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Analysis of a stand-alone permanent-magnet synchronous generator using a time-stepping coupled field-circuit method

Analysis of a stand-alone permanent-magnet synchronous generator using a time-stepping coupled field-circuit method

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  • Author(s): T.-F. Chan 1 ; L.L. Lai 2 ; L.-T. Yan 3
    • View affiliations
    • Affiliations: 1: Department of Electrical Engineering, Hong Kong Polytechnic University, Kowloon, China
      2: Department of Electrial Engineering, City University, London, UK
      3: Department of Electrial Engineering, Tsinghua University, Beijing, China
  • Source: Volume 152, Issue 6, November 2005, p. 1459 – 1467
    DOI:  10.1049/ip-epa:20050126 , Print ISSN 1350-2352, Online ISSN 1359-7043
© IEE
Published

The performance analysis of a stand-alone permanent-magnet synchronous generator with inset rotor using a coupled-circuit, time-stepping, two-dimensional finite-element method is described. The direct-coupled field-circuit method enables the instantaneous values of the field and circuit variables to be solved simultaneously, without having to evaluate the synchronous reactances and the load angle. Magnetic saturation is accounted for by considering the flux densities in the elements of the field solution region. Besides the load characteristics, the coupled field-circuit solution also yields other useful machine information including the flux plots, components of the air-gap flux density, and the waveforms of voltages and currents. The flux plots obtained clearly demonstrate the effect of armature current on the interpolar flux that helps to improve the voltage regulation. Good agreement between the computed and experimental results has been obtained on a 2.5 kVA prototype generator.

Inspec keywords: finite element analysis; voltage control; machine control; standby generators; coupled circuits; synchronous generators; magnetic flux; permanent magnet generators

Other keywords: stand-alone generators; synchronous reactance; finite-element method; air-gap flux density; voltage regulation; time-stepping; 2.5 kVA; coupled field-circuit method; magnetic saturation; permanent-magnet synchronous generator

Subjects: Voltage control; Finite element analysis; Synchronous machines; Finite element analysis; Control of electric power systems

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