Title :
A novel direct back EMF detection for sensorless brushless DC (BLDC) motor drives
Author :
Shao, Jianwen ; Nolan, Dennis ; Hopkins, Thomas
Author_Institution :
Power Syst. Applications Lab., STMicroelectronics, Schaumburg, IL, USA
Abstract :
A novel back EMF detection method for sensorless BLDC motor drives without the motor neutral point voltage information is presented in this paper. The true phase back EMF signal can be directly obtained from the motor terminal voltage by properly choosing the PWM and sensing strategy. As a result, the method proposed is not sensitive to switching noise, no filtering is required, and good motor performance is achieved over a wide speed range. The detailed circuit model is analyzed and experimental results verify the analysis and demonstrate advantages of the new technique
Keywords :
DC motor drives; PWM invertors; brushless DC motors; machine control; voltage measurement; PWM strategy; direct back EMF detection; inverters; motor neutral point voltage information; motor terminal voltage; phase back EMF signal; sensing strategy; sensorless brushless DC motor drives; Brushless DC motors; Brushless motors; Circuit noise; Commutation; DC motors; Filtering; Motor drives; Pulse width modulation; Pulse width modulation inverters; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989224
