A Novel Method for Commutation Torque Ripple Reduction of Four-Switch, Three-Phase Brushless DC Motor Drive

AuthorsA. Halvaei Niasar, A. Vahedi, H. Moghbelli
JournalIranian Journal of Electrical and Electronics Engineering (IJEEE)
Page number83-97
Serial number3
Volume number3
Paper TypeFull Paper
Published AtJuly 2007
Journal GradeScientific - research
Journal TypeTypographic
Journal CountryIran, Islamic Republic Of
Journal IndexSCOPUS, ISC

Abstract

This paper presents an original study on the generated torque ripples of phase commutation in the Four-Switch, Three-Phase Inverter (FSTPI) Brushless DC (BLDC) motor drive which is suitable for low cost applications. Analytic values of torque ripple and commutation duration are obtained for different operation conditions. Moreover, limitation on the speed range operation caused from splitting of the DC-link voltage is shown exactly.  Then a novel current control technique is developed to minimize the commutation torque ripple for a wide speed range. The technique proposed here is based on a strategy that the current slopes of the rising and the decaying phases during the commutation intervals can be equalized by proper duty-ratios at commutations. Finally, the validity of the proposed analysis and developed torque ripple reduction technique are verified via simulation.

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tags: Brushless DC Motor,Four-Switch Inverter,Commutation Torque Ripple