Abstract：A new negative salient pole permanent magnet synchronous motor（PMSM）was presented. The magnetic bridge between the adjacent segmental permanent magnet and adjusting iron core are used to provide the direct axis magnetic flux path. Therefore, the d-axis inductance is greater than the q-axis inductance. At low speed, positive d-axis current is adopted to control positive magnetic resistance torque, and positive d-axis current can effectively improve the working point of permanent magnet. At high speed, relatively small d-axis flux weakening current is used to weaken air gap flux and improve the flux weakening range of the motor effectively. The model of d-q-axis magnetic circuit for the new negative salient pole permanent magnet synchronous machine was established. The characteristics of electromagnetic torque and flux weakening of the new negative salient pole permanent magnet synchronous motor were analyzed, and the finite element analysis was carried out. The theoretical analysis results agree with the simulation results, which verify the validity and feasibility of the flux weakening of the negative salient pole permanent magnet synchronous motor.
李春艳, 王豫, 孟涛. 反凸极永磁同步电机弱磁特性分析[J]. 电工技术学报, 2019, 34(zk2): 474-483.
Li Chunyan, Wang Yu, Meng Tao. Research on Flux Weakening Characteristics of a Negative Salient Pole Permanent Magnet Synchronous Motor. Transactions of China Electrotechnical Society, 2019, 34(zk2): 474-483.
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2019, Vol. 34 
