DocumentCode :
27267
Title :
Approach for torque ripple reduction for brushless DC motor based on three-level neutral-point-clamped inverter with DC–DC converter
Author :
Viswanathan, V. ; Jeevananthan, S.
Author_Institution :
Dept. of Electr. & Electron. Eng., Jawaharlal Nehru Technol. Univ., Hyderabad, India
Volume :
8
Issue :
1
fYear :
2015
fDate :
1 2015
Firstpage :
47
Lastpage :
55
Abstract :
This study proposes a novel topology for reducing commutation torque ripple in a brushless DC motor (BLDCM) drive system using a three-level neutral-point-clamped (NPC) inverter combined with single-ended primary-inductor converter (SEPIC) converters. In the BLDCM, current ripples arise because of the influence of stator winding inductance, which generates torque ripples. The torque ripple that is generated in the commutation period prevents the use of BLDCM in high-precision servo drive systems. In this study, two-stage converters are proposed to reduce the torque ripple. The first stage consists of two SEPIC converters to obtain the desired commutation voltage according to motor speed. A dc-link voltage selection circuit is combined with the SEPIC converters to apply the optimised voltage during the commutation interval. To reduce the torque ripple further, a three-level NPC inverter is used to apply a half dc-link voltage across the motor winding and this effectively reduces the torque ripple. Experimental results show that the proposed topology is able to reduce commutation torque ripple significantly under both low-speed and high-speed operation.
Keywords :
DC motor drives; DC-DC power convertors; brushless DC motors; commutation; invertors; servomotors; stators; BLDCM drive system; DC-DC converter; SEPIC; brushless DC motor; commutation interval; commutation torque ripple reduction; commutation voltage; dc-link voltage selection circuit; high-precision servo drive systems; motor winding; single-ended primary-inductor converter; stator winding inductance; three-level NPC inverter; three-level neutral-point-clamped inverter; two-stage converters;
fLanguage :
English
Journal_Title :
Power Electronics, IET
Publisher :
iet
ISSN :
1755-4535
Type :
jour
DOI :
10.1049/iet-pel.2013.0471
Filename :
7014452
Link To Document :
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