Power supply apparatus including power conversion circuit controlled by PWM control circuit
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United States of America Patent
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Nov 29, 2016
Grant Date -
Jan 15, 2015
app pub date -
Mar 30, 2012
filing date -
Mar 30, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A power conversion circuit connected to a three phase alternating current line is controlled in a PWM system. To control an arm corresponding to each phase, first to third carrier wave signals are generated. The first to third carrier wave signals include two signals having phases, respectively, offset by 180 degrees from each other. This allows a zero phase component to less frequently reach a peak value and be accordingly reduced as time averaged. This can reduce a zero phase harmonic component generated from a power supply apparatus.
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