Influences of PWM mode on the current generated by BEMF of switch-off phase in control system of BLDC motor

Author

Zhang Xiangjun ; Boshi, Chen

Author_Institution

Shanghai Univ., China

Volume

1

fYear

2001

fDate

2001

Firstpage

579

Abstract

In the control system of brushless DC (BLDC) motors, different PWM modes have different influences on the pulsating current generated by the BEMF (back electromotive force) of the switch-off phase, which may produce commutation error in the commutation control and reduce the reliability and the stability of the control system. This paper analyzes the generating theory of BEMF current and selects the best PWM mode to minimize its influence on the commutation control in five given types. Simulation and experimental results prove that the selection is correct and practical

Keywords

DC-AC power convertors; PWM invertors; brushless DC motors; commutation; control systems; machine control; machine testing; machine theory; switching; PWM mode effects; back EMF; brushless DC motors; commutation error; control system; reliability; stability; switch-off phase; Brushless DC motors; Brushless motors; Commutation; Control systems; DC generators; DC motors; Error correction; Force control; Pulse width modulation; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on

Conference_Location

Shenyang

Print_ISBN

7-5062-5115-9

Type

conf

DOI

10.1109/ICEMS.2001.970742

Filename

970742