Simulation of sensorless permanent magnetic brushless DC motor control system

This paper presents a simulation method of modularization design for brushless DC motors (BLDCM). Based on the mathematical model of BLDCM, some isolated functional blocks, including BLDCM body block, speed PI controller block, current hysteresis controller block, current reference block, inverter block and commutation logic block, have been modeled 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.These instructions give you the basic guidelines for preparing papers for IEEE 2008 ICAL conference proceedings.