Patent ID: 8436581

Claim:
A system for testing electromagnetic characteristics of an electromagnetic steel sheet, the electromagnetic steel sheet being wound with a first winding and a second winding therearound, said system comprising: a control unit operable so as to output a non-sinusoidal wave control signal; a driving unit receiving the non-sinusoidal wave control signal from said control unit and a floating voltage, and operable based on the non-sinusoidal wave control signal and the floating voltage received thereby so as to output a control output; a power unit operable so as to output a DC voltage; a power output unit coupled to said power unit and said driving unit for receiving the DC voltage and the control output therefrom, and having an output side adapted to be coupled across the first winding, said power output unit being operable based on the control output and the DC voltage received thereby so as to output a voltage output at said output side such that an exciting current flowing through the first winding is generated in response to the voltage output at said output side of said power output unit, thereby resulting in an induced voltage across the second winding; and a measuring unit coupled to said control unit, adapted for measuring the exciting current flowing through the first winding and the induced voltage across the second winding, and outputting to said control unit an output corresponding to the exciting current and the induced voltage based on measurement results such that said control unit is operable based on the output from said measuring unit to obtain the electromagnetic characteristics of the electromagnetic steel sheet.