SWITCHING POWER SUPPLY CIRCUIT

SWITCHING POWER SUPPLY CIRCUIT

The present invention relates to a power factor correction circuit capable of eliminating a reverse voltage. A master transistor (S1) and a slave transistor (S2) are both insulated gate bipolar transistors. A slave diode (D21) is connected in anti-parallel to the slave transistor (S2). The master tr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OHSHITA Kazuhiro, SAKAE Norio, YABUKI Toshio
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:The present invention relates to a power factor correction circuit capable of eliminating a reverse voltage. A master transistor (S1) and a slave transistor (S2) are both insulated gate bipolar transistors. A slave diode (D21) is connected in anti-parallel to the slave transistor (S2). The master transistor (S1) is brought into conduction if a current flowing in a master reactor (L1) becomes zero, and is brought into nonconduction after elapse of a first period. The slave transistor (S2) is brought into conduction subject to elapse of a certain period after the master transistor (S1) is brought into conduction that is one of conditions for conduction of the slave transistor (S2), and is brought into nonconduction after elapse of a second period shorter than the first period. The certain period is shorter than a period from when the master transistor (S1) is brought into conduction until when the master transistor (S1) is brought into conduction again.