Open AccessInvestigation of a hybrid excited doubly salient machine with permanent magnets located on stator slot openings
Author(s) -
Zheng Mei,
Cai Shun,
Zhu ZiQiang
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2019.0910
Subject(s) - stator , magnet , torque density , torque , excitation , finite element method , salient , mechanical engineering , topology (electrical circuits) , control theory (sociology) , computer science , engineering , structural engineering , physics , electrical engineering , artificial intelligence , control (management) , thermodynamics
This study proposes a hybrid excited (HE) doubly salient machine with permanent magnets (PMs) located on stator slot openings. The HE machine inherits the high torque density of PM machines as well as flexible magnetic field regulation of wound field machines. Since the PMs are located at stator slot opening, the PM flux is shunted in the stator without DC excitation, and the machine exhibits high fault‐tolerant capability at high‐speed operation. The proposed machine is optimised, together with a comparison with a conventional stator slot PM HE machine. It is revealed that the proposed HE machine exhibits a significantly higher torque density under the same copper loss and PM usage. Finally, a prototype is fabricated, and experiments have been conducted to verify the accuracy of finite element simulation on the proposed machine topology.