Development of a high speed motor using amorphous metal cores

This paper presents the development of a 10 kr/min motor that utilizes the amorphous toroidal core. This motor employs a non-slotted axial gap structure with two ferrite magnet rotors and one amorphous toroidal stator. The goal of the motor is to produce a 400 W output, at 90% high efficiency with a size of ΦK1030. The low core loss design is employed to decrease the large core losses produced by a high frequency field. The motor design equations and three dimensional finite element analysis (3D FEA calculations) are presented. A prototype machine was manufactured. The structure of the prototype and the test results are presented in this paper.