The cross frequency is the frequency where the loss of
both motor is same value. The cross frequency decreases
from 194 Hz to 104 Hz by eliminating harmonics. And
the losses of both motors are almost same below 104 Hz.
Frequency dependence of the loss is same as Figure 3.
The loss of SMC motor is almost proportional to the
frequency, but the loss of laminated motor is proportional
to the square of the frequency. The result expresses that
the major loss of SMC motor is hysteresis loss by the
fundamental component. And loss of laminated motor
contains eddy current loss. Another comparison is shown
in Fig.7.