where Ui1 is the induced voltage at the primary coil for magnetic flux h , Rz is the resistance representing the losses of the ferromagnetic material and ω is the angular frequency. The induced voltage Ui1 can be expressed as
where Ui1 is the induced voltage at the primary coil formagnetic flux h , Rz is the resistance representing the lossesof the ferromagnetic material and ω is the angular frequency.The induced voltage Ui1 can be expressed as