Magnetic Properties Measurement and Loss Modeling of Nanocrystalline Cores with Different Stack Thicknesses

Nanocrystalline materials are often used to make cores for high-frequency transformers and reactors. It is important to reduce core loss for their reliable operation. In this paper, the loss of nanocrystalline core with different stack thicknesses at different frequencies is measured. The hysteresis loss and dynamic loss are obtained by the loss separation model, and the variation of two losses with stack thickness and frequency is shown. A modified loss separation model related to the stack thickness is obtained. The calculated loss obtained from the loss model show great agreement with the measured results. This loss model would be helpful for the design and manufacture of high frequency transformers and reactor cores.