Design and Analysis of Core Reactor Based on Magnetic Powder Material

In order to solve the problem of noise and hot spot caused by air gap in traditional silicon steel reactor, a series reactor is designed using Fe-Si core material with low permeability. The magnetic properties of Fe-Si material with a magnetic permeability of 60 and the design method of Fe-Si reactor are given. The magnetic field, thermal field, vibration and noise characteristics of Fe-Si series reactor and traditional silicon steel reactor are analyzed by three-dimensional finite element method. The comparison results show that the reactance value of Fe-Si series reactor has a certain attenuation, the winding temperature is slightly lower, the core temperature is higher, and the noise is obviously reduced. A prototype of Fe-Si series reactor is made. The experimental results are in good agreement with the calculated results, which proves the feasibility of using low permeability Fe-Si power material to develop power frequency reactor for power system.