Development of current by-pass circuit of series connection current drive device

This paper has proposed a self-turn-on type current by-pass circuit which is a new circuit method. The main circuit current can continuously flow in this circuit, even if several of the current drive devices connected in series are open due to breakdowns. The composition, operation, and the circuit design method of the proposed circuit have been described in detail. Moreover, the method of constructing a simulation model of the fuse, which is an element of the circuit, was described. Moreover, the proposed circuit was simulated using that fuse model, the circuit constant was set, and the circuit operation was confirmed. As a result, a circuit that operated without increasing the MOSFET loss was achieved. Moreover, the proposed circuit was constructed for trial purposes, and a current by-pass examination when the diode was opened was executed. As a result, it was proven to be able to pass a current of 60 A continuously even when the diode was open.