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Simplified simulation methods for polyphase brushless DC motors

Author

Listed:
  • Figueroa, J.
  • Brocart, C.
  • Cros, J.
  • Viarouge, P.

Abstract

This paper presents a simulation method for brushless DC motors. The purpose of this method is to provide a solution to the initial design process, where the simulation speed is important due to the numerous variables that have to be considered. The method requires a reduced number of parameters in order to simplify it and to facilitate the design process. It is applicable to polyphase motors regardless of its connection or phase number. The simulation method can simulate the phase current control system or a DC bus current feedback system. The later control system is widely used in low-cost brushless DC motors. The simulation method is based upon the average value modelling of the inverter leg, at the PWM scale, in different modulation conditions, modelling almost all the inverter structures with transistors as active elements. The experimental results from a seven-phase brushless DC motor with one uncontrolled phase validate the modelling method. The comparison of the average torque, the current, voltage and torque waveforms in several operating conditions shows that the simulation method can predict the comportment of a brushless DC motor without an excessive computational burden, so it can be readily used as a design tool for this kind of motor.

Suggested Citation

  • Figueroa, J. & Brocart, C. & Cros, J. & Viarouge, P., 2003. "Simplified simulation methods for polyphase brushless DC motors," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 63(3), pages 209-224.
    • Handle: RePEc:eee:matcom:v:63:y:2003:i:3:p:209-224
    DOI: 10.1016/j.matcom.2003.07.002
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