摘要
针对表贴式永磁同步电机(SPMSM)传统滑模观测器(SMO)中符号函数在零点切换的不连续性产生严重抖振和获取转子位置信息时估算不精确导致相位滞后的现象,提出一种新型SMO。该观测器引入可连续控制的饱和函数替代符号函数来提升对抖振的抑制作用;用基于锁相环(PLL)的位置检测替换传统反正切获取转子位置,使估算值更接近实际转子位置;同时运用反向差分变换法计算微分方程,降低了系统复杂性和噪声。仿真结果表明,该观测器的抑制抖振效果和鲁棒性能优于传统观测器。
In the traditional sliding mode observer(SMO)of surface mounted permanent magnet synchronous motor(SPMSM),the discontinuity of sign function at zero point leads to severe chattering and inaccurate estimation of rotor position information,which further leads to phase lag.Aiming at the problem,a new SMO is proposed.The observer introduces a continuously controlled saturation function to replace the sign function to suppress the chattering.The position detection based on phase-locked loop(PLL)is used to replace the traditional arctangent estimation,which makes the estimated value closer to the actual rotor position.The reverse difference transformation method is used to calculate the differential equation,which reduces the system complexity and noise.The simulation results show that the chattering suppression effect and robustness of the new observer are better than that of traditional observers.
作者
李中胜
周士贵
张可程
LI Zhongsheng;ZHOU Shigui;ZHANG Kecheng
出处
《现代机械》
2023年第3期56-60,共5页
Modern Machinery
基金
山东省自然科学基金面上项目(ZR2021ME017)
科技型中小企业创新能力提升工程(2021TSGC1429)。
关键词
永磁同步电机
滑模观测器
锁相环
反向差分
permanent magnet synchronous motor
sliding mode observer
phase-locked loop
reverse difference
