CN116533773A

CN116533773A - Motor control system, motor control method, electronic equipment and vehicle

Info

Publication number: CN116533773A
Application number: CN202310506555.2A
Authority: CN
Inventors: 谭曦
Original assignee: Deep Blue Automotive Technology Co ltd
Current assignee: Deep Blue Automotive Technology Co ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-08-04

Abstract

The invention relates to the technical field of electric automobiles, and provides a motor control system, a motor control method, electronic equipment and a vehicle. The motor control system includes: the system comprises a micro control module, a vehicle control module, a power management module, a logic processing module and a driving module. Wherein, the micro control module outputs a micro control signal; the vehicle control module is used for monitoring the wheel speed of the vehicle and generating a wheel speed signal; the logic processing module is electrically connected with the micro control module and the vehicle control module; the driving module is electrically connected with the logic processing module and is used for driving the power module; the power management module is electrically connected with the micro control module, the logic processing module and the driving module and outputs a power management signal to the logic processing module. According to the motor control system, the wheel speed signals monitored by the vehicle control module are integrated into the motor control system, so that the motor control system can still judge to enter the most proper safety state based on the input wheel speed signals under the condition that the chip fails.

Description

Motor control system, motor control method, electronic equipment and vehicle

Technical Field

The application relates to the technical field of electric automobiles, in particular to a motor control system, a motor control method, electronic equipment and a vehicle.

Background

With the rapid development of the automobile electronic industry in recent years, especially the new energy and intellectualization of automobiles, the essence of automobiles is changed into an electronic control system instead of mechanical machines, and the failure of the electronic system is very likely to cause traffic accidents, personal injury or death, so that the functional safety is an important requirement of new design of automobile types.

In the electronic control system, the motor control system bears the power control function of the electric automobile, and the motor control system mainly surrounds the torque of the three-phase motor to realize safety control. Currently, the main current safety states of motor control systems are active short circuit (ASC, active short circuit) and Freewheeling (Freewheeling) modes. However, when the motor control system fails to enter a safe state, the active short circuit and the freewheeling mode in the safe state have larger reverse torque when the motor outputs at a low speed and at a high speed respectively, generate high-strength reaction potential, easily destroy an electronic control system connected with the motor, and seriously affect the safety performance of a vehicle.

Aiming at the technical problem, the prior art has the following solutions: in the first prior art (CN 107910852B), two shutdown paths are configured, the first shutdown path includes two contactors, and the two contactors are connected to three phases of the motor for the vehicle and are respectively disposed between two UV phases and two VW phases of the motor for the vehicle; the output end of the second turn-off path is connected with the IGBT of the vehicle motor, turn-off control of the vehicle motor torque is realized by controlling turn-on and turn-off of an upper three bridge and a lower three bridge of the IGBT, and the rotating speed signal is obtained through the rotary transformer to judge whether the vehicle motor enters the two safety states. The scheme belongs to the traditional safety control technology, and the situation that the control system cannot enter a proper safety state due to the loss of signals of the rotating speed after the single chip microcomputer or the rotary transformer fails is not considered. In the second prior art, a logic circuit module is configured, an overvoltage signal is added based on a traditional logic control module, and the overvoltage signal can ensure that a motor controller cannot be damaged due to counter electromotive force generated by a motor rotating at a high speed after a chip fails. The scheme protects the safety of the motor controller, but does not consider the influence of the performance of the whole vehicle.

Therefore, there is a need to provide a motor control system, a motor control method, an electronic device and a vehicle, so as to achieve both the performance and the safety objective of the whole vehicle, thereby solving the above problems.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a motor control system, a method, an electronic device and a vehicle, wherein when the motor control system enters a safe state, the motor can be controlled to enter an active short circuit or a freewheeling mode based on the current wheel rotation speed, so that the reverse torque output by the motor is always maintained at a lower level, thereby solving the technical problem that the motor control system in the prior art cannot achieve the overall vehicle performance and the safety purpose.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the invention provides a motor control system which comprises a micro control module, a vehicle control module, a power management module, a logic processing module and a driving module.

Wherein, the micro control module outputs a micro control signal; the vehicle control module is used for monitoring the wheel speed of the vehicle and generating a wheel speed signal based on the wheel speed of the vehicle; the wheel speed signal is a high wheel speed signal when the wheel speed of the vehicle is larger than or equal to a preset wheel speed, and is a low wheel speed signal when the wheel speed of the vehicle is smaller than the preset wheel speed; the logic processing module is electrically connected with the micro control module and the vehicle control module; the driving module is electrically connected with the logic processing module and is used for driving the power module; the power management module is electrically connected with the micro control module, the logic processing module and the driving module and outputs a power management signal to the logic processing module;

the motor control system is configured to drive the driving module into a pulse width modulation state or a safety state according to the micro control signal, the wheel speed signal and the power management signal; in the safe state, the logic processing module is configured to drive the driving module into an active short circuit mode when the wheel speed signal is a high wheel speed signal, and drive the driving module into a freewheeling mode when the wheel speed signal is a low wheel speed signal.

In an embodiment of the invention, the preset wheel speed is a wheel speed corresponding to when the output torque of the motor in the active short circuit mode and the freewheeling mode is the same.

In an embodiment of the present invention, the micro control signal output by the micro control module includes a first pulse width modulation signal, a first enable signal, a first high-side safety signal and a first low-side safety signal, and the logic processing module receives the first pulse width modulation signal, the first enable signal, the first high-side safety signal, the first low-side safety signal, the wheel speed signal and the power management signal and performs logic processing to obtain and output a second pulse width modulation signal, a second high-side safety signal and a second low-side safety signal to the driving module, so that the driving module enters a pulse width modulation state or a safety state.

In an embodiment of the present invention, the micro control module receives a driving control instruction of an upper computer and a detection feedback signal of a detection module, and regulates states of the first pulse width modulation signal, the first enable signal, the first high-side safety signal and the first low-side safety signal according to the driving control instruction or the detection feedback signal, and the power management module receives the detection feedback signal of the detection module and the feedback signal of the micro control module, regulates the states of the power management signal according to the detection feedback signal and the feedback signal, and combines logic processing of the logic processing module to enable the driving module to enter a pulse width modulation state or a safety state.

In an embodiment of the invention, the logic processing module includes a first logic processing unit, and the first logic processing unit performs an and operation on the first pulse width modulation signal and the first enable signal to obtain and output the second pulse width modulation signal to the driving module.

In an embodiment of the present invention, the logic processing module includes a second logic processing unit, where the second logic processing unit performs an and operation on the first high-side safety signal and the power management signal to obtain and output a second high-side safety signal to the driving module; and the second logic processing unit performs AND operation on the wheel speed signal, the first low-side safety signal and the power management signal to obtain and output a second low-side safety signal to the driving module.

In an embodiment of the invention, the driving module is in a freewheeling mode when the second high-side safety signal and the second low-side safety signal are both at a low level, and the driving module is in an active short-circuit mode when the second high-side safety signal or the second low-side safety signal is at a low level.

In an embodiment of the present invention, the second logic processing unit includes a two-input logic and gate and a three-input logic and gate, where the logic and gate inputs the first high-side safety signal and the power management signal, and outputs a second high-side safety signal; the logic AND gate inputs the wheel speed signal, the first low-side safety signal and the power management signal, and outputs a second low-side safety signal.

In one embodiment of the invention, the vehicle control module is electrically connected to the logic processing module via a low voltage plug.

In another aspect, the present invention provides a motor control method including:

the motor control system drives the driving module to enter a pulse width modulation state or a safety state through the logic processing module based on the micro control signal and the power management signal state;

when the motor control system is in a safe state, if the wheel speed signal generated by the vehicle control module is a high wheel speed signal, the driving module is driven to enter an active short circuit mode through the logic processing module; and if the wheel speed signal generated by the vehicle control module is a low wheel speed signal, driving the driving module to enter a freewheeling mode through the logic processing module.

In another aspect, the present invention provides an electronic device, including a power module and a power module controller, where the power module controller drives and controls the power module; the power module controller is the motor control system of any one of the above examples, or performs safe driving control on the power module by adopting the motor control method of any one of the above examples.

In another aspect, the present invention provides a vehicle in which the electronic apparatus according to any one of the above examples is provided.

The invention has the beneficial effects that: according to the motor control system provided by the invention, based on a simple logic circuit structural design, the wheel speed signal monitored by the vehicle control module is integrated into the motor control system, so that the motor control system can still judge to enter the most proper safety state based on the input wheel speed signal under the condition that a chip fails, the reverse torque generated by the motor under the safety state is ensured to be always maintained at a lower level, the whole vehicle and the safety new energy of the vehicle are considered, the safety and the reliability of the product of the motor control system are improved, and the safe power output under the condition that the four-wheel-drive new energy vehicle fails is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic diagram of a motor control system according to an exemplary embodiment of the present application;

FIG. 2 is a circuit diagram illustrating a first logical processing unit of FIG. 1 in accordance with an exemplary embodiment of the present application;

FIG. 3 is a circuit diagram illustrating a second logical processing unit of FIG. 1 in accordance with an exemplary embodiment of the present application;

FIG. 4 is a schematic diagram of an exemplary embodiment of the application showing the relationship between output torque and wheel speed of the motor in active short circuit and freewheeling modes;

fig. 5 is a flow chart diagram illustrating a motor control method according to an exemplary embodiment of the application.

Description of element reference numerals

1. A vehicle control module; 2. a micro control module; 3. a logic processing module; 31. a first logic processing unit; 32. a second logic processing unit; 4. a power management module; a 41 power management unit; 42. a watchdog unit; 5. a driving module; 6. a low-voltage plug-in connector.

Detailed Description

Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In the following description, numerous details are set forth in order to provide a more thorough explanation of embodiments of the present invention, it will be apparent, however, to one skilled in the art that embodiments of the present invention may be practiced without these specific details, in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the present invention.

As described in the foregoing background, the inventors have studied to find: the four-wheel drive new energy automobile requires that one motor control system can continue driving by the other motor control system after being in fault, and the fault motor is controlled by the motor control system to enter a safe state so as to avoid influencing the driving function of the other motor on the automobile. At present, the main current safety state of the motor control system for driving the motor is provided with an active short circuit (ASC, active short circuit) mode and a Freewheeling (Freewheel) mode, however, the two modes in the safety state have own safety risks, wherein the active short circuit mode has larger reverse torque when the motor is output at a low speed, the Freewheeling mode has larger reverse torque when the motor is output at a high speed, and the two conditions can generate high-strength reaction potential at the motor end, and the high-strength reaction potential is conducted through a motor control circuit in a high-strength reverse current mode to damage the motor control system, so that the safety performance of the vehicle is seriously influenced.

Based on the above, the invention provides a motor logic control scheme taking the whole vehicle performance and the safety target into consideration, and the scheme combines a simple logic circuit design, integrates the wheel speed signal monitored by the vehicle control module into the motor control system, so that the motor control system can still judge to enter the most proper safety state based on the input wheel speed signal under the condition of chip failure, thereby improving the safety and reliability of a motor controller product and ensuring the safe power output under the condition of failure of a four-wheel drive new energy vehicle.

Specifically, referring to fig. 1, the present invention provides a motor control system, which includes: a micro control module 2, a vehicle control module 1, a power management module 4, a logic processing module 3 and a driving module 5.

As shown in fig. 1, the motor control system includes a vehicle control module 1 and a motor controller, and the vehicle control module 1 is communicatively connected to the motor controller.

The vehicle control module 1 is configured to monitor a vehicle wheel speed and generate a wheel speed signal output to a motor controller based on the real-time monitored vehicle wheel speed, the state of the wheel speed signal including a high wheel speed signal and a low wheel speed signal. The wheel speed signal is generated as a high wheel speed signal when the vehicle control module 1 monitors that the wheel speed of the vehicle is larger than or equal to a preset wheel speed, and is generated as a low wheel speed signal when the vehicle control module 1 monitors that the wheel speed of the vehicle is smaller than the preset wheel speed.

The motor controller comprises a micro-control module 2, a power management module 4, a logic processing module 3 and a driving module 5, wherein the micro-control module 2 outputs micro-control signals; the power management module 4 is electrically connected with the micro-control module 2, the logic processing module 3 and the driving module 5, the power management module 4 provides working voltages for the micro-control module 2, the logic processing module 3 and the driving module 5, and particularly outputs power management signals to the logic processing module 3, and the power management module 4 is connected with the micro-control module 2; the logic processing module 3 is electrically connected with the micro control module 2 and the vehicle control module 1 and receives micro control signals sent by the micro control module 2 and wheel speed signals sent by the vehicle control module 1; the driving module 5 is electrically connected with the logic processing module 3 and is used for driving and controlling the power module to enter a pulse width modulation state or a safety state.

Wherein the motor control system is configured to drive the drive module 5 into a pulse width modulated state or a safe state in dependence on the micro control signal, the wheel speed signal and the power management signal state. Specifically, the micro control signal output by the micro control module 2 includes a first pulse width modulation signal, a first enable signal, a first high-side safety signal and a first low-side safety signal, and the logic processing module 3 receives the first pulse width modulation signal, the first enable signal, the first high-side safety signal, the first low-side safety signal, the wheel speed signal and the power management signal and performs logic processing to obtain and output a second pulse width modulation signal, a second high-side safety signal and a second low-side safety signal to the driving module 5, so that the driving module 5 enters a pulse width modulation state or a safety state.

For example, in some embodiments, the motor control system is configured to logically process the micro control signal, the wheel speed signal, and the power management signal by the logic processing module 3 to output a valid second pulse width modulation signal to the driving module 5 to control the driving module 5 to enter the pulse width modulation state when the power management signal is in a normal state (e.g., high level); when the state of the power management signal is abnormal (such as low level), the micro control signal, the wheel speed signal and the power management signal are logically processed by the logic processing module 3 to output a valid second high-side safety signal and a second low-side safety signal to the driving module 5 so as to control the driving module 5 to enter a safety state.

In addition, as shown in fig. 4, in the safety state, the motor generates torque in the active short circuit mode or the freewheeling mode to influence the running of the four-wheel drive vehicle after the fault, in particular, the torque output by the motor in the active short circuit mode is larger at a low rotation speed and decreases along with the rising of the rotation speed; the torque output by the motor in the freewheeling mode is small at low rotational speeds and rises as the rotational speed rises. Therefore, in order to keep the motor torque to be minimum in the safe state, in the safe mode, the wheel speed signal is taken as a judgment reference, and in the motor control system, the logic processing module 3 is configured to drive the driving module 5 to enter an active short-circuit mode with high rotating speed and low torque when the wheel speed signal is a high wheel speed signal, and drive the driving module 5 to enter a freewheeling mode with low rotating speed and low torque when the wheel speed signal is a low wheel speed signal. The configuration mode ensures that the motor control system can control the motor to enter a mode with lower output torque no matter how the current motor output rotating speed is, so that the safety performance is considered under the condition that the normal running of the vehicle is not influenced.

In some embodiments, as shown in fig. 4, the vehicle controller distinguishes between a preset wheel speed that generates a high wheel speed signal and a low wheel speed signal as the wheel speed to which the motor corresponds when outputting the same torque in the active short circuit mode and the freewheeling mode.

In detail, as shown in fig. 1, the power management module 4 includes:

the power management unit 41 receives a power voltage (not shown in the figure) and converts the power voltage to obtain working voltages with various specifications, and provides the working voltages for the micro control module 2, the logic processing module 3 and the driving module 5, and is electrically connected with the logic processing module 3 and is in communication connection with the micro control module 2;

the watchdog unit 42 is communicatively connected to the power management unit 41 and the micro control module 2, and is configured to monitor a program flow of the micro control module 2, restart the micro control module 2 that failed and enters a dead loop.

The Power Management module 4 may be a system base chip (System Basis Chip, SBC), a Power Management chip (PMIC), or a peripheral independent Power Management unit 41 and an independent watchdog unit 42 (Watch Dog) may be configured separately. The following embodiments are described with respect to the integrated power management module 4, and the individual split module control principles are similar and are not described in the embodiments.

In an alternative embodiment of the present invention, the power management unit 41 may perform buck conversion on the voltage of the automobile battery, for example, 14V, to obtain working voltages with various specifications, such as 1.25V, 1.3V, 3.3V, 5V, etc., to supply power to various electronic components in the micro control module 2, the logic processing module 3, and the driving module 5, and monitor the working voltages.

In an alternative embodiment of the present invention, the power management module 4 and the micro control module 2 are configured with a communication interface for signal interaction between the modules, including transmitting status information of the micro control module 2, transmitting fault information, and recording the fault information; the power management module 4 is configured with a Reset interface, monitors the micro control module 2 through the watchdog unit 42 from time to time, and resets the micro control module 2 through the watchdog unit 42 when a program pointer is erroneously trapped into a dead loop due to data confusion of registers and memories of the micro control module 2, and erases a cold state fault.

In detail, in addition to the communication connection, the power management module 4 is electrically connected to the micro control module 2 to transmit the electric signal and the analog signal, and is provided with an output port and an input port, and the power management module 4 outputs the analog signal and the operating voltage to the micro control module 2.

In detail, the micro control module 2 is an integrated control chip including a logic self-checking function, a flash memory function, a clock (OSC) function, and the like, and may be a micro control unit (Microcontroller Unit, MCU) or a single chip microcomputer (Single Chip Microcomputer, SCM).

In detail, the micro control module 2 is further in communication connection with an upper computer (not shown in the figure), the upper computer sends a driving control instruction to the micro control module 2, the micro control module 2 is further in communication connection with a detection module (not shown in the figure) with the micro control module 2, the detection module sends a detection feedback signal to the micro control module 2, and after receiving the driving control instruction and the detection feedback signal, the micro control module 2 regulates and controls states (high level or low level) of the first pulse width modulation signal, the first enable signal, the first high-side safety signal and the first low-side safety signal according to the driving control instruction or the detection feedback signal.

In detail, the micro-control module 2 is also in communication connection (not shown in the figure) with the driving module 5, the driving module 5 has a fault self-checking function, and the driving module 5 detects own faults and feeds back to the micro-control module 2 during power-up and operation.

In detail, the power management module 4 is further communicatively connected to a detection module (not shown in the figure), the detection module sends a detection feedback signal to the power management module 4, the power management module 4 is further communicatively connected to the micro control module 2, the power management module 4 receives the feedback signal of the micro control module 2, the power management module 4 regulates and controls the state (high level or low level) of the power management signal according to the detection feedback signal and the feedback signal, and the logic processing module 3 is combined to perform logic processing on the first pulse width modulation signal, the first enable signal, the first high-side safety signal, the first low-side safety signal and the power management signal to obtain a second pulse width modulation signal, a second enable signal, a second high-side safety signal and a second low-side safety signal, so that the driving module 5 enters the pulse width modulation state or the safety state through comprehensive control of the second pulse width modulation signal, the second enable signal, the second high-side safety signal and the second low-side safety signal.

In more detail, as shown in fig. 1, the output end of the logic processing module 3 transmits a second pulse width modulation signal to the driving module 5, so that the driving module 5 enters a pulse width modulation state; the output end of the logic processing module 3 transmits a second high-side safety signal and a second low-side safety signal to the driving module 5, so that the driving module 5 enters a preset safety state.

As shown in fig. 1 and 2, in some embodiments, the logic processing module 3 includes a first logic processing unit 31, and the first logic processing unit 31 performs an and operation on the first pulse width modulation signal and the first enable signal to obtain and output a second pulse width modulation signal to the driving module 5.

As shown in fig. 2, in the present embodiment, the first logic processing unit 31 is used as a logic circuit control unit of a normal path, the first logic processing unit 31 performs an and operation on the first pwm signal and the first enable signal, and only when the first enable signal is at a high level, the first logic processing unit 31 can output the second pwm signal to control the normal control operation of the driving chip in the driving module 5. The first logic processing unit 31 includes a two-input logic and gate U1, where the logic and gate U1 inputs a first enable signal and a first pulse width modulation signal, and outputs a second pulse width modulation signal.

As shown in fig. 1 and 3, in some embodiments, the logic processing module 3 includes a second logic processing unit 32, and the second logic processing unit 32 performs an and operation on the first high-side safety signal and the power management signal by the second logic processing unit 32, so as to obtain and output a second high-side safety signal to the driving module 5; the second logic processing unit 32 performs an and operation on the wheel speed signal, the first low-side safety signal, and the power management signal, and outputs a second low-side safety signal to the driving module 5.

As shown in fig. 1 and 3, the second logic processing unit 32 is used as a logic circuit control unit of the standby path, at this time, the power management signal is at a low level, and the second logic processing unit 32 performs an and operation on the first high-side safety signal and the power management signal, so as to obtain and output a second high-side safety signal to the driving module 5; the second logic processing unit 32 performs an and operation on the wheel speed signal, the first low-side safety signal, and the power management signal, and outputs a second low-side safety signal to the driving module 5. Outputting a second low-side safety signal and a second high-side safety signal to the driving module 5, and controlling the driving chip to enter a preset safety state; the second high-side safety signal and the second low-side safety signal are used for driving a driving chip in the driving module 5 to control a driving circuit to enter a safety state of an upper bridge arm or a lower bridge arm.

The driving module 5 is in a freewheeling mode when the second high-side safety signal and the second low-side safety signal are both in a low level, that is, the driving module 5 controls the driving circuit to enter a safety state that both the upper bridge arm and the lower bridge arm are disconnected; the driving module 5 is in an active short circuit mode when the second high-side safety signal or the second low-side safety signal is at a low level, that is, the driving module 5 controls the driving circuit to enter a safety state that the upper bridge arm is disconnected or the lower bridge arm is disconnected.

Optionally, an additional logic circuit unit may be configured, where the logic circuit unit is composed of an and gate, and is consistent with the input signal received by the second logic processing unit 32, and outputs a second low-side safety signal, so as to avoid signal collision, and a logic not gate may be configured to achieve the same effect.

As shown in fig. 3, in some embodiments, the second logic processing unit 32 includes a two-input logic and gate U2 and a three-input logic and gate U3, and the logic and gate U2 inputs the first high-side safety signal and the power management signal, and outputs a second high-side safety signal; the logic AND gate U3 inputs the wheel speed signal, the first low-side safety signal and the power management signal, and outputs a second low-side safety signal.

As shown in fig. 1, the driving module 5 includes at least one driving chip, which is electrically connected to the logic processing module 3 and the power module (not shown in the figure), respectively, and performs driving control on the power module under the control of the output signal of the logic processing module 32. The number of the driving chips of the driving module 5 can be configured according to actual needs, and can be 1 or n, wherein n is an integer greater than or equal to 2.

As shown in fig. 1, in some embodiments, the vehicle control module 1 is electrically connected to the logic processing module 3 via a low voltage connector 6. The low-voltage plug-in connection 6 is provided as an external connection unit between the vehicle control module 1 and the motor controller for signal reception and transmission between the vehicle control module 1 and the motor controller. The low-voltage plug-in connector 6 is connected in communication with the vehicle control module 1 and the logic processing module 3, respectively.

Based on the design concept of the motor control system, as shown in fig. 5, in another exemplary embodiment of the present invention, a motor control method is provided, and the motor control method is applied to the motor control system according to any one of the foregoing embodiments, and the method includes the steps of:

s1, a motor control system drives a driving module to enter a pulse width modulation state or a safety state through a logic processing module based on micro control signals and power management signal states;

s2, when the motor control system is in a safe state, if the wheel speed signal generated by the vehicle control module is a high wheel speed signal, driving the driving module to enter an active short circuit mode through the logic processing module; and if the wheel speed signal generated by the vehicle control module is a low wheel speed signal, driving the driving module to enter a freewheeling mode through the logic processing module.

In step S2, the wheel speed signal is generated as a high wheel speed signal when the vehicle control module monitors that the wheel speed of the vehicle is equal to or greater than the preset wheel speed, and the wheel speed signal is generated as a low wheel speed signal when the vehicle control module monitors that the wheel speed of the vehicle is less than the preset wheel speed. The preset wheel speed is the wheel speed corresponding to the motor when the motor outputs the same torque in the active short circuit mode and the freewheeling mode.

Based on the design concept of the motor control system, in another exemplary embodiment of the present invention, an electronic device is provided, and the power module controller drives and controls the power module; the power module controller is the motor control system according to any one of the above embodiments, or performs safe driving control on the power module by using the motor control method according to any one of the above embodiments.

Based on the design concept of the motor control system described above, in another exemplary embodiment of the present invention, a vehicle in which the electronic apparatus described in any one of the embodiments described above is provided.

According to the motor control system provided by the invention, based on a simple logic circuit structural design, the wheel speed signal monitored by the vehicle control module is integrated into the motor control system, so that the motor control system can still judge to enter the most proper safety state based on the input wheel speed signal under the condition that a chip fails, the reverse torque generated by the motor under the safety state is ensured to be always maintained at a lower level, the whole vehicle and the safety new energy of the vehicle are considered, the safety and the reliability of the product of the motor control system are improved, and the safe power output under the condition that the four-wheel-drive new energy vehicle fails is ensured.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.

Claims

1. A motor control system, comprising:

a micro control module outputting a micro control signal;

the vehicle control module is used for monitoring the wheel speed of the vehicle and generating a wheel speed signal based on the wheel speed of the vehicle; the wheel speed signal is a high wheel speed signal when the wheel speed of the vehicle is larger than or equal to a preset wheel speed, and is a low wheel speed signal when the wheel speed of the vehicle is smaller than the preset wheel speed;

the logic processing module is electrically connected with the micro control module and the vehicle control module;

the driving module is electrically connected with the logic processing module and is used for driving the power module;

the power management module is electrically connected with the micro control module, the logic processing module and the driving module and outputs a power management signal to the logic processing module;

wherein the motor control system is configured to drive the driving module into a pulse width modulation state or a safety state according to the micro control signal, the wheel speed signal and the power management signal state;

in the safe state, the logic processing module is configured to drive the driving module into an active short circuit mode when the wheel speed signal is a high wheel speed signal, and drive the driving module into a freewheeling mode when the wheel speed signal is a low wheel speed signal.

2. The motor control of claim 1, wherein the preset wheel speed is a wheel speed corresponding to when the motor outputs the same torque in the active short circuit mode and the freewheeling mode.

3. The motor control system of claim 1, wherein the micro control signals output by the micro control module include a first pulse width modulation signal, a first enable signal, a first high-side safety signal, and a first low-side safety signal, and the logic processing module receives the first pulse width modulation signal, the first enable signal, the first high-side safety signal, the first low-side safety signal, the wheel speed signal, and the power management signal and performs logic processing to obtain and output a second pulse width modulation signal, a second high-side safety signal, and a second low-side safety signal to the driving module, so that the driving module enters a pulse width modulation state or a safety state.

4. The motor control system according to claim 3, wherein the micro control module receives a driving control command of the host computer and a detection feedback signal of the detection module, regulates states of the first pulse width modulation signal, the first enable signal, the first high-side safety signal and the first low-side safety signal according to the driving control command or the detection feedback signal, and the power management module receives the detection feedback signal of the detection module and the feedback signal of the micro control module, regulates states of the power management signal according to the detection feedback signal and the feedback signal, combines logic processing of the logic processing module, and enables the driving module to enter a pulse width modulation state or a safety state.

5. The motor control system of claim 3 wherein the logic processing module comprises a first logic processing unit that performs an and operation on the first pulse width modulated signal and a first enable signal to obtain and output the second pulse width modulated signal to the drive module.

6. The motor control system of claim 3 wherein the logic processing module comprises a second logic processing unit that performs an and operation on the first high-side safety signal and the power management signal to obtain and output a second high-side safety signal to the drive module; and the second logic processing unit performs AND operation on the wheel speed signal, the first low-side safety signal and the power management signal to obtain and output a second low-side safety signal to the driving module.

7. The motor control system of claim 6 wherein the drive module is in freewheeling mode when the second high-side safety signal and the second low-side safety signal are both low, and wherein the drive module is in active short-circuit mode when the second high-side safety signal or the second low-side safety signal is low.

8. The motor control system of claim 6 wherein the second logic processing unit comprises a two-input logic and gate and a three-input logic and gate, the logic and gate inputting the first high-side safety signal and the power management signal and outputting a second high-side safety signal; the logic AND gate inputs the wheel speed signal, the first low-side safety signal and the power management signal, and outputs a second low-side safety signal.

9. The motor control system of claim 1 wherein the vehicle control module is electrically connected to the logic processing module by a low voltage plug.

10. A motor control method, characterized by being applied to the motor control system according to any one of claims 1 to 9, the method comprising:

11. An electronic device is characterized by comprising a power module and a power module controller, wherein the power module controller drives and controls the power module; wherein the power module controller is the motor control system according to any one of claims 1 to 9, or the motor control method according to claim 10 is used for performing safe driving control on the power module.

12. A vehicle, characterized in that the electronic device of claim 11 is provided in the vehicle.