Active clamp circuit of power semiconductor switch and power converter using the same

• Main Authors: WANG XIN, LAI CHENYU, LI WUYING, QIAO LIFENG, YING JIANPING
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2019
• Subjects: 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

The invention discloses an active clamp circuit of a power semiconductor switch and a power converter using the same. The active clamp circuit includes a discharging circuit, a one-way blocking circuit, a first zener diode and a resistance-capacitance circuit; the discharging circuit includes first and second ends, the first end of the discharging circuit is electrically connected to a collector electrode of a power semiconductor switch; the first zener diode and the one-way blocking circuit are in series connection to form a series branch; the series branch includes first and second ends; thefirst end of the series branch is electrically connected to the collector electrode of the power semiconductor switch; the resistance-capacitance circuit includes first and second ends; the first terminal of the resistance-capacitance circuit, the second terminal of the discharging circuit and the second end of the series branch are in electric connection; and the second end of the resistance-capacitance circuit is elect