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Possesses the Drive circuit and the electrostatic induction forma self arc extinction component of the electrostatic induction forma self arc extinction component the inverter device
Possesses the Drive circuit and the electrostatic induction forma self arc extinction component of the electrostatic induction forma self arc extinction component the inverter device
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机译:具有逆变器装置的驱动电路和静电感应式自消弧部件的静电感应式自消弧部件
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摘要
PURPOSE:To always decrease and interrupt and over-current and to prevent the element destruction by taking priority to the fact that a gate voltage is lowered to a prescribed value more than the stopping signal at a control side after the over-current is detected. CONSTITUTION:The gate and collector of a static induced type self-arc extinction element IGBT 10 are connected through a resistance 11 and a diode 12 and the connecting point of the resistance 11 and the diode 12 is connected to the base of a transistor 15. An equivalent overcurrent detecting circuit to detect the collector voltage during the gate voltage impression is constituted at an IGBT 10. An overcurrent detecting signal is transferred to a control side by the transistor 15, the resistance 17, a diode 18 and a capacitor 19 and a gate voltage adjusting circuit is constituted. To the emitter of the transistor 15, a resistance 20 and a capacitor 21 are connected, one side of the capacitor 21 is connected to the base of a transistor 23, the collector of a transistor 23 is the collector of a transistor 3 and an ON holding circuit is constituted. Thus, when the overcurrent is detected, after the flow is surely decreased, the interruption can be performed.
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