The Design of New Sensorless BLDCM Control System for Electric Vehicle

Zhibin Ren, Xiping Liu
2010 Energy and Power Engineering  
In order to meet the requirement of reliably running which is by Electric Vehicle for motor controller, the paper is focused on a sensorless brushless DC motor controller design and a commutation point method. By utilizing the saturation effect of stator iron core, six short voltage pulses are employed to estimate the initial rotor position. After that a series of voltage pulses are used to accelerate the motor. When the motor reaches a certain speed at which the back-electromotive force (EMF)
more » ... ethod can be applied, the running state of the motor is smoothly switched at the moment determined by the relationship between the terminal voltage waveform and the commutation phases. "Lagging 90˚-α commutation" is bring forward to overcome the shortages existing in the traditional method. The experimental results verify the feasibility and validity of the proposed method.
doi:10.4236/epe.2010.23031 fatcat:ywuqurg7zbdx7h4yokgufzwbai