Magnetic Testing Apparatus for Determination of Magnetic Properties of Si-steel Sheet 3'×6' or 2.5'×6'

Abstract

An apparatus, which is a combination of two magnetic testing apparatus, one of which has a compensating coil for the determination of magnetic properties of Si-steel 3'×6' and another with the same coil for Si-steel 2.5'×10', was designed and manufactured according to the previous report the writers made (cf. Bull. Electrotech. Lab. 19.357 (1955)). The construction of the magnetic testing apparatus and the measuring method of the iron loss are fully described in this paper. With this apparatus, the magnetization curve is obtained with about 2% accuracy by using magnetic induction up to 15, 000 Gauss and commercial frequency, while the iron loss is determined with about 3% accuracy by using the same induction up to 13, 000 Gauss and the same frequency.