Loss characteristics of silicon steel at 60 cycles with D-C excitation

CORE-LOSS and excitation characteristics of sheet steel subjected to combined alternating and direct magnetic fields, have been subjects of investigation for the past 20 years. Such combined fields occur in many types of electrical apparatus. This paper presents the results of a series of 60-cycle core-loss and excitation tests with superposed d-c excitation, which recently were made on silicon sheet steel.