Dynamic Simulation of Brushless DC Motor Drives Considering Phase Commutation for Automotive Applications

This paper proposes the advanced model of brushless dc motor drives considered behaviour of commutation and waveform of back-EMF for dynamic simulation of automotive application under Matlab/Simulink environment. We need a model of BLDC motor drives that control algorithm and BLDC motor drive system can be designed and simulated as a point of system level. The model has to consider commutation phenomenon. A waveform of back-EMF of BLDC motor can be modified to depend on BLDC motor type. To satisfy above factors need a co-simulation technique with other circuit level simulation tools. However, there are severe constraints, i. e. simulation speed and interface with tools. The advanced model proposed in this paper considers behaviour of commutation and waveform of back-EMF for comprehensive analysis and prediction of dynamic characteristics of BLDC motor drives. The commutation phenomenon is implemented by functional behaviour description and back-EMF is modelled by pattern of waveform. The developed model is split into few parts with object-oriented manner for reusability and scalability. It is easily integrated with other models of automotive application.