高效率永磁同步电机及其在车载空调中的应用研究

High efficiency permanent magnet synchronous motor and its application in automotive air conditioning

电动汽车用永磁同步电机能量来源为蓄电池,对效率要求较高。永磁同步电机因制造技术与实际工作环境因素等,其反电动势很难保证理想的正弦波形。本文针对永磁同步电机高效率的特点作进一步分析研究,在永磁同步电机成熟控制技术矢量控制与电流跟踪控制技术前提下引入针对非正弦反电动势的电流谐波注入法,通过谐波注入的方法来改变永磁同步电机的驱动电流来适应非正弦反电动势,减小转矩脉动,从而减少不必要的能量损耗,提高永磁同步电机的效率。

The energy source of the permanent magnet synchronous motor for electric is the storage battery, which requires high efficiency .Due to manufacturing technology and the actual working environment, it is difficult to guarantee the ideal sine wave of PMSM back electromotive force. Further analysis will be made with high efficiency of permanent magnet synchronous motor. A method of harmonic current injection for non sinusoidal back EMF is introduced, which based on the permanent magnet synchronous motor mature control technology of vector control and current follow control technology. Using the method of harmonic injection to change the driving current of permanent magnet synchronous motor to adapt to the non sinusoidal back EMF, reduced torque ripple, so as to reduce unnecessary energy loss and improve the efficiency of permanent magnet synchronous motor.