Design and analysis of a new flux-intensifying permanent magnet brushless motor with multilayer flux barriers

作者：Yang, Shen^*; Zhu, Xiaoyong; Xiang, Zixuan; Fan, Deyang; Wu, Wenye; Yin, Jianing

来源：AIP Advances, 2017, 7(5): 056628.

DOI：10.1063/1.4974061

• MACHINE

This paper proposes a new flux-intensifying permanent magnet brushless motor for potential application in electric vehicles. The key of the proposed motor is to adopt the concept of flux-intensifying effect, thus the preferable flux-weakening ability and extended speed range can be achieved. The usage of segmented and relatively thinner permanent magnet (PM) in the proposed motor contributes to the increase of d-axis inductance L-d. In addition, the multilayer flux barriers along q-axis flux path will effectively decrease q-axis inductance L-q. As a result, the unique feature of L-d > L-q can be obtained, which is beneficial to extending the speed range of the proposed motor. Furthermore, the flux-intensifying effect can reduce the risk of irreversible demagnetization in PMs. The electromagnetic performances of the proposed motor are analyzed and investigated in details by using the finite element methods, which demonstrate the excellent flux-weakening capability and wide speed range can be achieved in the proposed FI-PMBL motor.

• 出版日期2017-5
• 单位江苏大学