Optimal rotor construction of synchronous motor with pluralpermanent magnets per pole

摘要

In this paper, the authors propose a new type of rotorconstruction for the permanent magnet synchronous motor. By using pluralpermanent magnets for one-pole of the rotor, it is possible not only toreduce the space harmonics of air-gap fields but also to provide spacefor damper windings in the inter-pole space. The dimensions of theplural permanent magnets are derived by Fourier analysis. Based onnumerical investigations, the authors propose an optimal rotorconstruction in view of both the reduction of space harmonics and thedamping effect