Practical and Rapid Motor Sizing Technique Using Existing Electrical Motor

Abstract

Electrical motor design requires considerable work and resources. In the field, motor designers need to decide on competitive motor sizing quickly to compete with other motor suppliers. Generally, expensive FEM S/W is required to obtain accurate motor sizing results, but buying and maintaining many licenses is costly. Moreover, patience is required to obtain the results from FEM analysis. In this paper, a motor sizing technique using an existing production motor is presented to enable responding to urgent requests from customers without using FEM analysis. In order to enhance the fidelity of the results, magnetic flux losses due to magnet coatings and non-linear characteristics are considered during the motor sizing process. The proposed sizing method is verified via a comparison with FEM analysis and the test results and shows reasonable performance. Also, this method has the substantial advantage of outputting accurate results instantly. The method can help with the modification design of electrical motors without using expensive FEM S/W and does not require a certain level of skill or experience.

Keywords

• permanent magnet synchronous motor (PMSM)
• motor sizing
• finite element method (FEM)
• electric power steering motor (EPS motor)
• magnetic flux loss
• parameter