DC CUTOFF DEVICE

PROBLEM TO BE SOLVED: To cut off a bi-directional DC current with certainty, in a DC cutoff device.SOLUTION: A mechanical circuit breaker CB is connected between a positive terminal of a first DC system 1 and a positive terminal of a second DC system 2. A first capacitor C1 is connected between a co...

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Bibliographische Detailangaben
Hauptverfasser: OI KAZUNOBU, TADANO YUGO, UEKURI NOBUHITO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To cut off a bi-directional DC current with certainty, in a DC cutoff device.SOLUTION: A mechanical circuit breaker CB is connected between a positive terminal of a first DC system 1 and a positive terminal of a second DC system 2. A first capacitor C1 is connected between a common connection point of the positive terminal of the first DC system 1 and the mechanical circuit breaker CB, and negative terminals of the first and second DC systems 1 and 2. A first semiconductor switching element T1 is connected between a common connection point of the positive terminal of the second DC system 2 and the mechanical circuit breaker CB, and the first capacitor C1. A second capacitor C2 is connected between the common connection point of the positive terminal of the second DC system 2 and the mechanical circuit breaker CB, and the negative terminals of the first and second DC systems 1 and 2. A second semiconductor switching element T2 is connected between the common connection point of the positive terminal of the first DC system 1 and the mechanical circuit breaker CB, and the second capacitor C2.SELECTED DRAWING: Figure 1 【課題】直流遮断装置において、確実に双方向の直流電流を遮断する。【解決手段】第1直流系統1の+端子と第2直流系統2の+端子との間に機械遮断器CBを接続する。第1直流系統1の+端子と機械遮断器CBの共通接続点と、第1,第2直流系統1,2の−端子と、の間に第1コンデンサC1が接続される。第2直流系統2の+端子と機械遮断器CBの共通接続点と、第1コンデンサC1との間に第1半導体スイッチング素子T1が接続される。第2直流系統2の+端子と機械遮断器CBの共通接続点と、第1,第2直流系統1,2の−端子と、の間に第2コンデンサC2が接続される。第1直流系統1の+端子と機械遮断器CBの共通接続点と、第2コンデンサC2との間に第2半導体スイッチング素子T2が接続される。【選択図】図1