Analysis of electromagnetic force distribution on end winding for motor reliance

The design of electrical rotating machine is required to have high capacity and electrical loading without comparable increase in size. In this paper, we looked into the electromagnetic force of end winding part of electrical motor by using 3D finite element method to analyze distribution of end winding forces more exactly. And we also performed stress analysis of end windings by using the force distribution calculated by 3D electromagnetic field FEM. Finally, the design of support ring surrounding end windings and preventing the insulation fault is presented by comparing the stress distribution of supporting ring with the yield stress of ring material.