[关键词]
[摘要]
针对传统表贴式永磁同步电机(SPMSM)模型预测转矩控制(MPTC)备选电压矢量数目多,计算负担较大等问题,将传统MPTC的7个备选电压矢量精简为1个由开关表输出的电压矢量和1个零电压矢量。仿真结果表明:该控制策略可有效减小转矩脉动和平均开关频率,消除了转速阶跃下的磁链脉动,并将MPTC的运算次数降低到2次或者0次,减少了系统的运算负担。为了进一步提升系统动态特性,提出根据系统状态将直接转矩控制(DTC)与MPTC自适应切换控制的策略。系统处于稳态时,采用基于开关表的MPTC;系统处于动态时,采用DTC。仿真结果表明:该策略结合了MPTC和DTC的优点,在保持控制效果的同时,提高了转矩动态响应,消除了动态下磁链脉动。
[Key word]
[Abstract]
The traditional model predictive torque control (MPTC) of surface permanent magnet synchronous motor (SPMSM) uses all 7 voltage vectors generated by inverter as candidate voltage vectors, which brings large calculation burden. Based on switching table used in direct torque control (DTC), it is proposed to use a voltage vector generated by switching table and a zero voltage vector as candidate voltage vectors of MPTC. Simulation results show that the proposed strategy can decrease torque ripple and average switching frequency compared with traditional MPTC, and the calculation burden is reduced. twice to or once In order to improve the dynamic response, an adaptive control strategy is given: when the system is at steady state, the MPTC based on switching table is used; when the system is at dynamic state, DTC is used. Simulation results show that the proposed method combines the advantages of MPTC and DTC, improves torque dynamic response and suppress stator flux ripple at dynamic state.
[中图分类号]
[基金项目]
国家自然科学基金项目(51207012);陕西省工业科技攻关项目(2016GY-069);陕西省微特电机及驱动技术重点实验室开放基金项目(2013SSJ2002);中央高校基本科研业务费专项资金项目(300102228201)