The invention discloses a driving method for a permanent magnet motor. The driving method includes the steps that S100, the vehicle speed V, the motor rotor position theta r, the torque instruction value Te* and road condition information are obtained; S200, the current SOC estimated value S of a power battery is obtained; S300, when it is judged that the estimated value S is smaller than or equal to a set threshold value, a driving mode with the optimal efficiency is selected to drive the motor; S400, the driving mode with the optimal efficiency, a flux-weakening driving mode and a direct torque driving mode are adopted to calculate the first instruction value id*of motor d shaft currents and the first instruction value iq*of motor q shaft currents; S500, a d shaft current compensation value delta id* and a q shaft current compensation value delta iq* are calculated according to curve information; S600, according to a second instruction value iq**, a first instruction value id** and the motor rotor position theta r, pulse width modulation is carried out on an inverter. By means of the driving mode, the motor can adapt to different road conditions.
Driving method for permanent magnet motor
2016-01-27
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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