CN118572959A - Motor control system and vehicle - Google Patents

Abstract

The application relates to the technical field of motor control, in particular to a motor control system and a vehicle. The motor control system comprises a driving module, a low-voltage side logic circuit arranged on the low-voltage side of the driving module and a high-voltage side logic circuit arranged on the high-voltage side of the driving module, wherein the low-voltage side logic circuit is configured to generate a mode control signal based on the operation state of the motor control system, the driving module is configured to enter a corresponding working mode according to the mode control signal, the working mode comprises a low-voltage side active short-circuit inhibition mode and the driving module outputs a first enabling signal on the high-voltage side in the low-voltage side active short-circuit inhibition mode, and the high-voltage side logic circuit is configured to output a safety control signal to the driving module based on the real-time rotating speed of the motor in response to receiving the first enabling signal so as to control the motor in the corresponding safety state.

Description

Motor control system and vehicle

Technical Field

The application relates to the technical field of motor control, in particular to a motor control system and a vehicle.

Background

In a motor control system of an Electric Vehicle (EV) or a plug-in hybrid electric vehicle (PHEV), a power module having a power semiconductor is required to convert high-voltage direct current in a power battery into three-phase alternating current or three-phase alternating current into high-voltage direct current to realize four-quadrant control of a motor. In general, control of a power semiconductor requires a drive module (e.g., a gate driver) with isolation and amplification functions to pass a low-side signal (e.g., a Pulse Width Modulation (PWM) signal issued by a microprocessor MCU) to a high-side and to increase its voltage and load capacity.

In the prior art, a microprocessor MCU of a motor control system, a logic circuit, a low voltage side of a driving module, etc. are all powered by a low voltage battery, and a high voltage side of the driving module is powered by the low voltage battery via a voltage converter. The motor control system of the electric vehicle needs to be in accordance with functional safety as an electronic and electric component, and can control the motor in a safe state once a failure occurs. At present, two common safety states exist, one is ASC (Active short circuit) safety control states, and a motor winding is short-circuited by using a power semiconductor in a motor control system; the other is SPO (Safety pulse off) safe state, all power semiconductors in the motor control system are turned off to open the motor windings. Generally, a safe path on the low-voltage side or the high-voltage side is realized according to the design requirement of the system safety so as to realize an ASC safe state or an SPO safe state under a specific working condition, and an independent isolator is often required to be added to transmit signals before the high-voltage side and the low-voltage side, so that the system cost is high.

Disclosure of Invention

To solve or at least alleviate one or more of the above problems, the following solutions are provided. The embodiment of the application provides a motor control system and a vehicle, which can realize flexible control of a motor under multiple working conditions and simultaneously reduce the use of an independent isolator.

According to a first aspect of the present application, there is provided a motor control system comprising a drive module, a low-voltage side logic circuit arranged on the low-voltage side of the drive module, and a high-voltage side logic circuit arranged on the high-voltage side of the drive module, wherein the low-voltage side logic circuit is configured to generate a mode control signal based on an operational state of the motor control system; the driving module is configured to enter a corresponding working mode according to the mode control signal, wherein the working mode comprises a low-voltage side active short-circuit inhibition mode, and the driving module outputs a first enabling signal on a high-voltage side in the low-voltage side active short-circuit inhibition mode; and the high-voltage side logic circuit is used for outputting a safety control signal to the driving module based on the real-time rotating speed of the motor in response to receiving the first enabling signal so as to control the motor in a corresponding safety state.

Alternatively or additionally to the above, in a system according to an embodiment of the invention, the drive module comprises upper and lower leg drive circuits, and the high side logic circuit is connected to only one of the upper and lower leg drive circuits.

Alternatively or additionally to the above, the motor control system according to an embodiment of the present invention further includes: the low-voltage power supply is arranged on the low-voltage side of the driving module, and the low-voltage power supply is supplied to the driving module through a first input end of the high-voltage side of the driving module after isolation and conversion; and a high voltage power supply disposed on a high voltage side of the driving module, the high voltage power supply supplying power to the driving module via the first input terminal when the low voltage power supply fails.

Alternatively or additionally to the above, in the system according to an embodiment of the present invention, the low-voltage side logic circuit is configured to output a first mode control signal to the upper arm drive circuit or the lower arm drive circuit connected to the high-voltage side logic circuit to enter the low-voltage side active short-circuit inhibition mode when a software-hardware failure occurs on a low-voltage side of the motor control system; and outputting a second mode control signal to the upper bridge arm driving circuit or the lower bridge arm driving circuit which is not connected to the high-voltage side logic circuit so as to enter a pulse width modulation prohibition mode.

Alternatively or additionally to the above, in a system according to an embodiment of the present invention, the low-side logic circuit is configured to output a third mode control signal to the upper leg driving circuit or the lower leg driving circuit not connected to the high-side logic circuit to enter a low-side active short enable mode while outputting a second mode control signal to the upper leg driving circuit or the lower leg driving circuit connected to the high-side logic circuit to enter a pulse width modulation disable mode.

Alternatively or additionally to the above, in a system according to an embodiment of the present invention, in the pulse width modulation disabled mode, the upper leg driving circuit or the lower leg driving circuit turns off the corresponding leg; and in the low-voltage side active short-circuit enabling mode, the upper bridge arm driving circuit or the lower bridge arm driving circuit short-circuits the corresponding bridge arms.

Alternatively or additionally to the above, in a system according to an embodiment of the present invention, the low-side logic circuit is configured to output a second mode control signal to the upper leg driving circuit or the lower leg driving circuit not connected to the high-side logic circuit to enter a pulse width modulation disabled mode while outputting a third mode control signal to the upper leg driving circuit or the lower leg driving circuit connected to the high-side logic circuit to enter a low-side active short enable mode.

Alternatively or additionally, in a system according to an embodiment of the invention, the low side logic circuit is configured to output a fourth mode control signal to the upper and lower leg drive circuits to enter a pulse width modulation enable mode when the motor control system is operating normally.

Alternatively or additionally, in a system according to an embodiment of the present invention, in the pulse width modulation enable mode, the upper and lower leg driving circuits output power driving signals to the respective legs according to pulse width modulation signals.

Alternatively or additionally to the above, in a system according to an embodiment of the invention, the high side logic circuit is configured to: and receiving the rotating speed information acquired by the motor rotating speed detection unit, and outputting the safety control signal to a second input end of the high-voltage side of the upper bridge arm driving circuit or the lower bridge arm driving circuit connected with the high-voltage side logic circuit according to the rotating speed information.

Alternatively or additionally to the above, in a system according to an embodiment of the invention, the upper leg drive circuit or the lower leg drive circuit is configured to: when the rotating speed information indicates that the real-time rotating speed of the motor is greater than or equal to a first rotating speed threshold value, responding to the safety control signal, and controlling the motor to enter an ASC safety state; and under the condition that the rotating speed information indicates that the real-time rotating speed of the motor is smaller than a first rotating speed threshold value, responding to the safety control signal, and controlling the motor to enter an SPO safety state.

According to a second aspect of the present application, there is provided a vehicle comprising any one of the motor control systems according to the first aspect of the present application.

According to the motor control scheme of one or more embodiments of the application, an enabling function and a signal input function for a high-voltage side logic circuit are added for a driving module, and the driving module can correspondingly control a motor according to the running state of a motor control system and the real-time rotating speed of the motor through the combined use of the high-voltage side logic circuit and the low-voltage side logic circuit, so that flexible control of the motor under all working conditions is realized. In addition, the motor control system according to one or more embodiments of the present application can independently switch the safety state according to the real-time rotational speed of the motor, independent of external devices, thereby avoiding the use of an additional isolator, saving hardware costs and reducing system complexity.

Drawings

The above and other objects and advantages of the present application will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, in which identical or similar elements are designated by the same reference numerals.

FIG. 1 illustrates a schematic block diagram of a motor control system 10 in accordance with one or more embodiments of the application; and

Fig. 2 shows a schematic diagram of a motor control system 20 in accordance with one or more embodiments of the application.

Detailed Description

The following description of the specific embodiments is merely exemplary in nature and is in no way intended to limit the disclosed technology or the application and uses of the disclosed technology. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, or the following detailed description.

Terms such as "comprising" and "including" mean that in addition to having elements and steps that are directly and explicitly recited in the description, the inventive aspects also do not exclude the presence of other elements and steps not directly or explicitly recited. The terms such as "first" and "second" do not denote the order of units in terms of time, space, size, etc. but rather are merely used to distinguish one unit from another. It is to be understood that the techniques of this disclosure are generally applicable to electric vehicles, including, but not limited to, electric-only vehicles (BEV), hybrid Electric Vehicles (HEV), fuel cell vehicles (FCEV), and the like.

Hereinafter, various exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings.

Referring now to fig. 1, fig. 1 illustrates a schematic block diagram of a motor control system 10 in accordance with one or more embodiments of the present application. As shown in fig. 1, the motor control system 10 includes a low side logic circuit 110, a drive module 120, and a high side logic circuit 130.

Optionally, the motor control system 10 further comprises a low voltage power supply arranged on the low voltage side of the drive module and a high voltage power supply arranged on the high voltage side of the drive module. The high-voltage power supply supplies power to the drive module via the first input terminal when the low-voltage power supply fails.

In the motor control system 10, the low-voltage side logic circuit 110 is disposed at the low-voltage side of the driving module 120, and is configured to generate a mode control signal based on the operation state of the motor control system 10 and transmit the mode control signal to the driving module 120, so that the driving module 120 enters a corresponding operation mode according to the mode control signal.

Illustratively, the operating state of the motor control system 10 refers to whether or not a software or hardware fault or an undervoltage fault has occurred in various components within the system, whether or not a power failure has occurred in the system, and the like. In one or more embodiments, motor control system 10 may also include one or more power supplies, a microprocessor MCU, and a power management System Base Chip (SBC). In such embodiments, the low side logic 110 is powered by one or more power sources and receives signals from the microprocessor MCU and the power management SBC indicative of the operating state of the motor control system 10, based on which the low side logic 110 generates mode control signals for the drive module 120. By way of example, the mode control signal generated by the low side logic circuit 110 may include one or more of the following: a first mode control signal to control the driving module 120 to enter a low side Active Short Circuit (ASC) disable mode; a second mode control signal to control the driving module 120 to enter a Pulse Width Modulation (PWM) disable mode; a third mode control signal to control the driving module 120 to enter a low side Active Short (ASC) enabled mode; and a fourth mode control signal to control the driving module 120 to enter a Pulse Width Modulation (PWM) enable mode.

The drive module 120 is configured to enter a respective operating mode (e.g., low side ASC disable mode, PWM disable mode, low side ASC enable mode, PWM enable mode) according to a mode control signal received from the low side logic circuit 110. The driving circuit 120 is connected to the power module to control on and off of the power semiconductors of the power module, and convert the high voltage dc power into ac power required by the motor. Optionally, the driving module 120 includes an upper bridge arm driving circuit 121 and a lower bridge arm driving circuit 122, where the upper bridge arm driving circuit 121 is used for controlling the on or off state of the power semiconductor in the upper bridge arm of the power module, and the lower bridge arm driving circuit 122 is used for controlling the on or off state of the power semiconductor in the lower bridge arm of the power module, and the upper bridge arm driving circuit 121 and the lower bridge arm driving circuit 122 cooperate to control the power module to convert high voltage into alternating current, so as to drive the motor to operate. In one example, upper leg driver circuit 121 and lower leg driver circuit 122 are connected to and receive the same mode control signal (e.g., fourth mode control signal) from low side logic circuit 110 and thus enter the same operational mode. In another example, upper leg driver circuit 121 and lower leg driver circuit 122 receive different mode control signals (e.g., first mode control signal and second mode control signal) from low side logic circuit 110 and thus enter different modes of operation. It should be noted that, according to practical application requirements, only the upper bridge arm driving circuit 121 or only the lower bridge arm driving circuit 122 is connected to the high voltage side logic circuit 130, if the upper bridge arm driving circuit 121 and the lower bridge arm driving circuit 122 are simultaneously connected to and controlled by the high voltage side logic circuit 130, the upper bridge arm and the lower bridge arm may be simultaneously turned on, so that the battery is short-circuited.

Optionally, in the event of a software and hardware failure on the low voltage side of the motor control system 10, including but not limited to: the microprocessor MCU may fail in software and hardware, power management SBC may fail in software and hardware, or low voltage power supply (e.g., power down), etc., the low side logic circuit 110 may output a first mode control signal to the upper leg drive circuit 121 or the lower leg drive circuit 122 connected to the high side logic circuit 130 to enter a low side ASC disable mode, and may output a second mode control signal to the upper leg drive circuit 121 or the lower leg drive circuit 122 not connected to the high side logic circuit 130 to enter a PWM disable mode. In one example, the low side logic circuit actually outputs the same level signal to the upper arm drive circuit 121 and the lower arm drive circuit 122; but for either upper leg driver circuit 121 or lower leg driver circuit 122 connected to high side logic circuit 130, the level signal represents the first mode control signal; for the upper arm drive circuit 121 or the lower arm drive circuit 122 to which the high side logic circuit 130 is not connected, the level signal represents the second mode control signal. In one example, low side logic circuit 110 outputs a first mode control signal to upper leg drive circuit 121 connected to high side logic circuit 130 to enter a low side ASC disable mode. In the low-side ASC disable mode, the upper arm drive circuit 121 outputs a first enable signal on the high-side for enabling the high-side logic circuit 130, at which time the high-side logic circuit 130 will output a safety control signal to the drive module 120 based on the motor real-time speed to control the motor in a corresponding safety state (e.g., active Short Circuit (ASC) safety state, safety Shutdown (SPO) safety state). In this example, the low-side logic circuit 110 outputs a second mode control signal to the lower arm drive circuit 122 that is not connected to the high-side logic circuit 130 to enter the PWM disable mode. In the PWM disable mode, the lower leg driver circuit 122 turns off the lower legs of the power modules, i.e., turns off all power semiconductors in the lower legs of the power modules. In the PWM disable mode, the output of the lower leg driver circuit 122 is independent of the Pulse Width Modulation (PWM) signal generated by the microprocessor MCU.

Alternatively, the low-voltage side logic circuit 110 is configured to output the second mode control signal to the upper arm drive circuit 121 or the lower arm drive circuit 122 connected to the high-voltage side logic circuit 130 to enter the PWM disable mode, while outputting the third mode control signal to the upper arm drive circuit 121 or the lower arm drive circuit 122 not connected to the high-voltage side logic circuit 130 to enter the low-voltage side ASC enable mode. In one example, low-side logic circuit 110 outputs a second mode control signal to upper leg drive circuit 121 connected to high-side logic circuit 130 to enter a PWM disable mode in which upper leg drive circuit 121 turns off the upper leg of the power module. In this example, the low-side logic circuit 110 outputs a third mode control signal to the lower leg drive circuit 122 that is not connected to the high-side logic circuit 130 to put it into the low-side ASC enable mode in which the lower leg drive circuit 122 shorts the lower leg of the power module, i.e., shorts all power semiconductors in the lower leg of the power module.

Alternatively, the low-side logic circuit 110 is configured to output the second mode control signal to the upper arm drive circuit 121 or the lower arm drive circuit 122 not connected to the high-side logic circuit 130 to enter the PWM prohibition mode while outputting the third mode control signal to the upper arm drive circuit 121 or the lower arm drive circuit 122 connected to the high-side logic circuit 130 to enter the low-side ASC enable mode. In one example, low side logic circuit 110 outputs a third mode control signal to upper leg drive circuit 121 connected to high side logic circuit 130 to enter a low side ASC enabled mode in which upper leg drive circuit 121 shorts the upper leg of the power module. In this example, low-side logic circuit 110 outputs a second mode control signal to lower leg drive circuit 122 that is not connected to high-side logic circuit 130 to enter a PWM disable mode in which lower leg drive circuit 122 turns off the lower leg of the power module.

Alternatively, the low-side logic circuit is configured to output the fourth mode control signal to the upper arm drive circuit 121 and the lower arm drive circuit 122 to bring both into the PWM enable mode when the motor control system 10 is operating normally. In the PWM enable mode, the upper arm driving circuit 121 and the lower arm driving circuit 122 output power driving signals to the corresponding arms of the power module according to the pulse width modulation signals generated by the microprocessor MCU, that is, at this time, the upper arm driving circuit 121 outputs power driving signals to the upper arm following the pulse width modulation signals, and the lower arm driving circuit 122 outputs power driving signals to the lower arm following the pulse width modulation signals.

The high-side logic circuit 130 is provided on the high-side of the driving module 120 and is connected to one of the upper arm driving circuit 121 and the lower arm driving circuit 122. The high-side logic circuit 130 is configured to output a safety control signal to the drive module 120 based on the motor real-time rotational speed in response to receiving the first enable signal from the upper arm drive circuit 121 or the lower arm drive circuit 122 connected thereto to control the motor in a corresponding safety state. As described above, when the low voltage side of the motor control system 10 fails, the low voltage side logic circuit 110 outputs the first mode control signal to the upper arm drive circuit 121 or the lower arm drive circuit 122 connected to the high voltage side logic circuit 130 to put it into the low voltage side ASC disable mode, and the upper arm drive circuit 121 or the lower arm drive circuit 122 in the low voltage side ASC disable mode outputs the first enable signal to the high voltage side logic circuit 130 to enable the high voltage side logic circuit 130. In one example, the high voltage power supply supplies power to the drive module via the first input when the low voltage power supply fails, and the high side safety logic circuit receives a first enable signal.

Alternatively, the high-side logic circuit 130 in the enabled state receives rotational speed information indicating the real-time rotational speed of the motor from the motor rotational speed detection unit, which rotational speed information may be generated based on phase current information of the motor drive module collected by the current sensor, or may be directly obtained by the speed sensor, for example. In the case where the rotational speed information indicates that the real-time rotational speed of the motor is greater than or equal to the first rotational speed threshold, the high-side logic circuit 130 outputs a safety control signal, for example, a high level, to the second input terminal of the high-side of the upper arm drive circuit 121 or the lower arm drive circuit 122 connected to the high-side logic circuit; in the case where the rotational speed information indicates that the real-time rotational speed of the motor is less than the first rotational speed threshold, the high-side logic circuit 130 outputs a safety control signal, such as a low level, to the second input.

Optionally, when upper leg drive circuit 121 or lower leg drive circuit 122 inputs a high level via the second input, it will control the motor to enter an ASC safe state; if the upper arm drive circuit 121 or the lower arm drive circuit 122 inputs a low level via the second input terminal, it will control the motor to enter the SPO safe state.

In the ASC safe state, the upper arm drive circuit 121 or the lower arm drive circuit 122 connected to the high side safety logic circuit 130 places the corresponding half-bridge (e.g., upper arm or lower arm) in the power module in a short circuit state, and the other half-bridge will be in an off state. In one example, if the upper arm driving circuit 121 connected to the high side logic circuit 130 inputs a high level via the second input terminal, the upper arm driving circuit 121 will control the upper arm in the power module to be in a short circuit state, and the lower arm driving circuit 122 is in the PWM disable mode. In the PWM disable mode, the lower leg driver circuit 122 turns off the lower leg of the power module.

In the SPO safe state, all the legs in the power module will be in the off state. In one example, if the upper arm driving circuit 121 connected to the high-side logic circuit 130 inputs a low level via the second input terminal, the upper arm driving circuit 121 will control the upper arm in the power module to be in an off state, and at this time, the lower arm driving circuit 122 will be in a PWM disable mode, in which the lower arm driving circuit 122 turns off the lower arm of the power module.

Through the combination of the logic circuits at the high voltage side and the low voltage side, the driving module 120 can correspondingly control the motor according to the running state of the motor control system 10 and the real-time rotating speed of the motor, so that the motor can be flexibly controlled under multiple working conditions. In addition, when the low-voltage side of the motor control system 10 fails, the motor control system 10 can still switch the safety state according to the real-time rotating speed of the motor, so that the use of an extra isolator is avoided, the hardware cost is saved, and the complexity of the system is reduced.

With continued reference to fig. 2, fig. 2 shows a schematic diagram of a motor control system 20 in accordance with one or more embodiments of the application. Other components that cooperate with motor control system 20 are also shown in fig. 2 for clarity of illustration of the principles of the present application.

As shown in fig. 2, motor control system 20 includes a low voltage power supply 201, a first voltage inverter 202, a high voltage power supply 203, a second voltage inverter 204, a power management SBC 205, a microprocessor MCU 206, a low side logic circuit 207, an upper leg drive circuit 208, a lower leg drive circuit 209, an upper leg 210, a lower leg 211, and a high side logic circuit 212.

The low-voltage power supply 201 supplies power to the microprocessor MCU 206, the low-voltage side logic circuit 207, the low-voltage side of the upper arm drive circuit 208, and the low-voltage side of the lower arm drive circuit 209 through the power management SBC 205, and the low-voltage power supply 201 is connected to the high-voltage side of the upper arm drive circuit 208 and the high-voltage side of the lower arm drive circuit 209 through the first voltage converter 202 and the diode D1. The high voltage power supply 203 is connected to the high voltage side of the upper arm drive circuit 208 and the high voltage side of the lower arm drive circuit 209 through a second voltage converter 204 and a diode D2. When the low voltage power supply 201 fails, the high voltage power supply 203 will turn on diode D2 and supply power to the high voltage side of the upper leg driver circuit 208 and the high voltage side of the lower leg driver circuit 209. With such a redundant power supply design, the upper arm drive circuit 208 and the lower arm drive circuit 209 can remain in normal operation in the event of a power failure, i.e., enter the low side ASC disable mode and the PWM disable mode, thereby improving the robustness of the system.

The low-side logic circuit 207 receives signals indicative of the operating state of the motor control system 10 from the power management SBC 205 and the microprocessor MCU 206 and generates mode control signals for the upper leg drive circuit 208 and the lower leg drive circuit 209, respectively. The upper arm drive circuit 208 and the lower arm drive circuit 209 enter respective operation modes (e.g., low-side ASC disable mode, PWM disable mode, low-side ASC enable mode, PWM enable mode) based on the mode control signals. As shown in fig. 2, upper leg driver circuit 208 is connected to high side logic circuit 212. It will be appreciated that in other embodiments, the lower leg driver circuit 209 may be connected to the high side logic circuit 212, as the application is not limited in this regard.

The high-side logic circuit 212 outputs a safety control signal to the upper arm drive circuit 208 based on the motor real-time rotational speed in response to receiving the first enable signal from the upper arm drive circuit 208 connected thereto to control the motor in a corresponding safety state. Specifically, when the motor control system 10 fails on the low side, the low side logic circuit 207 outputs a first mode control signal to the upper arm drive circuit 208 to put it into the low side ASC disable mode, and the upper arm drive circuit 208 outputs a first enable signal to enable the high side logic circuit 122. The high-voltage side logic circuit 122 in the enabled state receives the rotational speed information indicating the real-time rotational speed of the motor from the motor rotational speed detection unit, and outputs a high level to the upper arm drive circuit 208 if the rotational speed information indicates that the real-time rotational speed of the motor is greater than or equal to the first rotational speed threshold value, and outputs a low level to the upper arm drive circuit 208 if the rotational speed information indicates that the real-time rotational speed of the motor is less than the first rotational speed threshold value. The upper arm drive circuit 208 will control the motor to enter an ASC safe state when a high level is input and will control the motor to enter an SPO safe state when a low level is input.

The descriptions of the low-side logic circuit 207, the upper arm driving circuit 208, the lower arm driving circuit 209, and the high-side logic circuit 212 may be referred to the above specific descriptions of the low-side logic circuit 110, the upper arm driving circuit 121, the lower arm driving circuit 122, and the high-side logic circuit 130, respectively, and the related contents are hereby incorporated by reference for brevity and not repeated herein.

According to another aspect of the present application there is provided a vehicle comprising any one of the motor control systems as described above.

The embodiments and examples set forth herein are presented to best explain the embodiments consistent with the invention and its particular application and to thereby enable those skilled in the art to make and use the invention. Those skilled in the art will recognize that the foregoing description and examples have been presented for the purpose of illustration and example only. The description as set forth is not intended to cover various aspects of the invention or to limit the invention to the precise form disclosed.

Claims (12)

1. A motor control system is characterized by comprising a driving module, a low-voltage side logic circuit arranged on the low-voltage side of the driving module and a high-voltage side logic circuit arranged on the high-voltage side of the driving module, wherein,

The low side logic circuit is configured to generate a mode control signal based on an operational state of the motor control system;

the driving module is configured to enter a corresponding working mode according to the mode control signal, wherein the working mode comprises a low-voltage side active short-circuit inhibition mode, and the driving module outputs a first enabling signal on a high-voltage side in the low-voltage side active short-circuit inhibition mode; and

The high side logic circuit is configured to output a safety control signal to the drive module based on a motor real-time speed in response to receiving the first enable signal to control the motor in a corresponding safety state.

2. The system of claim 1, wherein the drive module includes upper and lower leg drive circuits and the high side logic circuit is connected to only one of the upper and lower leg drive circuits.

3. The system of claim 1, wherein the motor control system further comprises:

the low-voltage power supply is arranged on the low-voltage side of the driving module, and the low-voltage power supply is supplied to the driving module through a first input end of the high-voltage side of the driving module after isolation and conversion; and

And the high-voltage power supply is arranged on the high-voltage side of the driving module and supplies power to the driving module through the first input end when the low-voltage power supply fails.

4. The system of claim 2, wherein,

The low side logic circuit is configured to upon a software and hardware failure of the low side of the motor control system,

Outputting a first mode control signal to the upper bridge arm driving circuit or the lower bridge arm driving circuit connected to the high-voltage side logic circuit so as to enter the low-voltage side active short-circuit inhibition mode;

And outputting a second mode control signal to the upper bridge arm driving circuit or the lower bridge arm driving circuit which is not connected to the high-voltage side logic circuit so as to enter a pulse width modulation prohibition mode.

5. The system of claim 2, wherein the low side logic circuit is configured to output a third mode control signal to the upper leg drive circuit or the lower leg drive circuit not connected to the high side logic circuit to enter a low side active short enable mode while outputting a second mode control signal to the upper leg drive circuit or the lower leg drive circuit connected to the high side logic circuit to enter a pulse width modulation disable mode.

6. The system of claim 5, wherein in the pulse width modulation disabled mode, the upper leg drive circuit or the lower leg drive circuit turns off the respective leg; and in the low-voltage side active short-circuit enabling mode, the upper bridge arm driving circuit or the lower bridge arm driving circuit short-circuits the corresponding bridge arms.

7. The system of claim 2, wherein the low side logic circuit is configured to output a second mode control signal to the upper leg drive circuit or the lower leg drive circuit not connected to the high side logic circuit to enter a pulse width modulation disabled mode while outputting a third mode control signal to the upper leg drive circuit or the lower leg drive circuit connected to the high side logic circuit to enter a low side active short enable mode.

8. The system of claim 2, wherein the low side logic circuit is configured to output a fourth mode control signal to the upper and lower leg drive circuits to place both into a pulse width modulation enabled mode when the motor control system is operating normally.

9. The system of claim 8, wherein in the pulse width modulation enabled mode, the upper and lower leg drive circuits output power drive signals to respective legs according to pulse width modulation signals.

10. The system of claim 2, wherein the high-side logic circuit is configured to:

And receiving the rotating speed information acquired by the motor rotating speed detection unit in response to the first enabling signal, and outputting the safety control signal to a second input end of the high-voltage side of the upper bridge arm driving circuit or the lower bridge arm driving circuit connected with the high-voltage side logic circuit according to the rotating speed information.

11. The system of claim 10, wherein the upper leg drive circuit or the lower leg drive circuit is configured to:

When the rotating speed information indicates that the real-time rotating speed of the motor is greater than or equal to a first rotating speed threshold value, responding to the safety control signal, and controlling the motor to enter an ASC safety state; and

And under the condition that the rotating speed information indicates that the real-time rotating speed of the motor is smaller than a first rotating speed threshold value, responding to the safety control signal, and controlling the motor to enter an SPO safety state.

12. A vehicle comprising the motor control system according to any one of claims 1 to 11.