Method for motor phase loss diagnosis, motor controller, management system and vehicle

Abstract

Embodiments of the present invention provide a motor phase loss diagnosis method, a motor controller, a management system, and a vehicle, wherein the method applied to a motor controller includes: when detecting that a motor has a phase loss fault, obtaining the current Speed ​​and three-phase current; if the preset judgment conditions are met, the actual current of the D-axis and the actual current of the Q-axis are obtained; according to the actual current of the D-axis, the test current of the D-axis and the actual current of the Q-axis, the test current of the D-axis and the test current of the Q-axis are obtained Current; according to the D-axis test current and the Q-axis test current, a fault detection is performed; if the motor is detected to have a phase-loss fault again, a motor phase-loss fault signal is output to the vehicle controller. In the technical solution provided by the embodiments of the present invention, when the motor has an open-phase fault and meets the preset judgment conditions, the D-axis current and the Q-axis current are adjusted and then judged again, which is beneficial to reduce the failure of the motor phase-opening diagnosis. error rate.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a method for diagnosing a motor phase loss, a motor controller, a management system and a vehicle. Background technique [0002] The lack of phase diagnosis of the motor is of great significance in electric vehicles, but in the process of diagnosing whether the motor has a lack of phase in the prior art, it is easy to find that the motor has output torque but the shaft speed is low and the electrical angle makes the three-phase current When one of the phases happens to stay at a very low value, a misjudgment occurs, which in turn causes the electric vehicle to take wrong countermeasures and affects the user experience. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a motor phase loss diagnosis method, a motor controller, a management system and a vehicle, so as to solve the problem that the current motor is prone...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a motor phase loss diagnosis method, a motor controller, a management system and a vehicle, so as to solve the problem that the current motor is prone to problems when the motor speed is low and the phase current is relatively low when performing phase loss diagnosis. The problem of misjudgment of hours

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