Design and Analysis of a High-Efficiency Low-Cogging BLDC Motor for Medium-Power Applications

M. Rababa, W-I. Wu and P.R. Selvaganapathy

cite as : M. Rababa, W-I. Wu and P.R. Selvaganapathy,(2019),Design and Analysis of a High-Efficiency Low-Cogging BLDC Motor for Medium-Power Applications, Allertonpress, Vol48,pp266

Abstract

This study presents the design and analysis of a high-efficiency brushless direct current (BLDC) motor optimized for performance in medium-power applications. The motor operates at a supply voltage of 72 V and a rated speed of 3600 RPM, delivering consistent performance with a rated current of 10 A. A 36-slot, 20-pole configuration was selected to ensure smooth operation and minimize torque ripple, supported by a surface-mounted NdFeB magnet rotor and M-19 laminated stator and rotor cores. The design achieved a cogging torque of less than 0.3 N·m, representing less than 2% of the motor’s continuous torque—ideal for applications requiring high stability and minimal vibration. Flux linkage analysis, magnetic material selection, and mechanical loss control were used to enhance electromagnetic and thermal performance. The results confirm that the design balances torque density, speed, and smoothness effectively for industrial and vehicular use.

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References

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