[关键词]
[摘要]
滑模观测器(SMO)的高鲁棒性使其在永磁同步电机(PMSM)无传感器控制系统中成为了研究热点之一。针对传统SMO的计算量大及自身存在的高频抖振现象,主要研究了PMSM无传感器中高速控制过程,设计了一种新型SMO,将边界层和锁相环(PLL)技术共同应用于SMO中,理论分析并建立PMSM的SMO数学模型后,对PLL的设计进行了严格的推导,验证其获得转子位置的精确性。最后,对整体设计方案进行了全面的仿真和试验,结果表明新型SMO对高频抖振的抑制效果显著,且具有更高的精确性和更强的鲁棒性。
[Key word]
[Abstract]
In the sensorless control system of permanent magnet synchronous motors(PMSMs), the high robustness of the sliding mode observer has been a research hotspot. To solve the problems of large amounts of calculation of the traditional sliding mode observer (SMO) and its high-frequency chattering, a new SMO for the medium and high speed sensorless control process of PMSM is designed. The boundary layer and phase-locked loop (PLL) technology are applied in SMO, and the mathematical model of SMO is built. The design of PLL is strictly deduced, and the precision of rotor position is reasonably verified. Finally, the design is implemented by simulation and experiment. The results show that the proposed new SMO has good suppression of high-frequency chattering. Simultaneously, the precision and robustness of the new SMO are higher.
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