摘要
为了解决混合逆变器开绕组永磁同步电机(OW-PMSM)系统传统控制策略将电源与电容电压之比控制为某一固定比值的问题,提出一种简化模型预测控制(MPC)策略。根据电机运行需求动态调节两侧逆变器直流母线的电压比值,从而提升电机在不同运行工况下的性能,并拓展OW-PMSM的使用场景。但在电容侧直流母线电压不固定的情况下,传统MPC算法造成的计算负担较大,因而提出简化MPC策略。对两组逆变器精简后的7种待选矢量进行轮流遍历计算,选取最优电压矢量输出,能够在减小计算量、降低开关频率的同时,最大限度地提升d-q轴电流及电容电压控制精度。最后,实验验证了所提出控制策略在电流控制、电容电压控制以及开关频率降低方面均具备有效性。
In order to solve the problem that the traditional control strategy of hybrid inverter open-winding permanent magnet synchronous motor(OW-PMSM) system controls the voltage of power supply and the capacitor to a fixed ratio, a simplified model predictive control(MPC) strategy was proposed. The voltage ratio of the inverter DC bus from both sides according to the motor operation requirements to improve the performance of the motor was dynamically adjusted under different operating conditions, thus expanding the application scenario of OW-PMSM system. However, when the voltage of DC bus powered by the capacitor is not fixed, the traditional MPC algorithm could cause great calculation burden. By the proposed simplified MPC strategy a total of 7 candidate vector combinations was traversed and calculated in turn after the simplification of the vectors from two inverters, and the optimal output voltage vector was selected, which can not only reduce the amount of calculation and reduce the switching frequency but also maximize the control accuracy of d-q axis current and capacitor voltage. Finally, experimental results show that the proposed control strategy is effective in current control, capacitor voltage control, and switching frequency reduction.
作者
陈彦丞
王学庆
贺明智
毛耀
王政
CHEN Yan-cheng;WANG Xue-qing;HE Ming-zhi;MAO Yao;WANG Zheng(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;Key Laboratory of Optical Engineering,Chinese Academy of Sciences,Chengdu 610209,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2023年第1期120-127,共8页
Electric Machines and Control
基金
四川省科技专项(2019ZDZX0019)
四川省青年基金(2022NSFSC1888)。
关键词
开绕组永磁同步电机
模型预测控制
电容电压控制
双逆变器
电流控制
open-end winding permanent magnet synchronous motor
model predictive control
capacitor voltage control
dual inverters
current control
