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Title: A novel hybrid dual-PM machine excited by AC with DC bias for electric vehicle propulsion
Authors: Wang, QS 
Niu, SX 
Luo, X 
Issue Date: Sep-2017
Source: IEEE transactions on industrial electronics, Sept. 2017, v. 64, no. 9, p. 6908-6919
Abstract: This paper proposes a novel hybrid-excited dual-PM machine for electric vehicle propulsion. The key is to use an integrated stator winding to replace the armature winding and the field winding in the conventional hybrid-excited machine. The stator winding is excited by ac current with dc bias, in which the ac component is used to produce the rotating armature field, while the dc bias current is used for the flux regulation. Therefore, the function of the ac and dc windings can be incorporated and realized by using just one set of winding. The torque density and flux regulating capability can be improved, and the winding configuration is also simplified. In addition, dual-PM excitation structure combines the advantage of stator-PM doubly salient machine and rotor-PM magnetic-geared machine, which can further enhance the torque capability. The operating principle and control strategy of the proposed machine are discussed. The electromagnetic performances are studied using the time-stepping finite-element method. A machine prototype is manufactured and experimental tests are conducted to verify the effectiveness of the machine design.
Keywords: DC bias
Flux regulation
Hybrid-excited machine
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE transactions on industrial electronics 
ISSN: 0278-0046
EISSN: 1557-9948
DOI: 10.1109/TIE.2017.2682778
Rights: ©2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following publication Q. Wang, S. Niu and X. Luo, "A Novel Hybrid Dual-PM Machine Excited by AC With DC Bias for Electric Vehicle Propulsion," in IEEE Transactions on Industrial Electronics, vol. 64, no. 9, pp. 6908-6919, Sept. 2017 is available at
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