电动车用开关磁阻电机驱动系统

An Electric Vehicle Drive System Based on Switched Reluctance Motor

开关磁阻电机具有结构简单、转速范围宽、可靠性强、可控参数多等特点,适合作为电动车的驱动电机。首先介绍了电动车开关磁阻电机驱动系统组成,设计了以ds PIC30F6010A为主控制器和EPM570T100C5N为辅助控制器的车用控制器。设计了逻辑输入和逻辑输出电路,实现输入信号和输出信号的逻辑综合,简化控制系统设计。根据电机不同转速区域,设计了不同的控制策略,提高了电机调速范围和平滑度:在低速区域内,基于转速电流双闭环控制策略,采用电流斩波控制,限制绕组电流,减小转矩脉动,保证电机转速的稳定性能和跟随性能;高速区域采用电流斩波和开通角、关断角角度控制交错控制的方式,调整绕组导通位置,实现电机宽范围调速的目的。最后,在搭建的试验平台上验证了控制策略的可行性,对转速、电流波形进行了对比和分析,测试了车用开关磁阻电机驱动系统的调速性能。

Switched Reluctance Motor（ SRM） is suitable for electric vehicle（ EV） ＇s drive motor due to the merits of simple structure wide speed operation range,high reliability,variable control parameters,etc. Introduced a SRM drive system framework for EV firstly, and a controller based on ds PIC30F6010 A and EPM570T100C5 N was proposed. Input and output logic process circuits were designed which simplified the control system. Different algorithms were applied for different speed range in order to improve speed adjustable range and smoothness. At low speed stage,the control strategy based on speed and current double closed loop with current chopping control（ CCC）was introduced to limit phase currents and torque ripple,which aimed to ensure the speed stability and tracing performance. At high speed stage,CCC and APC（ angle position control） were applied in turn. By adjusting conducting angle,wide speed operation range was acquired. At last,experiments were carried out on the prototype to verify the proposed control algorithm＇s feasibility. By comparing and analyzing the current waveforms, speed adjustment performance of the SRM drive system for EV was tested.