1.University of Chinese Academy of Sciences;2.Institute of Electrical Engineering, Chinese Academy of Sciences,
The Strategic Priority Research Program of Chinese Academy of Sciences
A predictive current control method is presented to fulfill the purpose of high steady and dynamic performance in the flux-weakening region of PMSM drives for electric vehicle applications. The voltage limitation problem in the flux-weakening region is analyzed in detail, furthermore, the stability problem of dynamic overmodulation is introduced. Accordingly, a dynamic overmodulation strategy considering stability and dynamic characteristics is proposed. Further, the model-based predictive current control algorithm is investigated, in which the advantages of fast dynamic response and manageable constraints help to improve the stability and dynamic performance in the flux-weakening region. Finally, the effectiveness of the proposed algorithm is ultimately detailed according to simulation and experi-mental results.