Contact parameter computation and analysis of air circuit breaker with permanent magnet actuator

Shuhua Fang, Heyun Lin, Siu Lau Ho, Xianbing Wang, Ping Jin, Yunkai Huang, Shiyou Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


An air circuit breaker (ACB) with novel double-breaker contact and permanent magnet actuator (PMA) is presented. Three-dimensional (3-D) finite element method (FEM) is employed to compute the electro-dynamic repulsion forces, including the Holm force and Lorentz force, which are acting on the static and movable contacts. The electro-dynamic repulsion forces of different contact pieces are computed, illustrating there is an optimal number of contact pieces for the ACB being studied. The electro-dynamic repulsion force of each contact, which varies from the outer position to the inner position, is also computed. Finally, the contacts of the double-breaker are manufactured according to the analyzed results to validate the simulations.
Original languageEnglish
Pages (from-to)595-602
Number of pages8
JournalJournal of Electrical Engineering and Technology
Issue number3
Publication statusPublished - 1 May 2013


  • Air circuit breaker
  • Double-breaker contact
  • Electromagnetic repulsion force
  • Permanent magnet actuator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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