IGBT SHORT-CIRCUIT DETECTION AND PROTECTION CIRCUIT AND IGBT-BASED CONTROLLABLE RECTIFIER CIRCUIT

An IGBT short-circuit detection and protection circuit, comprising: a driving unit, the output end thereof outputting a PWM driving signal and being connected to gate ends of a first IGBT (IGBT1) and a second IGBT (IGBT2), so as to simultaneously control the turning ON/OFF of the first IGBT and the...

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Bibliographische Detailangaben
Hauptverfasser:	XIE, Yongquan, SHAO, Guobin, MIAO, Yu, LI, Chengzhi
Format:	Patent
Sprache:	eng ; fre ; ger
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 BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION PULSE TECHNIQUE
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Beschreibung
Zusammenfassung:	An IGBT short-circuit detection and protection circuit, comprising: a driving unit, the output end thereof outputting a PWM driving signal and being connected to gate ends of a first IGBT (IGBT1) and a second IGBT (IGBT2), so as to simultaneously control the turning ON/OFF of the first IGBT and the second IGBT; a comparing unit, comprising a threshold pin and a detection pin (Vdesat), the threshold pin being connected to a threshold voltage, the detection pin being connected by means of a first diode (D1) and a second diode (D3) to collectors (C) of the first IGBT and the second IGBT, respectively, the detection pin supplying a detection current to the first diode and the second diode, cathodes of the first diode and the second diode being connected to the collectors of the first IGBT and the second IGBT, respectively; when the voltage at the detection pin is higher than the threshold voltage, the driving unit controlling the first IGBT and the second IGBT to be turned off. The IGBT short-circuit detection protection circuit achieves bidirectional short-circuit protection of two IGBTs in inverse series connection, without requiring an additional protection circuit.