A New Slot-PM Vernier Reluctance Machine with Enhanced Zero-Sequence Current Excitation for Electric Vehicle Propulsion

Xing Zhao, Shuangxia Niu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


This paper aims to propose a new Vernier reluctance machine (VRM), which integrates the advantages of a robust rotor structure, good torque density, and flexible flux control ability. The key is to establish the excitation field with both stator slot permanent magnets (PMs) and zero-sequence current. Two excitation sources have different pole pair numbers but share a parallel magnetic circuit and contribute to superimposed torque in this machine. Meanwhile, a flexible flux control can be achieved by regulating zero-sequence current, and little demagnetization risk exists for slot PMs during flux control. In this paper, the machine configuration and operation principle are introduced, along with its integrated ac and dc drive method. Electromagnetic performance of this new machine is evaluated by finite-element analysis. Leading design parameters are determined and optimized considering optimal injection ratio of zero-sequence current. A prototype is fabricated, and relevant experiment results demonstrate the feasibility of the proposed solution.

Original languageEnglish
Article number8734879
Pages (from-to)3528-3539
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number5
Publication statusPublished - May 2020


  • Integrated ac and dc drive
  • slot PMs
  • Vernier reluctance machine
  • zero-sequence current

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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