考虑功率分配的混合供电型开绕组永磁同步电机过调制算法  

An Overmodulation Scheme Considering Power Distribution for Hybrid-Inverter Driven Open-Winding Permanent Magnet Synchronous Motor System

作　　者：柯伟煌 孙丹[1] 马志豪 年珩[1] 赵建勇[1] Ke Weihuang;Sun Dan;Ma Zhihao;Nian Heng;Zhao Jianyong(College of Electrical Engineering Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电工技术学报》2023年第12期3176-3187,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51877197)。

摘　　要：针对混合供电型开绕组永磁同步电机系统因功率分配约束难以执行过调制的问题,提出一种考虑功率分配的新型过调制方法。首先分析了传统过调制方法对系统功率平衡的影响,定义了有功电压调制度,使过调制区在考虑功率分配的情况下得到更清晰的界定。为了平衡过调制区的功率分配以及保障不同调制区的平滑切换,基于重新界定的过调制区分别提出定子电压矢量和有功电压的过调制方法。实验结果验证了所提新型过调制方法的有效性和优越性。Hybrid-inverter driven open winding permanent magnet synchronous motor(HI-OW-PMSM)system has the advantages of high power factor,high voltage utilization,and high control accuracy.However,when the field-oriented control strategy is implemented in the HI-OW-PMSM system,an extra power distribution module is essential for the capacitor voltage constraint.The power distribution module limits the voltage ratio between two inverters,making a conventional overmodulation scheme challenging to be executed in the HI-OW-PMSM system.Therefore a novel overmodulation scheme considering power distribution is proposed.The influence of the conventional overmodulation scheme on the power balance of the HI-OW-PMSM system is analyzed.The modulation index of the stator voltage and the active voltage are redefined,and the overmodulation region is divided more accurately when considering the power distribution.Accordingly,a novel overmodulation scheme considering power balance is proposed.To balance the power of the HI-OW-PMSM system in the stator voltage overmodulation region and smooth the switching process from the linear modulation region to the overmodulation region,a stator voltage overmodulation scheme is proposed,and the reactive voltage is indirectly corrected.Furthermore,an active voltage overmodulation scheme is proposed,and the active voltage is corrected.Then,the proposed active voltage overmodulation scheme is derived from the case of six-step modulation,and the operation range of the HI-OW-PMSM system is further extended.In order to verify the superiority of the proposed method,comparative experimental studies among the conventional field-oriented control strategy(strategy),the conventionalⅠovermodulation strategy(strategyⅡ),and the proposed overmodulation strategy(strategyⅢ)are carried out in the experimental platform of the HI-OW-PMSM system.The static experimental results show that the critical speed of the proposed method is increased by about 14%and 9%,respectively.Besides,the current THD of the proposed metho

关 键 词：开绕组永磁同步电机 浮地电容 功率分配 过调制 

分 类 号：TM351[电气工程—电机]