Vehicle breakdown control method, motor controller and vehicle

Abstract

The invention discloses a vehicle breakdown control method, a motor controller and a vehicle. The vehicle breakdown control method comprises the steps that when the torque abnormal breakdown occurs, the duration time of the torque abnormal breakdown is collected; whether the duration time exceeds the response time of a second-level breakdown protection mechanism or not is judged; and if the duration time exceeds the response time of the second-level breakdown protection mechanism, a driving motor is controlled to stop torque output. According to the vehicle breakdown control method, under the situation that second-level protection loses efficacy, the driving motor can be controlled to stop torque output, the situation that the vehicle speed of the vehicle is out of control is avoided, the reliability of the vehicle is improved, and the safety of the vehicle is effectively ensued.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle fault control method, a motor controller and the vehicle. Background technique [0002] During the driving process of the vehicle, once there is a problem with the motor control system, such as a problem with the resolver position sensor circuit, the initial position angle of the motor is inaccurate, or the PI parameters of the current loop are inappropriate, etc., the motor torque will be out of control, and the vehicle speed cannot be controlled. Especially when the vehicle is driving at high speed, it is more dangerous. If you only rely on the brakes, it will take 1 to 2 minutes to stop the vehicle. At that time, the vehicle may have been crashed, especially for the prototype test, it is more likely to appear Motor torque runaway fault. [0003] In related technologies, by monitoring the deviation between the motor feedback torque and the target torque, when the...

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Problems solved by technology

[0004] However, related technologies do not take into account the abnormality of the VMS state, such as VMS instruction delay or failure to receive instructions, thus failing to shut down the MCU drive in time, resulting in failure of the secondary fault protection mechanism, such as the feedback torque cannot respond to the target torque instruction, or even Feedback torque does not decrease but increases, causing the vehicle speed to keep rising, leading to accidents

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