Masato Mino’s scientific contributions

This paper describes fuse blowing characteristics for high voltage direct current (HVDC) power supply systems. We simulated the difference of the voltage and current waveforms between 380 V (HVDC) and 48 V (conventional) using a new fuse model and derived the fuse blowing characteristics that are required for HVDC. We calculated the relationship between the maximum voltage and arcing time and connected the fuse model parameters to the physical parameters. From the results, we devised a technique for making a good fuse that balances arcing time and maximum voltage. Moreover, we calculated the effect of the voltage fluctuations due to a fuse blowing in an HVDC power supply system. To have smaller voltage fluctuations, not only must the fuse be good but the system must be appropriate. We propose design points that will decrease voltage fluctuation in the system. They will lead to add safety and maintain the high efficiency of HVDC power supply systems.