直线电机脉宽调制算法及仿真研究

为解决目前常规空间矢量脉宽调制(SVPWM)算法存在的计算繁琐、难以数字化实现的缺点,在综合分析永磁直线同步电机(PMLSM)控制原理的基础上,提出了一种用于永磁直线同步电机的新型SVPWM快速算法。该算法通过永磁直线同步电机位移传感器的检测值完成扇区判断与开关工作时间的计算。最后,通过Matlab/Simulink建立了仿真模型。仿真结果表明,该算法效果良好,解决了常规SVPWM算法由于反正切函数运算而导致系统响应慢、控制精度低的问题,具有一定的实用性与可行性。

Pulse width modulation algorithm and simulation based on linear motor

In order to solve the problem of computational complexity and reduce the difficulty on implementing digitization with space vector pulse width modulation（SVPWM）, a novel rapid algorithm for SVPWM was proposed based on the comprehensive analysis of the control principle of permanent magnet linear synchronous motor（PMLSM）. The sector judgment and the calculation of switching time can be calculated based on the data from the displacement sensor of PMLSM. Finally, the model of the algorithm was established in Matlab/ Simulink. The simulation results show that the novel algorithm is practical and feasible, the problems of low response and low control accuracy from inverse tangent calculation in conventional SVPWM is solved.