Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1993-12-08
1996-10-08
Wong, Peter S.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 20, 363 40, 307 82, H02M 300
Patent
active
055637809
ABSTRACT:
Decreased input and output ripple current and ripple voltage on a switched mode power conversion array is realized at high power levels and frequencies by coupling an input power signal across an input capacitance to which a plurality of smaller power converter circuits are coupled in parallel. The converter circuits may have any topology now known or later devised. Each of the converter circuits are sequentially operated in a phase shifted manner across the period of the conversion frequency in a time overlapping relationship. For example, if there are N converters and the period of the conversion frequency is T, each converter circuit is triggered or switched at a phase shift corresponding to a time increment of T/N delayed with respect to the preceding or subsequent converter. The output of each of the converters is then coupled in parallel to an output capacitance. The operation of the converters may each be regulated in any manner now known or later devised and are shown in the illustrated embodiment as being pulse width modulated to provide a regulated output.
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Berhane Adolf
International Power Systems, Inc.
Wong Peter S.
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