scholarly journals Improved PWM-OFF-PWM to Reduce Commutation Torque Ripple of Brushless DC Motor Under Braking Conditions

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 204020-204030
Author(s):  
Qixun Zhou ◽  
Jianhua Shu ◽  
Ziwei Cai ◽  
Quanlong Liu ◽  
Guanghui Du
IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 138721-138731 ◽  
Author(s):  
Xuliang Yao ◽  
Jicheng Zhao ◽  
Jingfang Wang ◽  
Shengqi Huang ◽  
Yishu Jiang

Author(s):  
M. Senthil Raja ◽  
B. Geethalakshmi

Brushless dc motor still suffers from commutation torque ripple, which primarily depends on transient line current in the commutation interval. In order to control the incoming and outgoing phase currents to change at the same rate during commutation, this paper presents a novel high boost ratio DC-DC circuit topology in the front end of the inverter. With a suitable closed loop control scheme, the proposed high boost ratio DC-DC converter is operated with two different duty ratios one during commutation period and the other during non commutation period. The cause of commutation ripple is analyzed, and the way to adjust the duty ratio for obtaining the desired dc link voltage is introduced in detail. Finally, simulation and experimental results show that, compared with the existing dc–dc converter topologies, the proposed method can obtain the desired voltage much faster and minimize commutation torque ripple more efficiently


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