基于简化的SVPWM的PMSM磁场定向控制系统

摘要

为促进数字信号处理器(digital signal processor，DSP)的实时计算，提出简化的空间矢量脉宽调制(space vector pulse-width modulation，SVPWM)算法。通过建立特殊的坐标系，将传统的SVPWM算法中的6个扇区的划分简化至3个扇区，使相应的计算更加简单。在永磁同步电机磁场定向控制的理论基础上，完成了伺服控制系统的硬件以及软件的设计。硬件电路的设计是以TMS320F2812和智能功率模块(PS21563-P)为核心器件，系统的软件设计中采用了磁场定向控制(field oriented control，FOC)算法及简化的SVPWM技术，系统采用电流环、速度环的双闭环结构，实现伺服系统的高精度控制。实验结果证明了简化 SVPWM 算法的可行性，同时，该伺服系统运行稳定可靠，具有良好的控制性能。%　　In order to improve real-time computation of the digital signal processor (DSP), a simplified space vector pulse width modulation algorithm is proposed in the paper. The six sectors in the traditional SVPWM algorithm are reduced to three through establishing a special coordinate system, which makes corresponding calculation simpler. On the basis of permanent magnet synchronous motor (PMSM) field oriented control theory, the design of servo control system which includes hardware and software has been completed. The design of hard circuit based on TMS320F2812 and intelligent power module (PS21563-P). The field oriented control algorithm and simplified SVPWM technology is used in the software design of the whole servo system for PMSM. In order to realize high precision, the servo system is designed as current and speed dual closed loops. The experimental results indicate the feasibility of simplified SVPWM algorithm, and the system is stable and reliable, which has an excellent performance.