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In an isolated DC-DC converter utilized in the HVDC power distribution system, a large surge voltage occurs across the secondary-side diodes due to the transformer's leakage inductance, and then the diodes with a large withstand voltage are required. However, those diodes cause a lot of power loss. In this paper, a simple surge snubber with prominent surge suppression capability is examined, and the...
This paper proposes an interesting control technique which cancels the transfer function of the converter by using pole-zero-cancellation method. The system stabilization design is easy to be realized by applying this technique. The impaired system stability caused by parameter variation is investigated, especially the influence of the output capacitance variation. Moreover, a parameter tracking method...
This paper considers the malfunction mechanism of semiconductor circuit breaker in high voltage DC power supply system (HVDC). In HVDC system, the fast response breaker is required. Semiconductor circuit breaker is paid attention as one of the key technology in HVDC. However, in some condition, the semiconductor circuit is malfunctioned. When malfunction is happened, unexpected large current is flown...
Recently, the distributed power system is mainly used for the power supply system which requires the low-voltage / high-current output. The distributed power system consists of bus converter and POL. The most important factor is the system stability in bus architecture design. The overlap between the output impedance of bus converter and input impedance of POL causes system instability, and it has...
POL with peak current mode control has first-order response depending on the controller design, and the overshoot and undershoot donpsilat appear in transient response. This feature is the chief advantage of peak current mode control. However, there is no example of the design that employed this feature efficiently. This paper investigates the design consideration for first-order response of peak...
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