Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1999-03-12
2000-10-03
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363144, 363 89, H02M 7217, H02M 100
Patent
active
061282065
ABSTRACT:
A rectifier circuit having voltage clamping circuitry is disclosed. The rectifier circuit includes a transformer having a primary winding and a secondary winding and transistor switches each being connected to an end of the secondary winding of the transformer. The rectifier circuit further includes a first diode having an anode terminal connected to a first end of the secondary winding and a second diode having an anode terminal connected to a second end of the secondary winding. The cathode terminals of the first and second diodes are coupled to a capacitor. The energy stemming from voltage spikes and/or high frequency ringing appearing at the transistor switches due to parasitic effects is effectively absorbed by the first and second diodes and collected in the capacitor. The collected energy is recycled to control the operation of the transistor switches.
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Hart William
Sun Mark N.
Ericsson Inc.
Patel Rajnikant B.
Wong Peter S.
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