基于改进最大转矩电流比控制的电动汽车用内嵌式永磁同步电机驱动控制系统

摘要

环境污染及能源危机直接推动了传统燃油汽车向环保型电动汽车的发展,作为电动汽车关键部件之一的电机驱动控制系统,直接影响着电动汽车未来的发展前景.在电机驱动控制系统运行的过程中,针对内嵌式永磁同步电机(IPMSM)仍采用较简单的id=0控制方式不能满足汽车大转矩的要求;采用传统的最大转矩电流比(MTPA)查表控制方式,由于存在大量离散数据点,会严重影响整个系统的响应速度.针对以上问题,提出了等效综合电流矢量控制的MTPA控制方法.首先建立了永磁同步电机(PMSM)的数学模型,分析了id=0和MTPA矢量控制方式的基本原理,给出了新型MTPA的控制方案.通过Simulink仿真及样机试验,对比了两种矢量控制方式,验证了等效综合电流矢量控制的MTPA控制方式的可行性及优越性.%Environmental pollution and energy crisis directly promoted the traditional fuel cars to the development of environment-friendly electric vehicles (EVs).As one of the key components of EVs,motor drive control system directly affected prospects of EVs in future.In the motor drive control system operation process,the interior permanent magnet synchronous motor (IPMSM) used a relatively simple id =0 control mode could not meet the high torque requirements of automobile.Due to a large number of discrete data points,the look-up table control mode of traditional maximum torque per ampere (MTPA) would seriously affect the speed response of system.To solve above problems,an improved MTPA control method with equivalent integrated current vector control was presented.At first,the mathematical model of permanent magnet synchronous motor (PMSM) was established to analyze the basic principle of id =0 and MTPA vector control mode to present a novel MTPA control method.To compare the two methods of vector controls,the feasibility and superiority of integrated equivalent current control of MTPA was verified by simulation and prototype experiment.