Open AccessFault‐tolerant control of DSBLDC motor drive under open‐circuit faults
Author(s) -
Zhang Jian,
Zhang Zhuoran,
Yu Li,
Bian Zhangming
Publication year - 2019
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2018.5240
Subject(s) - control theory (sociology) , pulse width modulation , counter electromotive force , torque ripple , fault tolerance , ripple , rotor (electric) , fault (geology) , torque , power (physics) , computer science , dc motor , engineering , induction motor , current (fluid) , direct torque control , control (management) , voltage , electrical engineering , physics , distributed computing , quantum mechanics , artificial intelligence , seismology , geology , thermodynamics
Doubly salient brushless dc (DSBLDC) motor drive system has attracted increasing attention due to the rugged rotor structure, brushless operation and low cost. The switch open‐circuit (OC) fault increases the torque ripple and decreases the maximal output power of DSBLDC motor drive system. A fault‐tolerance control strategy for switch OC circuit is proposed in this study. The back electromotive force (BEMF) current would occur in a pulse‐width modulation (PWM) pattern. It severely degrades the proposed method's fault‐tolerant performance. So the cause of the BEMF current is analysed and BEMF current is suppressed by specific PWM pattern. Finally, the fault‐tolerance control strategy is verified by experiment results and the selection PWM pattern is proved to be correct and practical.