内置式永磁同步电机驱动系统设计

Design of drive system for interior permanent magnet synchronous motor

基于内置式永磁同步电机(Interior Permanent Magnet Synchronous Motor,IPMSM)在两相旋转坐标系下的数学模型,结合电压电流约束条件,分析了最大转矩电流比(Maximum Torque Per Ampere,MTPA)控制策略和弱磁控制策略,确定了车用IPMSM的转矩控制方案。设计了以DSP为核心的硬件电路,开发了矢量控制软件,实现了模拟量采集、位置检测、参数管理和通信等功能,完成了IPMSM矢量控制运算。在电机实验台架上对驱动系统性能进行了测试,实验结果表明,该驱动系统能够对IPMSM进行有效地转矩控制,充分发挥电机的转矩输出能力,提高系统运行效率,满足电驱动车辆的使用要求。

According to the mathematic model of interior permanent magnet synchronous motor(IPMSM)on the two-phase rotating coordinate system,maximum torque per ampere(MTPA)control and field-weakening control were analyzed with the voltage and current restriction conditions.Torque control strategy for IPMSM was determined.Hardware and software were designed for IPMSM drive system.Analog signal acquisition,position detection,parameter management,communication and so on were realized and vector control calculation was carried out.The performance of the drive system was tested on an experiment system.The experiment results show that the torque can be controlled effectively and the drive can take full advantage of output torque of IPMSM.The system has high efficiency and can satisfy the requirement of electric vehicle.