Experimental data of induction motor are shown in the condition of no load and loaded. In no load condition,since most of induced eddy current do not drift in the rotor bar, most of the motor loss increment is considered to be iron loss. In loaded condition, since larger eddy current drifts in the rotor bar, the motor loss increment
included the copper loss.
In the comparison motor characteristics between PWM inverter and sinusoidal wave source, their fundamental wave ingredient of the inverter output line voltage became the same.