Study on Control Method of Magnetic Flux Density Waveform in AC Magnetic Measurement

摘要

To estimate the magnetic properties of the magnetic material, magnetic flux density waveform (B waveform) must be sinusoidal wave. However, it is necessary to control the exciting waveform in consideration of the distortion, because voltage waveform induced by B-coil is distorted due to the magnetic properties. As a result, the Improved Back Calculation Method can make B waveform sinusoidal wave with the least number of feedbacks than any control method. Because the Improved Back Calculation Method performs noise cancelling for measured waveform and make accurate exciting waveform from measured waveform.