基于双CPU的永磁同步电机全数字伺服系统设计

Design of PMSM Full-Digital Servo System Based on Two CPU

根据永磁同步电机(PermanentMagnetSynchronousMotor-PMSM)特点,设计并实现了其双CPU控制的数字伺服系统。利用数字信号处理器(DSP)芯片和复杂可编程逻辑器件(CPLD)芯片分别实现了电流检测模块、转子位置和转速辨识模块、触发脉冲生成模块。提出了一种基于位置模糊控制策略的启动方法,有效解决了传统直流转矩定位方法的转子退磁问题。最后采用空间电压矢量法(SVPWM),通过C语言编程实现了永磁同步电机的转速调节,实验结果表明系统具有良好的动态响应和稳态性能。

According to the characteristic of permanent magnet synchronous motor (PMSM), this paper realized its full-digital servo system based on two CPU. The system is controlled by digital signal processor (DSP) and complex programmable logical device (CPLD), which includes testing modules for phase currents, rotor position and rotor speed, and modulation of trigger pulse. Proposed a vague location control method to launch the rotor, which is an effective solution to the problem of weakening magnetic field caused by traditional DC torque methods. Based on the SVPWM control method, the PMSM speed adjustment through DSP C language was realized. The results indicate that, this system has prompt dynamic response and well steady-state behavior.