Thermal field calculation and analysis of an air-core compulsator

Weiduo Zhao, Shumei Cui, Qing Liu, Shaopeng Wu

Research output: Journal PublicationArticlepeer-review

9 Citations (Scopus)


In order to maximize power densities, compulsators are designed as an air-core prototype. However, new problems have also been brought out by the new structure. Due to the poor thermal conductivity of composite materials, heat dissipation of the machine is severe, and heat performance estimate becomes vital during continuous discharges. In this paper, transient FEM thermal field analysis model had been built, on the basis of equivalent winding and air gap model. An iterative method to calculate the air temperature inside the machine had been proposed as well, and the results had been verified by experiments. When analyzing the compulsator under a typical railgun load, a loss calculation method based on FEM electromagnetic had been proposed. The temperature distributions under different operation conditions had been discussed, and the safe continuous discharge period had been calculated. The research process mentioned provides the theoretical and experimental guides for optimization and discharge experiments in the future.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Issue number27
Publication statusPublished - 25 Sept 2011
Externally publishedYes


  • Air-core
  • Compulsator
  • Finite element method (FEM)
  • Loss calculation
  • Thermal field

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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