The invention relates to an electric vehicle encoder connection-losing detection system and method. The system comprises an encoder and a motor, and the encoder and the motor synchronously rotate. The system further comprises a motor controller connected to the motor and a signal acquisitionunit connected with the motor controller and the motor; the motor controller comprises a phase calculation unit and a shutdown control unit. The signal acquisition unit is used for obtaining the actual rotating speed of the motor; the phase calculation unit is used for providing the set target rotating speed and obtaining a directional phase and an observation phase according to the target rotating speed and the actual rotating speed; and the shutdown control unit is used for judging whether the encoder loses connection through comparison between the difference value of the directional phase and the observation phase and the preset difference value, and controlling the motor to stop running when the encoder loses connection. According to the system, the connection-losing failure of the encoder can be found in time, and the phenomenon that the motor is locked is avoided.
Electric vehicle encoder connection-losing detection system and method
2015-04-08
Patent
Electronic Resource
English
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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