Simulation and experimental analysis of a brushless electrically excited synchronous machine with a hybrid rotor

Fengge Zhang, Guanglong Jia, Yunwu Zhao, Zheng Yang, Wenping Cao, James L. Kirtley

Research output: Contribution to journalArticlepeer-review


Electrically excited synchronous machines with brushes and slip rings are popular but hardly used in inflammable and explosive environments. This paper proposes a new brushless electrically excited synchronous motor with a hybrid rotor. It eliminates the use of brushes and slip rings so as to improve the reliability and cost-effectiveness of the traction drive. The proposed motor is characterized with two sets of stator windings with two different pole numbers to provide excitation and drive torque independently. This paper introduces the structure and operating principle of the machine, followed by the analysis of the air-gap magnetic field using the finite-element method. The influence of the excitation winding's pole number on the coupling capability is studied and the operating characteristics of the machine are simulated. These are further examined by the experimental tests on a 16 kW prototype motor. The machine is proved to have good static and dynamic performance, which meets the stringent requirements for traction applications.
Original languageEnglish
Article number8115007
Number of pages7
JournalIEEE Transactions on Magnetics
Issue number12
Early online date29 Jun 2015
Publication statusPublished - Dec 2015

Bibliographical note

© 2015 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.


  • brushless excitation
  • finite element method
  • hybrid rotor
  • magnetic field modulation
  • synchronous machines


Dive into the research topics of 'Simulation and experimental analysis of a brushless electrically excited synchronous machine with a hybrid rotor'. Together they form a unique fingerprint.

Cite this