Method, storage medium and equipment for controlling motor

Abstract

The invention relates to a method, a storage medium and equipment for controlling a motor. The method comprises steps as follows: (1) determining a negative voltage component to be applied to an alphaaxis and a beta axis of the motor, wherein the alpha axis and the beta axis are two-phase stationary axes corresponding to three-phase axes of the motor; (2) calculating a PWM (pulse width modulation) signal used for controlling an inverter on the basis of the negative voltage component, wherein the inverter is used for providing three-phase alternating current for the motor; (3) applying the PWMsignal to the inverter; (4) after preset time, performing active short-circuiting operation on the motor. Compared with the prior art, the negative control voltage component is applied to the motor,one virtual resistor is added to a resistor of the motor equivalently, and transient current in an active short-circuiting circuit of the motor is accurately and timely reduced without motor rotor position information.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method, storage medium and equipment for controlling a motor. Background technique [0002] As the main power source of electric vehicles, when the motor control system fails, the motor needs to enter a safe state to ensure that the vehicle is under control and will not cause harm to the occupants. However, when the motor controller has a hardware or software failure and the output of the motor is abnormal, the output of braking torque or driving torque is very dangerous. So at present, in electric vehicles, it is usually required that the motor turn off the torque output after entering a safe state, so that the vehicle is in a coasting state, so that the driver can drive the car out of the lane for help. [0003] In the event of a motor controller failure, IGBT operation of any complexity may be unreliable. In the functional safety development of the motor controller, the torque...

AI Technical Summary

Problems solved by technology

The main disadvantage of active short-circuit operation is: in the process of switching active short-circuit, there will be a large transient current, and after entering the steady state, a certain braking torque will also be output

This method can avoid too much overcurrent, but it needs to know the position information of the motor rotor

[0007] In short, for the current technology that needs to be based on the position information of the motor rotor to achieve the reduction of the transient current of the motor active short circuit, no effective solution has been proposed yet.

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