摘要
传统最优占空比控制只对q轴电流进行无差拍控制,d轴电流波动较大,三相电流总谐波畸变率较高,无功功率损耗严重。采用基于扩展电压矢量的最优占空比控制算法,通过增加备选电压矢量的种类,减小d轴电流波动,提升电机的电流稳态精度。提出的基于十二个备选电压矢量的最优占空比控制算法计算量较大,一定程度上增加了电机实时控制延迟,使用基于q轴电流无差拍控制的滚动电压矢量组预选策略,减小电流预测次数,提升电机控制的实时性和响应性能。基于Simulink的仿真结果表明:所提算法有效降低了d轴电流脉动,且滚动电压矢量组预选策略对PMSM电气参数变化具有较强的鲁棒性。
The traditional optimal duty cycle control is only based on the current deadbeat control principle of q axis, leading to a large ripple of the current of d axis, high total harmonic distortion of three phase current and high reactive power loss. A novel optimal duty cycle control algorithm based on extending the finite control set to twelve voltage vectors was proposed. The steady state performance was improved by decreasing the ripple of the current of d axis. In order to realize the real-time control of the permanent magnet synchronous motor, the proposed algorithm used a scrolling voltage vectors group preselecting strategy based on the current deadbeat control principle of q axis. It simplified the calculation, with reducing the burden on the microprocessor. The simulation results show that the proposed calculation-simplified extended optimal duty cycle model prediction current control algorithm decreases the ripple of d axis effectively, and the scrolling voltage vectors group preselecting strategy has a strong robustness.
作者
回家泽
米乾宝
顾鹏
张义
李庚
HUI Jiaze;MI Qianbao;GU Peng;ZHANG Yi;LI Geng(Xi’an Institute of Aerospace Precision Mechatronics,Xi’an 710100,China)
出处
《微电机》
2023年第1期78-85,共8页
Micromotors
