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Improved Control of BLDCM Considering Commutation Torque Ripple and Commutation Time in Full Speed Range

Authors :
Yuming Liao
Jinping Wang
Yifan Xie
Weidong Jiang
Peixia Wang
Source :
IEEE Transactions on Power Electronics. 33:4249-4260
Publication Year :
2018
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2018.

Abstract

The three phases of brushless dc motor (BLDCM) are involved in energy conversion during the commutation interval. A novel commutation analysis method of the BLDCM based on coordinate transformation theory is proposed in this paper, though this coordinate transformation theory is popular in the control of three-phase sinusoidal motors, such as induction motors and permanent magnet synchronous motors. The method is intuitive and easy to understand compared with the method based on circuit solving. Combined with the voltage vector diagram of the inverter, commutation control to reduce commutation torque ripple under low speed (LS_RCTR) and high speed (HS_RCTR) is deduced. However, under a heavy load and high-speed condition, long commutation time may result in commutation failure if these commutation controls to RCTR is adopted. To avoid that, commutation time must be controlled. Then, commutation control to reduce commutation time under low-speed (LS_RCT) and high-speed (two cases, named HS_RCT1 and HS_RCT2) are proposed. The improved control of BLDCM presented in this paper can coordinate commutation torque ripple and commutation time in full speed range. Finally, the feasibility and effectiveness of these methods are verified by experiment.

Details

ISSN :
19410107 and 08858993
Volume :
33
Database :
OpenAIRE
Journal :
IEEE Transactions on Power Electronics
Accession number :
edsair.doi...........61634d92f9709faeaabca047e5343a49
Full Text :
https://doi.org/10.1109/tpel.2017.2717484