[关键词]
[摘要]
永磁磁阻直线电机(PMRLM)能实现永磁和电流的双励磁,具有推力密度大和磁场可调的优点,并且其结构简单可靠,适用于各种大型装配工厂和物流分拣中心。但由于双凸极结构和永磁磁链谐波的存在,电机的磁链和推力脉动很大。针对上述问题,建立了PMRLM的数学模型,研究了基于电流解析计算的推力稳定控制,提出了一种能通过给定推力快速计算控制电流的策略,并搭建仿真平台。仿真结果证明了所提方法的有效性和鲁棒性。
[Key word]
[Abstract]
Permanent magnet reluctance linear motor (PMRLM) has the advantages of large thrust density and adjustable magnetic field because it can achieve dual excitation of permanent magnet and current, and its structure is simple and reliable. PMRLM is suitable for various large-scale assembly plants and logistics sorting center. However, due to the presence of double salient structure and permanent magnet flux harmonics, the flux and thrust ripples of the motor are large. Aiming at the above problems, the mathematical model of PMRLM is established, and the thrust stability control based on current analytical calculation is studied. A strategy that can quickly calculate the control current through a given thrust is proposed, and a simulation platform is built. The simulation results prove the effectiveness and robustness of the proposed method.
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