single-phase motors and / or the multi-phase motors.

[0006] Optionally, the pre-drive module can be used individually or in cascades.

[0007] Optionally, the pre-drive module includes a three-phase pre-drive chip, and multiple pre-drive modules all use the same type of three-phase pre-drive chip.

[0008] Optionally, when the multiphase motor is a three-phase brushless motor, the three-phase pre-drive chip adopts a three-phase bridge connection; and / or, when the single-phase motor is a single-phase brushed motor, the two three-phase pre-drive chips adopt a single-phase bridge connection; and / or, when the multiphase motor is a multiphase DC motor, at least two three-phase pre-drive chips adopt a multiphase bridge connection.

[0009] Optionally, the three-phase pre-drive chip includes three gate drivers, and the single-phase brushed motor includes a first single-phase brushed motor, a second single-phase brushed motor, and a third single-phase brushed motor; wherein, two gate drivers of one three-phase pre-drive chip are respectively connected to the first single-phase brushed motor, two gate drivers of another three-phase pre-drive chip are respectively connected to the second single-phase brushed motor, and the remaining gate drivers of the two three-phase pre-drive chips are respectively connected to the third single-phase brushed motor.

[0010] Optionally, the pre-drive module includes a protection unit for real-time monitoring of the operating status of the single-phase motor and / or the multi-phase motor; and / or, when the operating status of the single-phase motor and / or the multi-phase motor is abnormal, sending an alarm signal to the control module; the operating status includes at least one of the following: current, voltage, and temperature.

[0011] Optionally, it further includes: a current sensor module connected to the control module, used to detect the operating current of the single-phase motor and / or the multi-phase motor in real time, and send the operating current of the single-phase motor and / or the multi-phase motor to the control module, so that the control module monitors the operating status of the single-phase motor and / or the multi-phase motor in real time.

[0012] Optionally, the control module is further configured to trigger a protection mechanism to cut off the power supply to the single-phase motor and / or the multi-phase motor when the operating state of the single-phase motor and / or the multi-phase motor is abnormal.

[0013] Optionally, the control module is connected to the pre-drive module via a communication bus, which includes at least one of the following: CAN bus, SPI bus, and I2C bus.

[0014] According to a second aspect of this application, a motor controller is provided, including the motor control circuit described above.

[0015] According to a third aspect of this application, an electric drive assembly is provided, including the motor controller described above.

[0016] According to a fourth aspect of this application, a vehicle is provided, including the electric drive assembly described above.

[0017] The motor control circuit of this application includes a control module and multiple pre-drive modules. The control module is connected to each of the pre-drive modules, and controls different types of motors through one pre-drive module and at least two cascaded pre-drive modules. That is, the embodiments of this application adopt a modular design, using a general-purpose pre-drive module as the core, which can be paired with MOS full-bridge or three-phase bridge modules of different parameters to achieve drive control of single-phase or multi-phase motors. The modular design allows a single pre-drive module to be used independently to drive a three-phase brushless motor; or multiple pre-drive modules can be cascaded to achieve centralized control of multiple single-phase brushed motors, two-phase motors, or four-phase motors. Unlike the distributed control architecture in related technologies, the modular design of this application significantly reduces the redundant configuration of hardware resources, lowers the circuit board area and material costs, and improves the integration and flexibility of the motor control circuit. This solves the technical problem of redundant hardware resource configuration and increased circuit board area and material costs caused by the distributed motor control method in related technologies.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of a distributed control architecture for multiple types of motors provided by related technologies; Figure 2 This is a schematic diagram of a motor control circuit provided in an embodiment of this application; Figure 3 This is a schematic diagram of a centralized control architecture for multiple types of motors provided in an embodiment of this application; Figure 4 This is a schematic diagram of the three-phase motor drive section in the centralized control architecture provided in the embodiments of this application; Figure 5 This is a schematic diagram of the brushed motor drive section in the centralized control architecture provided in the embodiments of this application; Figure 6(a) is a schematic diagram of the pre-driver chip portion in the centralized control architecture provided in the embodiments of this application; Figure 6(b) is a schematic diagram of the motor part in the centralized control architecture provided in the embodiment of this application. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] The current automotive DC motor control architecture still has some problems. Figure 1 This is a schematic diagram of a distributed control architecture for various types of motors provided by related technologies, such as... Figure 1 As shown, firstly, related technologies generally employ a distributed control approach, separating the control of brushless and brushed DC motors in the product load. Each motor requires a separate driver chip, control module, and current detection circuit, leading to redundant hardware resource configuration, complex early-stage chip and component selection, and hindering the shortening of the development cycle. In multi-motor applications, this distributed control architecture significantly increases circuit board area and material costs, while also increasing production complexity and maintenance difficulty. Secondly, the current detection scheme in the independent control module of the DC motor in the traditional distributed architecture typically uses high-cost sampling circuits, increasing material costs and circuit complexity. Furthermore, existing architectures are usually designed for a single type of motor, making it difficult to simultaneously support the mixed control requirements of brushed and brushless motors, limiting the system's flexibility and adaptability.

[0023] To achieve the above objectives, according to a first aspect of this application, a motor control circuit is provided. Figure 2 This is a schematic diagram of a motor control circuit provided in an embodiment of this application, as shown below. Figure 2 As shown, the motor control circuit includes a control module 21 and multiple pre-drive modules 23; wherein, the control module 21 is connected to the multiple pre-drive modules 23 respectively, and the pre-drive modules 23 include single-phase motors and / or multi-phase motors to control single-phase motors and / or multi-phase motors. Optionally, the pre-drive modules 23 can be used individually and / or multiple pre-drive modules 23 can be cascaded.

[0024] The aforementioned control module 21 includes, but is not limited to, a microcontroller unit; the aforementioned pre-drive module 23 includes, but is not limited to, a three-phase pre-drive chip.

[0025] In this embodiment, the motor control circuit adopts a modular design, with a general-purpose pre-drive module as its core. It can be paired with MOS full-bridge or three-phase bridge modules of different parameters to achieve drive control of single-phase or multi-phase motors. The modular design allows a single pre-drive module to be used independently to drive a three-phase brushless motor; or multiple pre-drive modules can be cascaded to achieve centralized control of multiple single-phase brushed motors, two-phase motors, or four-phase motors. Unlike the distributed control architecture in related technologies, the modular design of this application significantly reduces the redundant configuration of hardware resources, lowers circuit board area and material costs, while improving the integration and flexibility of the motor control circuit.

[0026] In some embodiments, the pre-drive module 23 includes a three-phase pre-drive chip, and multiple pre-drive modules 23 all use the same type of three-phase pre-drive chip. Optionally, when the multi-phase motor is a three-phase brushless motor, the three-phase pre-drive chips are connected in a three-phase bridge configuration; and / or, when the single-phase motor is a single-phase brushed motor, the two three-phase pre-drive chips are connected in a single-phase bridge configuration; and / or, when the multi-phase motor is a multi-phase DC motor, at least two three-phase pre-drive chips are connected in a multi-phase bridge configuration.

[0027] In this application embodiment, multiple pre-drive modules all employ a general-purpose three-phase pre-drive chip as the core control unit. Through flexible parameter configuration, it supports drive control of three-phase brushless motors, single-phase brushed motors, and multi-phase DC motors such as two-phase and four-phase motors. The three-phase pre-drive chip integrates drive logic, overcurrent protection, and short-circuit protection functions, significantly simplifying external circuit design. Unlike related technologies that require different drive chips and control modules for different types of motors, this application achieves unified control of different motor types through a general-purpose three-phase pre-drive chip, significantly reducing hardware types and material costs, while improving the integration and reliability of the motor control circuit.

[0028] In some embodiments, the three-phase pre-drive chip includes three gate drivers, and the single-phase brushed motor includes a first single-phase brushed motor, a second single-phase brushed motor, and a third single-phase brushed motor; wherein, two gate drivers of one three-phase pre-drive chip are respectively connected to the first single-phase brushed motor, two gate drivers of another three-phase pre-drive chip are respectively connected to the second single-phase brushed motor, and the remaining gate drivers of the two three-phase pre-drive chips are respectively connected to the third single-phase brushed motor.

[0029] In the embodiments of this application, one three-phase pre-drive chip drives the first single-phase brushed motor, another three-phase pre-drive chip drives the second single-phase brushed motor, and the two three-phase pre-drive chips jointly drive the third single-phase brushed motor, thereby achieving the effect of two three-phase pre-drive chips driving three single-phase brushed motors.

[0030] In some embodiments, the pre-drive module 23 includes a protection unit for real-time monitoring of the operating status of the single-phase motor and / or multi-phase motor; and / or, sending an alarm signal to the control module 21 when the operating status of the single-phase motor and / or multi-phase motor is abnormal; the operating status includes at least one of the following: current, voltage, and temperature. The control module 21 is also used to trigger a protection mechanism to cut off the power supply to the single-phase motor and / or multi-phase motor when the operating status of the single-phase motor and / or multi-phase motor is abnormal.

[0031] In this embodiment, a control module enables real-time monitoring of the pre-drive module's operating status; sensor signals or AD sampling signals enable real-time diagnosis of the motor's operating status, such as detecting abnormal states like overcurrent, overvoltage, and overtemperature. Unlike the distributed control architectures in related technologies, which typically lack unified communication and diagnostic functions, this application integrates communication and diagnostic functions to achieve centralized monitoring and management of multi-motor systems, significantly improving the reliability and maintenance efficiency of the motor control circuit.

[0032] In some embodiments, the system further includes: a current sensor module connected to the control module 21, used to detect the operating current of the single-phase motor and / or multi-phase motor in real time, and send the operating current of the single-phase motor and / or multi-phase motor to the control module, so that the control module 21 monitors the operating status of the single-phase motor and / or multi-phase motor in real time.

[0033] In this embodiment, a low-cost current sensor is used as a diagnostic tool to replace the traditional current sampling circuit. The current sensor integrates the Hall effect principle to detect the motor's operating current in real time and transmits the signal to the control module. Unlike existing technologies that typically use high-cost sampling circuits for current detection, this application replaces the current sampling circuit with a low-cost current sensor, significantly reducing material costs while improving the diagnostic efficiency and reliability of the motor control circuit.

[0034] In some embodiments, the control module 21 is connected to the pre-drive module 23 via a communication bus, which includes at least one of the following: CAN bus, SPI bus, and I2C bus.

[0035] The aforementioned pre-driver module includes a communication unit. The control module is connected to the communication unit of the pre-driver module via a communication bus. The communication bus can be any one of CAN bus, SPI bus, or I2C bus.

[0036] In addition, the pre-drive module includes a power management unit for managing the power required by the pre-drive module and the switching transistors. The pre-drive module also includes a logic control unit for receiving control signals from the control module and converting these signals into drive signals to control the motor.

[0037] In some embodiments, the operating voltage range of the pre-drive module 23 is not less than 100V.

[0038] In this embodiment, the pre-drive module can operate at a voltage range of up to 100V, supporting wide voltage and high-power loads. By flexibly selecting the parameters of the bridge drive MOSFET (such as withstand voltage and on-resistance), it can adapt to motors with different power requirements. Unlike related technologies that typically require dedicated driver chips and control modules for high-voltage, high-power motors, this application achieves support for wide voltage and high-power loads through flexible selection of MOSFET bridge parameters, significantly improving the adaptability and cost-effectiveness of the motor control circuit.

[0039] The embodiments of this application will be described in detail below using a centralized control architecture for multiple types of motors as an example.

[0040] To address the technical problems this application aims to solve, this application proposes a modular on-board DC motor control architecture. This module uses a versatile three-phase pre-drive chip as its core, paired with MOS full-bridge or three-phase bridges of different parameters to drive single-phase or multi-phase motors. Because its operating voltage range reaches 100V and the selection of bridge drive MOS is flexible, this module has a wide applicable load power range and strong adaptability. It can be designed as a modular drive circuit, flexibly combined and configured to adapt to different application scenarios. When used alone, this module can drive a three-phase motor; when operating in a multi-chip cascade mode, it can control multiple single-phase brushed or two-phase, four-phase, and other multi-phase DC motors. The module includes communication and diagnostic functions; its operating status is controlled by the main control MCU, and the diagnostic module can receive sensor signals or AD sampling signals.

[0041] This general-purpose modular control circuit is suitable for electrical architectures that centrally control multiple motors. By centralizing multiple motor loads on the circuit board, the utilization efficiency of hardware resources is significantly optimized. This centralized control architecture reduces redundant hardware configuration, lowers circuit board area and material costs, and improves system integration. Simultaneously, this application uses a low-cost current sensor as a diagnostic tool, replacing traditional sampling circuits, significantly reducing material costs while improving system diagnostic efficiency and reliability. Furthermore, this architecture can simultaneously support the drive control of three-phase brushless motors and single-phase brushed motors, meeting the needs of multiple motor types coexisting in automotive systems and enhancing system flexibility and adaptability. Through these improvements, this application not only enhances system integration and flexibility but also significantly reduces costs, demonstrating high practicality and market application value.

[0042] Figure 3 This is a schematic diagram of the centralized control architecture for multiple types of motors provided in the embodiments of this application, such as... Figure 3As shown, this general-purpose three-phase pre-drive chip is cascaded to form a centralized control architecture for multiple types of motors, achieving unified control of various DC motors through modular design. This architecture includes a main control MCU (microcontroller unit), multiple pre-drive circuits (a1, a2, a3, ..., an), and different types of motors (such as brushless motors, single-phase brushed motors, multi-phase motors, etc.). Each pre-drive circuit uses the same type of pre-drive chip, achieving precise control of different motor types through different connection methods. For example, pre-drive circuit a1 uses a three-phase bridge connection to control a three-phase brushless motor; pre-drive circuits a2 and a3 use a single-phase bridge connection to control a single-phase brushed motor; and pre-drive circuit a*n uses a multi-phase bridge connection to control two-phase or multi-phase motors. The main control MCU connects to all pre-drive circuits via a communication bus (such as CAN bus, SPI bus, I2C bus, etc.) to achieve centralized control and management of multiple motors. The main control MCU is responsible for sending control commands, receiving motor status feedback, and dynamically adjusting the operating parameters of each motor as needed. Furthermore, each pre-drive circuit integrates a diagnostic module that can monitor the motor's operating status (such as current, voltage, and temperature) in real time and send alarm signals to the main control MCU when an abnormality is detected (such as overcurrent, overvoltage, or overtemperature). This modular design and unified main control MCU control significantly reduce redundant hardware resource configuration, lower circuit board area and material costs, while improving system integration, flexibility, and reliability.

[0043] Figure 4 This is a schematic diagram of the three-phase motor drive section in the centralized control architecture provided in this application embodiment, as shown below. Figure 4As shown, this section adopts a modular design, achieving efficient driving and precise control of the three-phase brushless motor. The three-phase motor drive section includes a pre-drive circuit, a MOS bridge, a communication bus, and an integrated diagnostic module. The pre-drive circuit uses a single type of three-phase pre-drive chip, which can adapt to three-phase brushless motors with different voltage and power requirements through flexible parameter configuration. The MOS bridge selects appropriate MOS transistor parameters (such as withstand voltage and on-resistance) according to the motor's power requirements to ensure the stability and reliability of the drive circuit. The main control MCU is connected to the pre-drive circuit through the communication bus to achieve centralized control and management of the three-phase motor. The main control MCU sends PWM signals and FOC (Field Oriented Control) algorithm parameters to the pre-drive circuit to control the speed and torque output of the three-phase brushless motor. At the same time, the pre-drive circuit monitors the motor's operating status in real time through the integrated diagnostic module, such as current, voltage, and temperature, and feeds the data back to the main control MCU. When an abnormal state (such as overcurrent, overvoltage, or overtemperature) is detected, the pre-drive circuit triggers a protection mechanism and sends an alarm signal to the main control MCU to ensure the safe operation of the system. This modular design and centralized control architecture allows a single pre-drive circuit to be used independently to drive a three-phase brushless motor; alternatively, multiple modules can be cascaded to achieve centralized control of multiple three-phase brushless motors.

[0044] Figure 5 This is a schematic diagram of the brushed motor drive section in the centralized control architecture provided in this application embodiment, as shown below. Figure 5As shown, this architecture can drive three H-bridges, thereby achieving precise control of three brushed DC motors. By employing a dedicated current sensor chip for current detection and diagnosis, and managing it uniformly through a single main control MCU, this invention achieves high integration, high reliability, and flexible control functions. The system architecture includes a main control MCU, two three-phase pre-drive chips, three H-bridges, three brushed DC motors, and dedicated current sensor chips. The main control MCU is the core of the entire system, responsible for sending control commands, receiving feedback signals, and coordinating the operation of the entire system. The two three-phase pre-drive chips work together through flexible configuration to drive the three H-bridges. Each H-bridge consists of four MOSFETs used to control the forward and reverse rotation of the motors. The three H-bridges are connected to the three brushed DC motors respectively, and each H-bridge output is equipped with a dedicated current sensor chip for real-time detection of the motor's operating current. The control logic is jointly implemented by the main control MCU, the three-phase pre-drive chips, and the current sensors. The main control MCU sends control commands to the two three-phase pre-drive chips via PWM signals to adjust the motor speed and direction, and receives current data from the current sensor chips via a communication bus to monitor the motor's operating status in real time. When the current sensor detects abnormal conditions such as overcurrent or short circuit, the main control MCU will trigger the protection mechanism to cut off the motor power supply. The three-phase pre-drive chip drives the DC brushed motor by controlling the on / off state of the MOSFETs in the H-bridge, and has overcurrent and short-circuit protection functions to ensure system safety.

[0045] Figure 6(a) is a schematic diagram of the pre-driver chip part in the centralized control architecture provided in the embodiment of this application, and Figure 6(b) is a schematic diagram of the motor part in the centralized control architecture provided in the embodiment of this application. As shown in Figures 6(a) and 6(b), the two sets of GATE DRIVERs of the pre-driver chip U1, GHA\GLA and GHB\GLB, drive the two half-bridges a and b of the BDC motor 1 to realize the control of the motor 1; the remaining third set of GATE DRIVERs, GHC\GLC, drives the a phase of the BDC motor 3. Similarly, the two sets of GATE DRIVERs of the pre-driver chip U2, GHA\GLA and GHB\GLB, drive the two half-bridges a and b of the BDC motor 2 to realize the control of the motor 2; the remaining third set of GATE DRIVERs, GHC\GLC, drives the b phase of the BDC motor 3. Thus, U1 and U2 jointly drive the motor 3, realizing the effect of two chips driving three BDC motors.

[0046] To reduce the overall hardware BOM (Bill of Materials) during cascading, each H-bridge is equipped with a dedicated current sensor chip at its output for real-time monitoring of the motor's operating current. This dedicated current sensor chip utilizes the Hall effect principle to detect the current output of the H-bridge in real time, converting the current signal into a digital signal and transmitting it to the main control MCU. This design not only improves the accuracy of current detection but also simplifies circuit design, avoiding the complexity of traditional sampling circuits. When abnormal conditions such as overcurrent or overvoltage are detected, the current sensor sends an alarm signal to the main control MCU to ensure the safe operation of the system.

[0047] In a centralized control architecture for brushed DC motors based on two three-phase pre-drive chips, when driving multiple H-bridges and motors in a cascaded manner, it is important to note that when one motor triggers overcurrent protection, some phases of other motors driven by the same pre-drive chip may also be shut down, causing these motors to malfunction or stop working. Since multiple H-bridges and motors are connected to the same pre-drive chip, a motor triggering overcurrent protection will cause that chip to shut down all outputs, including some phases of other motors. Therefore, motor load distribution must be arranged according to the actual application situation to ensure compliance with requirements.

[0048] According to a second aspect of this application, a motor controller is provided, including the motor control circuit described above. Since the motor controller in this embodiment includes the aforementioned motor control circuit, it possesses all the technical effects of the motor control circuit. As the technical effects of the motor control circuit have already been described in detail above, they will not be repeated here.

[0049] According to a third aspect of this application, an electric drive assembly is provided, including the motor controller described above. Since the electric drive assembly in this embodiment includes the aforementioned motor controller, it inherits all the technical effects of the motor controller. As the technical effects of the motor controller have been described in detail above, they will not be repeated here.

[0050] According to a fourth aspect of this application, a vehicle is provided, including the electric drive assembly described above. The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it. Since the vehicle in this embodiment includes the electric drive assembly described above, the vehicle includes all the technical effects of the electric drive assembly described above. Since the technical effects of the electric drive assembly have been described in detail above, they will not be repeated here.

[0051] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0054] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A motor control circuit, characterized in that, The device includes a control module and multiple pre-drive modules, each pre-drive module containing a single-phase motor and / or a multi-phase motor; wherein the control module is connected to each of the multiple pre-drive modules to control the single-phase motor and / or the multi-phase motor.

2. The motor control circuit according to claim 1, characterized in that, The pre-drive module can be used individually or in cascades.

3. The motor control circuit according to claim 1, characterized in that, The pre-drive module includes a three-phase pre-drive chip, and multiple pre-drive modules all use the same type of three-phase pre-drive chip.

4. The motor control circuit according to claim 3, characterized in that, When the multiphase motor is a three-phase brushless motor, the three-phase pre-drive chip adopts a three-phase bridge connection; and / or, When the single-phase motor is a single-phase brushed motor, the two three-phase pre-drive chips are connected in a single-phase bridge configuration; and / or, When the multiphase motor is a multiphase DC motor, at least two of the three-phase pre-drive chips are connected in a multiphase bridge manner.

5. The motor control circuit according to claim 4, characterized in that, The three-phase pre-drive chip includes three gate drivers, and the single-phase brushed motor includes a first single-phase brushed motor, a second single-phase brushed motor, and a third single-phase brushed motor; wherein, two gate drivers of one three-phase pre-drive chip are respectively connected to the first single-phase brushed motor, two gate drivers of another three-phase pre-drive chip are respectively connected to the second single-phase brushed motor, and the remaining gate drivers of the two three-phase pre-drive chips are respectively connected to the third single-phase brushed motor.

6. The motor control circuit according to claim 1, characterized in that, The pre-drive module includes a protection unit for real-time monitoring of the operating status of the single-phase motor and / or the multi-phase motor; and / or, when the operating status of the single-phase motor and / or the multi-phase motor is abnormal, sending an alarm signal to the control module; the operating status includes at least one of the following: current, voltage, and temperature.

7. The motor control circuit according to claim 1, characterized in that, Also includes: A current sensor module, connected to the control module, is used to detect the operating current of the single-phase motor and / or the multi-phase motor in real time, and send the operating current of the single-phase motor and / or the multi-phase motor to the control module, so that the control module can monitor the operating status of the single-phase motor and / or the multi-phase motor in real time.

8. The motor control circuit according to claim 7, characterized in that, The control module is also used to trigger a protection mechanism to cut off the power supply to the single-phase motor and / or the multi-phase motor when the operating state of the single-phase motor and / or the multi-phase motor is abnormal.

9. The motor control circuit according to any one of claims 1 to 8, characterized in that, The control module is connected to the pre-drive module via a communication bus, which includes at least one of the following: CAN bus, SPI bus, and I2C bus.

10. A motor controller, characterized in that, Includes the motor control circuit as described in any one of claims 1 to 9.

11. An electric drive assembly, characterized in that, Includes the motor controller as described in claim 10.

12. A vehicle, characterized in that, Includes the electric drive assembly as described in claim 11.

Images