Title: Critical evaluation of cogging torque in BLDC motor with various techniques

Authors: M. Arun Noyal Doss; S. Jeevananthan; Subhransu Sekhar Dash; M. Jahir Hussain

Addresses: Department of Electrical Engineering, SRM University, Chennai-603203, India ' Department of Electrical Engineering, Pondicherry Engineering College, Puducherry-605014, India ' Department of Electrical Engineering, SRM University, Chennai-603203, India ' Department of Electrical Engineering, SRM University, Chennai-603203, India

Abstract: This paper highlights the consequences of cogging torque in PMBLDC motor which results in direct impact on the performance of the motor. This research paper proposes various techniques for reducing the cogging torque such as magnet pole design, asymmetric magnets, auxiliary groove, skewing and slot less. The geometrical and theoretical analysis calculations can be verified by 2-D finite element analysis. The designed model obtained in this paper enhances the design of BLDC motors for best performance.

Keywords: PMBLDC motors; permanent magnet BLDC motors; brushless DC motors; cogging torque; 2D FEA; finite element analysis; magnet pole design; asymmetric magnets; auxiliary groove; skewing; slotless; modelling; motor design.

DOI: 10.1504/IJAAC.2013.057042

International Journal of Automation and Control, 2013 Vol.7 No.3, pp.135 - 146

Received: 09 Jan 2013
Accepted: 02 Jun 2013
Published online: 12 Jul 2014 *

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