阅读说明：本技术 一种电动汽车驱动电机控制模式转换方法 (Method for converting control modes of driving motor of electric automobile ) 是由 赵贝贝 刘昭才 张虎 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种电动汽车驱动电机控制模式转换方法,包括：从复位到PWM关闭的转换A、PWM关闭与零转矩模式的转换B、零转矩模式与正向驱动模式的转换C、零转矩模式与反向驱动模式的转换D、零转矩模式与再生制动模式的转换E、零转矩模式与速度模式的转换F、电机控制器进入或退出故障模式的转换G、故障模式进入PWM关闭的转换H、电机控制器进入休眠状态的转换I、驱动或制动状态进入PWM关闭状态的转换J、禁止模式切换的转换K。采用上述技术方案,实现对新能源电动汽车驱动电机控制器模式切换,使得新能源电动车控制处理更加细腻平顺,提高车辆行驶的平稳性、乘坐的舒适性和操控的稳定性。(The invention discloses a method for converting control modes of a driving motor of an electric automobile, which comprises the following steps: transition A, PWM from reset to PWM off transitions B off with zero torque mode, C zero torque mode with forward drive mode, D zero torque mode with reverse drive mode, E zero torque mode with regenerative braking mode, F zero torque mode with speed mode, G motor controller transitions into or out of fault mode, H fault mode transitions into PWM off, I motor controller transitions into sleep state, J drive or brake state transitions into PWM off state, K transition to inhibit mode switching. By adopting the technical scheme, the mode switching of the new energy electric automobile driving motor controller is realized, so that the new energy electric automobile is more fine and smooth in control treatment, and the running stability, riding comfort and control stability of the automobile are improved.)

1. A method for converting control modes of a driving motor of an electric automobile is disclosed, wherein the electric automobile is provided with a whole automobile controller and a motor controller; electric automobile driving motor control mode include speed mode, forward drive mode, reverse drive mode, regenerative braking mode, zero torque mode and failure mode, its characterized in that: the control mode conversion method comprises the following steps: transition A, PWM from reset to PWM off transitions B off with zero torque mode, C zero torque mode with forward drive mode, D zero torque mode with reverse drive mode, E zero torque mode with regenerative braking mode, F zero torque mode with speed mode, G motor controller transitions into or out of fault mode, H fault mode transitions into PWM off, I motor controller transitions into sleep state, J drive or brake state transitions into PWM off state, K transition to inhibit mode switching.

2. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion A is as follows: the whole vehicle is powered on at low voltage according to a normal flow, the motor controller is powered on at low voltage and is awakened, a self-checking program of the motor controller is free of any abnormality, and initialization is completed.

3. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion B is as follows: the low voltage self-check is correct, the condition that the high voltage self-check on the motor controller has no shutdown fault is the condition that the PWM is switched to the zero torque mode after the high voltage on the whole vehicle is closed; otherwise, the motor controller has high voltage or shutdown fault.

4. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion C is as follows: after the high voltage on the vehicle is not abnormal, the vehicle control unit enables the motor controller (motor is enabled), and when the vehicle control unit requests the motor controller to enter or exit a forward driving mode from a zero-torque mode, the motor controller responds and enters a corresponding mode.

5. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion D is as follows: the vehicle control unit enables the motor controller; when the vehicle control unit requests the motor controller to enter or exit the reverse driving mode from the zero-torque mode, the motor controller enters a corresponding mode.

6. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion E is as follows: the vehicle control unit enables the motor controller; when the vehicle control unit requests the motor controller to enter or exit the regenerative braking mode from the zero-torque mode, the motor controller enters a corresponding mode.

7. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion F is: the vehicle control unit enables the motor controller; when the vehicle control unit requests the motor controller to enter or exit a speed mode from a zero-torque mode, the motor controller enters a corresponding mode.

8. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion G is as follows: and when the motor controller has a fault, the current state is fed back through the message, and the vehicle control unit requests the motor controller to enter or exit a fault mode.

9. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion H is as follows: when the motor controller has a shutdown fault, the motor controller enters a PWM closing mode from a fault mode; or when the motor controller is in the PWM closing mode and the low voltage detection fails, the motor controller enters the failure mode.

10. The method for switching the control mode of the driving motor of the electric vehicle according to claim 1, wherein: the conversion I is as follows: when the vehicle control unit performs power-off control on the motor controller, the motor controller enters a dormant state after high voltage is applied.

Technical Field

The invention belongs to the technical field of new energy automobiles, and relates to a power system technology thereof. More particularly, the invention relates to a method for switching control modes of a driving motor of an electric automobile.

Background

Through years of development of new energy electric automobile technology, the following types are formed: pure electric vehicles, hybrid vehicles, plug-in hybrid vehicles, and the like. Among them, EV (pure electric vehicle) is currently the main force pushing direction.

The requirements for comfort and operation stability of the pure electric automobile customer market are more strict, and the requirements for stability of the pure electric automobile customer market are also indispensable. Along with the implementation of the state policy on new energy electric vehicles, the market is rapidly expanded, the competition on new energy pure electric vehicles is more intense, and the selection requirements of customers on new energy vehicles are higher.

Disclosure of Invention

The invention provides a method for converting a control mode of a driving motor of an electric vehicle, and aims to control and process a new energy electric vehicle more finely and smoothly.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention relates to a method for converting control modes of a driving motor of an electric automobile, wherein the electric automobile is provided with a whole automobile controller and a motor controller; the control mode of the driving motor of the electric automobile comprises a running speed mode, a forward driving mode, a reverse driving mode, a regenerative braking mode, a zero torque mode and a fault mode; the control mode conversion method comprises the following steps: transition A, PWM from reset to PWM off transitions B off with zero torque mode, C zero torque mode with forward drive mode, D zero torque mode with reverse drive mode, E zero torque mode with regenerative braking mode, F zero torque mode with speed mode, G motor controller transitions into or out of fault mode, H fault mode transitions into PWM off, I motor controller transitions into sleep state, J drive or brake state transitions into PWM off state, K transition to inhibit mode switching.

The conversion A is as follows: the whole vehicle is powered on at low voltage according to a normal flow, the motor controller is powered on at low voltage and is awakened, a self-checking program of the motor controller is free of any abnormality, and initialization is completed;

the conversion B is as follows: the low voltage self-check is correct, the condition that the high voltage self-check on the motor controller has no shutdown fault is the condition that the PWM is switched to the zero torque mode after the high voltage on the whole vehicle is closed; otherwise, the motor controller is under high voltage or has shutdown fault;

the conversion C is as follows: after the high voltage on the vehicle is not abnormal, the vehicle control unit enables the motor controller (motor is enabled), and when the vehicle control unit requests the motor controller to enter or exit a forward driving mode from a zero-torque mode, the motor controller responds and enters a corresponding mode.

The conversion D is as follows: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit the reverse driving mode from the zero-torque mode, the motor controller enters a corresponding mode.

The conversion E is as follows: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit the regenerative braking mode from the zero-torque mode, the motor controller enters a corresponding mode.

The conversion F is: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit a speed mode from a zero-torque mode, the motor controller enters a corresponding mode.

The conversion G is as follows: and when the motor controller has a fault, the current state is fed back through the message, and the vehicle control unit requests the motor controller to enter or exit a fault mode.

The conversion H is as follows: when the motor controller has a shutdown fault, the motor controller enters a PWM Off mode from a fault mode; or when the motor controller is in the PWM closing mode and the low voltage detection fails, the motor controller enters the failure mode.

The conversion I is as follows: when the vehicle control unit performs power-off control on the motor controller, the motor controller enters a dormant state after high voltage is applied.

The conversion J is as follows: when the motor works under the driving or braking working condition and has a shutdown fault or high-voltage interruption, switching is carried out, and the controller enters a PWM (pulse width modulation) closing state from the driving or braking state.

The switching K comprises the following switching of forbidden modes: a forward drive mode and a reverse drive mode; a reverse drive mode and a regenerative drive mode; a forward drive mode and a regenerative drive mode; PWM off to drive or brake state; driving or braking state to speed mode; the PWM is turned off to speed mode.

By adopting the technical scheme, the mode switching of the drive motor controller of the new energy electric vehicle is realized, so that the control processing of the new energy electric vehicle is finer and smoother, and the running stability, riding comfort and control stability of the vehicle are improved.

Drawings

FIG. 1 is a diagram illustrating control mode switching according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.

As shown in fig. 1, the schematic diagram of the control mode conversion of the present invention is that the electric vehicle related to the present invention is provided with a vehicle control unit and a motor controller; the electric automobile driving motor control mode comprises a running speed mode, a forward driving mode, a reverse driving mode, a regenerative braking mode, a zero torque mode and a fault mode.

The invention controls the electric drive system of the new energy electric automobile and can switch various modes of the drive motor controller of the new energy electric automobile. Therefore, the control treatment of the new energy electric vehicle is more exquisite and smooth, the requirements of most consumers in the market are met, and the following control mode of the driving motor is generated.

In order to overcome the defects of the prior art and achieve the aim of finer and smoother control treatment of the new energy electric vehicle, the invention adopts the following technical scheme:

the method for converting the control modes of the driving motor of the electric automobile comprises the following steps: transition A, PWM from reset to PWM off transitions B off with zero torque mode, C zero torque mode with forward drive mode, D zero torque mode with reverse drive mode, E zero torque mode with regenerative braking mode, F zero torque mode with speed mode, G motor controller transitions into or out of fault mode, H fault mode transitions into PWM off, I motor controller transitions into sleep state, J drive or brake state transitions into PWM off state, K transition to inhibit mode switching.

By adopting the technical scheme, the switching of different modes of the driving motor such as a forward driving mode, a reverse driving mode, regenerative braking and the like is realized by utilizing the information interaction between the driving motor controller and the vehicle controller at different stages, and the mode switching is also subjected to effective logic processing and judgment. Meanwhile, in the switching process, the control processing of the new energy electric vehicle is more exquisite and smooth, and the running stability and safety of the vehicle, riding comfort and control stability are improved.

Aiming at the situation that the control mode of the front driving motor is mainly a forward driving mode, a reverse driving mode, a regenerative braking mode and the like, and the mode switching is effectively logically processed and judged for smoothness and safety in the switching of various modes, the method comprises the following specific contents:

the conversion A is as follows: the whole vehicle is powered on at low voltage according to a normal flow, the motor controller is powered on at low voltage and is awakened, a self-checking program of the motor controller is free of any abnormality, and initialization is completed;

the conversion B is as follows: the low voltage self-check is correct, the condition that the high voltage self-check on the motor controller has no shutdown fault when the whole vehicle is in high voltage and the PWM is switched to a zero torque mode; otherwise, the motor controller is under high voltage or has shutdown fault;

the conversion C is as follows: after the high voltage on the whole vehicle is not abnormal, the whole vehicle controller enables a motor controller (motor enable); when the vehicle control unit requests the motor controller to enter or exit the forward driving mode from the zero-torque mode, the motor controller responds and follows to enter the corresponding mode.

The conversion D is as follows: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit the reverse driving mode from the zero-torque mode, the motor controller enters a corresponding mode.

The conversion E is as follows: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit the regenerative braking mode from the zero-torque mode, the motor controller enters a corresponding mode.

The conversion F is: enabling a motor controller (motor enable) by the vehicle control unit; when the vehicle control unit requests the motor controller to enter or exit a speed mode from a zero-torque mode, the motor controller enters a corresponding mode.

The conversion G is as follows: and when the motor controller has a fault, the current state is fed back through the message, and the vehicle control unit requests the motor controller to enter or exit a fault mode.

The conversion H is as follows: when the motor controller has a shutdown fault, the motor controller enters a PWM Off mode from a fault mode; or when the motor controller is in the PWM closing mode and the low voltage detection fails, the motor controller enters the failure mode.

The conversion I is as follows: when the vehicle control unit performs power-off control on the motor controller, the motor controller enters a dormant state after high voltage is applied.

The conversion J is as follows: the motor works under the driving or braking working condition; when a shutdown fault or high voltage is cut off, switching is carried out, and the motor controller enters a PWM closing state from a driving or braking state.

The switching K comprises the following switching of forbidden modes: a forward drive mode and a reverse drive mode; a reverse drive mode and a regenerative drive mode; a forward drive mode and a regenerative drive mode; PWM off to drive or brake state; driving or braking state to speed mode; the PWM is turned off to speed mode.

The invention combines the whole vehicle power-on and power-off process, so that the driver can execute corresponding operation under different operation commands, thereby not only improving the safety performance of the vehicle; meanwhile, when the automobile breaks down, the automobile can be rapidly checked.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.