A comprehensive procedure for an optimum design of the Brushless DC motors based on weighted functions

Abstract

In this paper, a comprehensive design procedure for the Brushless DC (BLDC) motors is proposed and the governing equations are derived from the motor flux linkage and are utilized in the flowchart presented for the BLDC motor design. The proposed algorithm is based on the weighted target functions optimization. This algorithm is developed for a surface-mounted permanent-magnet inner-rotor 2pole-3slot pattern BLCD motor. A 120 watt 8pole-12slot 4000 rpm BLDC motor is designed by means of the flowchart as a case study. The resulted parameters from the flowchart are used to make the 3-D model analysed by finite element analysis (FEA). Then, FEA results are compared with the flowchart results to verify the proposed design algorithm. Output parameters of a fabricated BLDC motor having the same physical properties are measured and presented to show the applicability of the algorithm.

Keywords

BLDC motor design optimization finite element analysis weighted functions

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