永磁同步电机具有运行平稳、惯量低、效率和功率因数高等优点,有效解决现有光电设备中直流电机的惯量大、需要维护等系列问题。介绍了永磁同步电机的数学模型简化条件,给出了一种基于磁场定向的空间矢量控制原理,推导了空间电压矢量SVPWM的实现算法,最后进行了永磁同步电机的空间矢量控制实验研究。实验结果验证了该算法的可行性,电机伺服系统能够进行无超调的跟踪控制,具有较好的动态性能和较强的鲁棒性。

Space vector pulse width modulation is a kind of control technology by controlling the voltage pulse width or period to achieve the variable frequency or voltage regulation and decrease the harmonic content, which is used in the new type permanent magnet synchronous motor servo system. The mathematical model of permanent magnet synchronous motor is established. A kind of magnetic field oriented space vector control principle is introduced. Space voltage vector pulse width modulation algorithm is derived in details. Finally, space vector control of permanent magnet synchronous motor is studied experimentally. The results demonstrate the feasibility of control algorithm. The motor servo system can run smoothly with better dynamic performance and robustness.