強制転流能力を有する一3相サイリスタブリッジ

概要

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The series-diode-system thyristor bridge is able to act as a controllable rectifier and inverter over the whole control angle from positive to negative, and is of practical use. However, it has four semi-conductor elements in the main current path, therefore it is not desirable from view points of loss, voltage regulation and cost. We have been looking for the thyristor bridges which have the same ability and more have only two elements in the main current path. Previously, we showed that a certain thyristor bridge, which had been only using as the self-excited inverter, satisfied this requirement. But it had several disadvantages, namely the need of starting auxiliary source, and a number of commutating capacitor and auxiliary thyristor. This time, we encountered other thyristor bridge which had a same ability. This needed not a separate auxiliary source and had a small number of commutating capacitor and auxiliary thyristor compared with former. We have analyzed the mechanism of establishing the commutating voltage about it and concluded by saying that the commutating voltage is aquired over the whole control angle, and since it has excellent performance, wider applications will be expected.
山梨大学の論文