Title: Modelling and simulation of control system for brushless DC motor

Authors: Hua Ji, Zhiyong Li

Addresses: Department of Electrical and Electronic Engineering, Shandong University of Technology, Zibo, Shandong, China. ' Department of Mechanical Engineering, Shandong University of Technology, Zibo, Shandong, China

Abstract: Based on the mathematical model of the brushless DC motor (BLDCM), using a novel method of modularisation design for modelling and simulation, the isolated functional blocks, for instance, BLDCM body block, speed PI controller block, current hysteresis controller block, current reference block, inverter block and commutation logic block, have been modelled in Matlab/Simulink. By the organic combination of these blocks, the simulation model of control system for BLDCM has been established. Additionally, some simulation works such as current waveform, back EMF waveform, torque curve and rotor speed curve have been done in this study. The simulation results indicate that the established model based on the new method proposed in this study has a good response to the rotor speed and torque and possesses quick simulation pace, which offers foundation for the design of actual motor control system.

Keywords: brushless DC motors; BLDCM control; modelling; simulation; Simulink; motor control; mathematical modelling; rotor speed; torque.

DOI: 10.1504/IJMIC.2009.027887

International Journal of Modelling, Identification and Control, 2009 Vol.7 No.4, pp.346 - 350

Published online: 14 Aug 2009 *

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