A comprehensive design 12–8 Salient-Pole Homopolar brushless dc motor

This paper presents the comprehensive geometric parameters design of a Homopolar Double Salient-Pole brushless dc motor. The under consideration configuration is designed based on having double layers of the stator/rotor and a stationary field assisted coil placed between them. The design methodology employed enabled a swift initial design of the lamination geometric parameters such as air-gap length, rotor pole arc length, stator pole arc length, number of winding turns per pole and the determination of the dc coil turns, maximum dc flux and minimum dc coil area. To evaluate the machine performance, the numerical technique has been utilized. In the numerical analysis, 3-D Finite Element (FE) analysis has been carried out using a MagNet CAD package (Infolytica Corporation Ltd.), for a three-phase 12-8 and 1.5-kW Double Salient-Pole Homopolar BLDC motor as a design example to support the efficacy of the proposed design procedure.