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

Volume

1

fYear

2002

fDate

2002

Firstpage

33

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE

Conference_Location

Dallas, TX

Print_ISBN

0-7803-7404-5

Type

conf

DOI

10.1109/APEC.2002.989224

Filename

989224