The Portable Measurement Instrument of Dynamic Magnetic Properties for the Soft Magnetic Materials

The portable measurement instrument is designed and built to measure the dynamic magnetic properties of the soft magnetic materials. The measurement principle and sampling method are presented. The study shows the instrument can measure the different types of soft materials accurately at frequencies in the range of 20 Hz – 200 kHz. The standard deviations of the specific total loss (Ps) and amplitude permeability (μa) are less than 0.3%. The errors ofPsanduaare not larger than 0.3% between the measurement results of the instrument and the standard measurement device of National Institute of Metrology (NIM) of China NIM.