In this research, we investigate magnetic material properties by using numerical analysis taking into account the power semiconductor properties in an inverter circuit. To consider magnetic properties, we use play model and Cauer's equivalent circuit theory for depicting magnetic hysteresis. To consider power semiconductor properties, an inverter circuit analysis taking into account the on-voltage characteristics of a semiconductor is carried out. As a result, on the basis of the numerical analysis, minor loops caused by the on-voltage can be depicted properly and the analyzed iron losses of the magnetic material can almost reproduce the experimental results.