High-frequency iron losses

Data are presented giving the iron losses for five-mil, 4 per cent silicon steel sheet for a range of frequencies from 5000 to 50,000 cycles per second. An approximate separation of hysteresis and eddy current losses is made showing the result of skin effect on these losses. A method of test is described which if desired could be used over a much wider range of frequencies than those indicated. The source of high-frequency supply was a new type of arc oscillator. The probable accuracy of the results and the possible sources of error are discussed.