Research on Bipolar Nonsalient Pole Transmitter for High-Power EV Dynamic Wireless Power Transfer System

Fandan Zhao, Jinhai Jiang, Shumei Cui, Xingjian Zhou, Chunbo Zhu, Ching Chuen Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


In this article, a design of bipolar nonsalient pole (BNSP) transmitter, which originates from motor theory, for high-power EV dynamic wireless power transfer (DWPT) system is proposed. To analyze and evaluate BNSP transmitter in aspect of principle, characteristic, and performance, the existing I-type, S-type, and N-type transmitters in DWPT application are classified as bipolar salient pole (BSP) transmitter, which establishes a reference for comparing. The design parameters and other contrast conditions of BNSP and BSP transmitters are given. Coupling flux and leakage flux of BNSP transmitter are analyzed by comparing the magnetic models and the finite-element models of BNSP and BSP transmitters. Based on the modular design in practical application, the sensitivity of coupling performance to the module gap in BNSP and BSP transmitters is analyzed and compared in simulation. All theoretical results are verified by contrast experiments. The maximum effective mutual inductance of BNSP transmitter is about 31.0% larger than that of BSP transmitter, and the efficiency of the system with output power of 10 kW is 93.5% with BNSP transmitter, about 2.4% higher than that with BSP transmitter. Besides, BNSP transmitter needs 5.9% shorter Litz wire and 53.1% smaller volume of cores, which makes it smaller in size.

Original languageEnglish
Pages (from-to)2404-2412
Number of pages9
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - 1 Feb 2022
Externally publishedYes


  • Bipolar transmitter
  • dynamic wireless power transfer (DWPT)
  • electric vehicle (EV)
  • nonsalient pole
  • wireless power transfer (WPT)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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