Electrical and mechanical design of a PM traction motor with tooth coils

The design process for a permanent magnet (PM) AC traction motor is analyzed here taking both electromagnetic design and mechanical design aspects into account. The traction motor was designed for tooth coil windings. It has embedded permanent magnets for easy manufacture and to satisfy electromagnetic performance requirements. Key mechanical design aspects are introduced, and the most important force characteristics are pointed out. The project culminated with the design, build, and test of a prototype machine, and significant performance measurements are reported here.