哈尔滨工业大学学报（英文版）2010，Vol.17Issue(4)：461-466,6.
Study of direct back EMF detection for sensorless brushless DC motor
Study of direct back EMF detection for sensorless brushless DC motor
摘要
Abstract
In this paper,a new rotor position detecting method for the sensorless control of brushless DC motor(BLDCM)is introduced.It obtains the phase back EMF signal from the motor terminal voltage by properly choosing the PWM and sensing strategy directly and needn' t the motor neutral point voltage information.The paper analyzes both the steady-state of PWM on the high side modulator mode which doesnt consider the parasitic capacitance Coes in the switches and the transient-state of PWM on the high side modulator mode which considers the parasitic capacitance Coes in the switches in detail.The experimental results verify that the proposed method is not sensitive to switching noise,no filtering is required,and good motor performance is achieved within a wide speed range.关键词
BLDCM/sensorless/Back EMF/PWMKey words
BLDCM/sensorless/Back EMF/PWM分类
信息技术与安全科学引用本文复制引用
ZOU Ji-bin,JIANG Shan-lin,LIANG Wei-yan..Study of direct back EMF detection for sensorless brushless DC motor[J].哈尔滨工业大学学报（英文版）,2010,17(4):461-466,6.基金项目
Sponsored by the National High Technology Research and Development Program of China(863 Program)(Grant No.2007 AA09Z214). （863 Program）
