SWITCHING TRANSISTOR TURN-OFF NEGATIVE VOLTAGE DETERMINATION METHOD AND APPARATUS, AND SWITCHING TRANSISTOR DRIVING CONTROL CIRCUIT

SWITCHING TRANSISTOR TURN-OFF NEGATIVE VOLTAGE DETERMINATION METHOD AND APPARATUS, AND SWITCHING TRANSISTOR DRIVING CONTROL CIRCUIT

Provided are a method and apparatus for determining a turn-off negative voltage of a switching transistor, and a switching transistor drive control circuit. The method for determining the turn-off negative voltage includes: determining a first turn-off negative voltage model and a second turn-off ne...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SHI, Hongkang, QIN, Feixiang, LI, Junlong
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
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:Provided are a method and apparatus for determining a turn-off negative voltage of a switching transistor, and a switching transistor drive control circuit. The method for determining the turn-off negative voltage includes: determining a first turn-off negative voltage model and a second turn-off negative voltage model (S11); inputting acquired turn-off gate resistance and turn-on gate resistance of the switching transistor, an acquired bus voltage, and an acquired minimum turn-on voltage of the switching transistor into the first turn-off negative voltage model to obtain a turn-off negative voltage upper limit absolute value of the switching transistor (S13); inputting the acquired turn-off gate resistance and turn-on gate resistance of the switching transistor, the acquired bus voltage, and an acquired maximum bearable negative voltage absolute value of the switching transistor into the second turn-off negative voltage model to obtain a turn-off negative voltage lower limit absolute value of the switching transistor (S15); and determining a turn-off negative voltage interval of the switching transistor based on the turn-off negative voltage upper limit absolute value and the turn-off negative voltage lower limit absolute value (S17).