Analytical design of permanent magnet traction drive motors

This paper presents an analytical design of permanent magnet (PM) traction drive motors with emphasis on calculation of the volume and sizes of PM material. A set of formulae are presented to properly size the magnets without the high effort of finite element analysis (FEA). These formulae not only give optimized magnet sizes, but also provide quick solutions for the preliminary designs. The method can be used in the initial design stage to set up the base for FEA and optimization, as well as throughout the entire design and optimization process to verify the PM motor design. Numerical methods and experiments validated the proposed method.