Bridgeless Filterless Neutral-Point-Clamped Resonant AC/DC Converter

In this article, we present a bridgeless filterless neutral-point-clamped (NPC) resonant ac/dc converter. By using the push-pull transformer itself, with the primary-side switching modulation fixed at 0.5, the proposed ac/dc converter accomplishes theoretically zero input-current ripple and so does...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2023-09, Vol.70 (9), p.8895-8906
Main Authors: Kim, Myeong-Hwan, Park, Jae-Woong, Kim, Minsung
Format: Article
Language:English
Subjects:
AC-DC converters
AC-DC power converters
Bridges
Capacitors
Clamping
Conduction losses
Diode rectifiers
High efficiency
Inductors
input current harmonics
low voltage stress
power-conversion unit
push–pull resonant converter
Stress
Switches
Transformers
Voltage
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Summary:In this article, we present a bridgeless filterless neutral-point-clamped (NPC) resonant ac/dc converter. By using the push-pull transformer itself, with the primary-side switching modulation fixed at 0.5, the proposed ac/dc converter accomplishes theoretically zero input-current ripple and so does not need the extra input filter. Semibridgeless configuration reduces the conduction loss associated with an input full-bridge diode rectifier. The resonant NPC structure much reduces the voltage stress at turn- off instant; this aspect reduces the turn- off loss occurred at the secondary-side switches. Therefore, the proposed converter features low cost, high power density, and high efficiency. A prototype with 1-kW output power is implemented to verify the superior properties of the proposed ac/dc converter.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2022.3206751