Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1997-01-24
1998-05-05
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363131, H02M 3335, H02M 7537
Patent
active
057484570
ABSTRACT:
A family of power converter is invented. Each of these converter accomplishes zero voltage switching to minimize switching losses. The basic embodiment comprises of two switches connected across the input source, a series combination of inductor and capacitor is connected to the node joining the two switches. The switches are driven by asymmetrical driving pulses with variable duty cycle. The output comprises of an inductor and capacitor filter and diode combinations. This arrangement minimise output ripple. In order to further reduce dissipation switches are connected in parallel with output diodes and these switches operation in synchronization with the main switches. The basic embodiment can be modified to provide converter with negative output or boost output. The embodiment can also be modified for isolated converter with transformer in both the half bridge and full bridge circuit.
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patent: 5057986 (1991-10-01), Henze
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patent: 5539630 (1996-07-01), Pietkiewicz et al.
patent: 5615093 (1997-03-01), Nalbant
patent: 5638260 (1997-06-01), Bees
Pong Man Hay
Poon Franki Ngai Kit
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