Abstract:
Soft magnetic composite (SMC) materials are particularly suitable for application in
electrical machines with complex structures, 3D magnetic flux paths, and high operating
frequencies, because of their unique properties. This paper presents the design of a 2 kW high
speed (30 krpm) three stack claw pole motor with SMC core. Three-dimensional finite element
analysis of magnetic field is conducted for parameter calculation and dimension optimisation.
Considering the importance of core loss for the design of high speed motors, rotational core loss
model is employed in this paper. Practical methods considering the alternating magnetic filed
only are also presented, which are useful to designers who do not have rotational core loss data.
