Introduction to Permanent Magnet AC Machine Design

This chapter talks about the design of a permanent magnet AC (PMAC) machine. The machine design problem is posed as a formal mathematical optimization problem. An important of operating characteristic of PMAC machines is the inverter, which is discussed at a level sufficient for design purposes. The PMAC machine geometry is explained and includes a cross-section diagram of the machine. A section talks about stator winding, followed by another one on material parameters including material selection. The chapter illustrates the calculation of stator currents. Taking the rotor position to be fixed, the chapter demonstrates how to perform a radial field analysis of the machine. A procedure is illustrated to calculate the parameters of the lumped parameter model of the machine. Ferromagnetic field analysis involves the determination of the flux density waveforms in the ferromagnetic portions of the machine. Finally, a case study on machine design is presented.