A Study of Cogging Torque Reduction Methods in Brushless DC Motor

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Published: Jul 15, 2012
DOI: https://doi.org/10.37936/ecti-eec.2012102.170377
Keywords:
Brushless DC Motor Finite-Element Method Magnetic Cogging Torque

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Teeradej Srisiriwanna
Department of Electrical Engineering, Faculty of Engineering,King Mongkut’s University of Technology Thonburi
Mongkol Konghirun
Department of Electrical Engineering, Faculty of Engineering,King Mongkut’s University of Technology Thonburi

Abstract

The cogging torque is undesirable effect in the brushless dc (BLDC) motor, causing vibration and audible noises. It arises from the rotor permanent magnet interacting with the steel teeth on the stator. This paper studies the various reduction methods of cogging torque when designing a BLDC motor. These methods can be categorized according to three parts of motor structure, i.e., air gap length, rotor and stator parts. The finite element method magnetic (FEMM) is primarily used to analyze the cogging torque among these different reduction methods. In this paper, a 4-pole, 24-slot BLDC motor is focused with variations of air gap length, rotor, and stator parts in order to study its cogging torque reductions. Finally, the FEMM simulation results are presented to validate these reduction methods.

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How to Cite
Srisiriwanna, T., & Konghirun, M. (2012). A Study of Cogging Torque Reduction Methods in Brushless DC Motor. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 10(2), 146–152. https://doi.org/10.37936/ecti-eec.2012102.170377
Issue
Vol. 10 No. 2 (2012): Regular Issue
Section
Electrical Power Systems

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References

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[5] David Meeker,“Finite Element Method Magnetics." User’s Manual: Oct 16, 2010.

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