Abstract:
Thanks to its unique properties, such as isotropic
magnetic and thermal properties and low eddy current loss,
the soft magnetic composite (SMC) material is suitable for
application in electrical machines, especially those with
complex structures and three-dimensional (3D) magnetic
fluxes. This paper presents the performance analysis of a
three-stack permanent magnet (PM) claw pole motor with
an SMC stator core. 3D tinite element magnetic analysis and
improved formulations are applied to accurately compute
the motor parameters, such as the back electromotive force,
incremental inductance, cogging torque, and core loss. An
equivalent electrical circuit is derived to predict the motor's
steady-state performance under a brushless DC control
scheme. Because of the large winding inductance of this type
of motors, the control of the output torque and speed can be
difficult To verify the motor controllability, a
Matlab/Simulink-based simulation model is compiled to
simulate the motor dynamic and steady-state performances.
Experiments are conducted on the motor prototype,
validating the theoretical computations and analyses.
