Abstract
To improve the core loss of MnZn ferrite at high frequencies,the loss characteristics were investigated. For a core with fine grains sintered at a low temperature, high density was obtained and the rapid increase in the loss factor at high frequencies was reduced. Numerical analysis was performed to divide the core loss into the hysteresis loss,the eddy current loss, the dielectric loss, and the residual loss. The residual loss was dominant at higher frequencies and decreased more for the core with a smaller grain size.
