Motor phase current overcurrent detection method and device, motor controller and vehicle

Abstract

The invention provides a motor phase current overcurrent detection method and device, a motor controller and a vehicle, and the method comprises the steps: collecting a phase current instantaneous value and a corresponding rotor angle value of a motor in each detection period at a preset sampling frequency, wherein the directions of the phase current instantaneous values of the motor in each detection period are the same; determining an angle accumulated value corresponding to each detection period according to the phase current instantaneous value and the corresponding rotor angle value of the motor in each detection period; and if the angle accumulated value corresponding to the detection period is greater than the angle threshold value, determining that the motor phase current is over-current in the detection period. According to the method, the angle accumulated value is determined by using the phase current of the motor and the corresponding rotor angle value on the premise of not increasing the hardware cost, so that the overcurrent detection of the phase current of the motor is realized according to the angle accumulated value, and the detection cost is reduced on the basis of ensuring that the detection result is reliable and accurate.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor phase current overcurrent detection method and device, a motor controller, and a vehicle. Background technique [0002] As a power energy output device, the motor has more and more diverse application scenarios, so the control of its output torque is extremely important. If you want to control the motor to output a stable torque, you must control the phase current supplied by the motor controller to the motor. If the phase current is too large, it will not only cause the motor to burn out, but also cause dangerous accidents, thus endangering personal safety. Therefore, it is very necessary to diagnose the overcurrent of the motor phase current. [0003] In the related art, when the rotor of the motor is rotating, the hardware circuit is mainly used to diagnose the overcurrent of the current, that is, to judge whether the current is overcurrent by building a logic circuit, ...

AI Technical Summary

Problems solved by technology

If the phase current is too large, it will not only cause the motor to burn out, but also cause dangerous accidents, thus endangering personal safety. Therefore, it is very necessary to perform over-current diagnosis on the motor phase current

[0003] In related technologies, when the motor rotor is rotating, the hardware circuit is mainly used to diagnose the current overcurrent, that is, to judge whether the current is overcurrent by building a logic circuit. This method increases the development cost

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