Control method and system for solving abnormality of position sensor

Abstract

The invention relates to a control method and system for solving abnormity of a position sensor, and the method comprises the steps: monitoring whether a position angle signal collected by the position sensor is abnormal or not in real time, if yes, executing a step S2, and if not, executing a step S3; s2, switching to a position-free control mode, and performing motor control on a position-free angle signal calculated in the position-free control mode; and S3, motor control is conducted through position angle signals collected by the position sensor, on the basis of an existing position sensing control mode, a position-free control mode is introduced, a dual-mode working mode is achieved, when it is detected that the position sensor is abnormal, the position sensor can be rapidly switched to the position-sensor-free mode, the vehicle can continue to run normally, and the safety of the vehicle is improved. The situation of waiting for rescue is avoided, and vehicle control can be normally carried out even when the position sensor is abnormal.

Description

technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a control method and system for solving the abnormality of a position sensor. Background technique [0002] The position sensors of existing motor controllers generally include Hall sensors, magnetic (or photoelectric) encoders, resolvers, etc. Among them, resolvers are mainly used in vehicles, and their reliability and accuracy are relatively high. However, no matter what kind of position sensor it is, identification and decoding circuits are required, which has some disadvantages: when the sensor body is abnormal or the decoding circuit has problems, the vehicle will be unable to drive and can only wait for rescue; When driving, due to the existence of sensor hardware structure errors and decoding delays, the controller's identification of the motor position will have accuracy deviations, resulting in low efficiency and even unstable vehicle control. Conte...

AI Technical Summary

Problems solved by technology

However, no matter what kind of position sensor it is, identification and decoding circuits are required, which has some disadvantages: when the sensor body is abnormal or the decoding circuit has problems, the vehicle will be unable to drive and can only wait for rescue; When driving, due to the existence of sensor hardware structure errors and decoding delays, there will be accuracy deviations in the controller's identification of the motor position, resulting in low efficiency and even unstable vehicle control

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