Minimization of Torque Ripples in Brushless DC Motors

ÇORAPSIZ M. R., KAHVECİ H.

3rd International Conference on Advanced Engineering Technologies, Bayburt, Turkey, 19 - 21 September 2019, pp.366-373 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/cac.2018.8623084
  • City: Bayburt
  • Country: Turkey
  • Page Numbers: pp.366-373
  • Keywords: Brushless DC Motor (BLDCM), Vector Control, Commutation Torque Ripple, Optimal Current Drive, COMMUTATION, DRIVES
  • Karadeniz Technical University Affiliated: Yes

Abstract

Brushless DC Motor (BLDCM) inevitably suffers from commutation torque ripple due to stator inductance and the finite dc-link voltage, which may degrade the torque performance. This paper analyzes the commutation torque ripple under traditional two phase on operation in vector coordinate system. Based on the analysis, this paper presents a novel drive method of BLDCM with vector control to minimize commutation torque ripple. In this method, the optimal current vector can be obtained by calculating constraint equation of both torque ripple minimization and maximum torque per ampere characteristic (MTPA), which avoids control method switch between normal conduction period and commutation period and improves system reliability. Simulation and experimental results for a 3.7kW BLDCM are presented to validate the proposed method.