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In DC power supply system, a fast response circuit breaker is required. Semiconductor DC circuit breaker is an important key technology in DC power supply system. This paper considers the malfunction issue of Silicon Carbide-Static Induction Transistor (SiC-SIT) based DC circuit breaker in DC power supply system. The malfunction mechanism is explained, and a solution methodology proposed. Investigations...
This paper proposes a novel DC-DC converter where both the forward and the flyback actions are mixed. This novel converter has some prominent features of the voltage reduction for the main switch, the current-ripple reduction of output inductor, the size reduction, and the power loss reduction. This converter is named "Forward-Flyback-Mixed converter" and is abbreviated as "FFB converter...
Based on the conventional forward converter, the transformer's magnetizing inductance is made small, and a reset winding of the transformer is moved to the secondary side, and furthermore, the anode terminal of the freewheeling diode is connected at a different point. Then a novel topology of DC-DC converter is proposed, and its power efficiency is predicted to be improved. This converter has both...
In boost and buck-boost converters, an unstable phenomenon occurs and the output voltage oscillates when the feedback gain is high and the load becomes heavy. On the other hand, even when the feedback gain is relatively low, another instability arises under some conditions of load resistance, and then the dc output voltage jumps down to an extremely low level. This paper describes the generalized...
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