FLUX DISTRIBUTION OF PASSIVE FAULT CURRENT LIMITER BASED ON SATURABLECORE AND PERMANENT-MAGNET

From the point of view concerned with the development of the informati on-oriented functions in social activities, recently power consumption has rapidly increased. On the other hand, ability of power supply has not been increased to follow this increasing consumption, because it is difficult to construct new power generation plants. Therefore, rese rve capacity of power supply is going to be decreased and power down h as become a serious problem. To prevent the serious power down and to maintain a stable power supply, we had already proposed a passive faul t current limiter using a permanent magnet with high coercive force, h igh remanent magnetic flux density and a ferrite core with high permea bility, low saturated flux density compared to that of a permanent mag net. In this paper, the flux distribution of the limiter is investigat ed using the three dimensional finite element method.