GATE CONTROL CIRCUIT

PROBLEM TO BE SOLVED: To provide a gate control circuit capable of turning off a gate type switching element when an overcurrent flows.SOLUTION: A gate control circuit for controlling a gate voltage of a gate type switching element includes: a charging circuit for charging the gate; a mirror voltage...

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Bibliographische Detailangaben
1. Verfasser:	KOSUGI HAJIME
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a gate control circuit capable of turning off a gate type switching element when an overcurrent flows.SOLUTION: A gate control circuit for controlling a gate voltage of a gate type switching element includes: a charging circuit for charging the gate; a mirror voltage detecting circuit for detecting a mirror voltage when the gate is charged; and a discharge circuit for discharging the gate when the mirror voltage is higher than a threshold value. By detecting the mirror voltage, an overcurrent can be detected.SELECTED DRAWING: Figure 3 【課題】過電流が流れたときにゲート型スイッチング素子をオフさせることが可能なゲート制御回路を提供する。【解決手段】ゲート型スイッチング素子のゲートの電圧を制御するゲート制御回路であって、前記ゲートを充電する充電回路と、前記ゲートが充電されているときにミラー電圧を検出するミラー電圧検出回路と、前記ミラー電圧が閾値よりも高い場合に、前記ゲートを放電する放電回路を有する。ミラー電圧を検出することで、過電流を検出することができる。【選択図】図３