三相矢量下永磁同步电机占空比预测电流控制  

Duty-cycle Predictive Current Control of Permanent Magnet Synchronous Motor Under Three-phase Vector

作　　者：孙坚[1,2] 汪意和 SUN Jian;WANG Yihe(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,宜昌443002 [2]新能源微电网湖北省协同创新中心(三峡大学),宜昌443002

出　　处：《电力系统及其自动化学报》2023年第10期59-66,86,共9页Proceedings of the CSU-EPSA

基　　金：湖北省自然科学基金资助项目(2020CFB248)。

摘　　要：针对永磁同步电机在传统模型预测控制下,存在单个控制周期计算复杂、稳态电流波动较大、开关频率不固定等问题,提出一种三相电压矢量下的永磁同步电机占空比预测电流控制策略。该策略运用三相电压矢量进行预测控制,仅经3次预测后,利用最优、次优电压矢量进行一次占空比计算,经转化后即可得出两电平逆变器单控制周期内三相开关时间,从而输出任意幅值、相角的期望电压矢量。仿真结果表明,该策略与经典双矢量和三矢量预测电流控制相比,其控制性能更优异且耗时更短。Under the traditional model predictive control of permanent magnet synchronous motor(PMSM),there exist some problems,such as complicated calculation of a single control cycle,large fluctuation of steady-state current and unfixed switching frequency.To solve these problems,a duty-cycle predictive current control strategy for PMSM based on three-phase voltage vector is proposed.Under this strategy,the three-phase voltage vector is used for predictive con-trol.After only three predictions,the duty cycle is calculated by the optimal and suboptimal voltage vectors.After con-version,the three-phase switching time in a single control cycle of two-level inverter can be obtained,and the expected voltage vector with any amplitude and any phase angle can be output.Simulation results show that compared with the classical two-vector and three-vector predictive current controls,the proposed strategy has a better control performance and a shorter time consumption.

关 键 词：模型预测控制 永磁同步电机 占空比 期望矢量合成 无差拍控制 

分 类 号：TM351[电气工程—电机]