A DEVICE FOR MEASURING THE MAGNETIC-PROPERTIES OF RING SPECIMENS AT HIGH-FREQUENCIES

A device for measuring the magnetic properties of ring specimens, such as the peak magnetic field, peak induction, saturation induction, rem anence, coercive force and power loss in the frequency range up to 150 kHz is described. In addition to these values, the time domain and fr equency domain signals and the hysteresis loop can be obtained. The va lues are determined from the signals of the primary and secondary wind ings of the ring specimen used as a transformer core. The device consi sts of a digital part which generates the exciting signal form, contro ls the measurement and performs the sampling of the measured signals, and an analog part that is used to amplify, attenuate and low pass fil ter the signals from the ring specimen. A computer is used for further processing and displaying the data achieved. The results given in thi s paper show that the measurements with this equipment are highly reli able.