Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1996-07-29
1998-03-24
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 65, 363 69, H02M 706, H02M 768
Patent
active
057319693
ABSTRACT:
A solid-state, PFC power converter for converting 3-phase AC to DC in a single, isolated conversion step, using 3 forward converters. Converter outputs share a common output choke, permitting operation at low instantaneous AC input voltage. Each forward converter is "duty" modulated proportional to its rectified AC input voltage, producing unity input power factor. The constant of proportionality for 3 converters is controlled to regulate the DC output voltage. A control circuit provides immunity to AC input distortion and noise. The control circuit operates with various forward converter topologies, and is compatible with integrated circuit processes. A version using phase or symmetry modulated full-bridge converters, requires only 2 output rectifiers.
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Patel Rajnikant B.
Wong Peter S.
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