Background: In this paper, a two-pole 3 kW three-phase induction motor is taken as an
example to establish a two-dimensional finite element model. The correctness of the model is verified
by comparing the finite element calculation data with the experimental data.
Methods: On this basis, the influence of electromagnetic characteristics of different shell materials
on the motor yoke saturation degree, loss, current and power factor are studied, it is determined
that the motor yoke saturation degree is the key factor affecting the power factor, current and loss
of the motor. The influence of different stator yoke thickness on the saturation degree of motor stator
yoke with the same shell material is further studied. The influences of motor stator yoke saturation
degree on motor current, loss and power factor are obtained when the stator yoke thickness is
Results: The optimum range of motor current, loss and power factor is obtained.
Conclusion: Finally, by comparing the different shell materials to optimize the motor structure size, it
is determined that the motor stator yoke thickness can be reduced by using cast iron shell, and the motor
materials consumption can be saved to provide reference for motor optimization design.