Power-supply apparatus
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United States of America Patent
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Jul 18, 2017
Grant Date -
Aug 11, 2016
app pub date -
Oct 4, 2013
filing date -
Oct 4, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A power supply apparatus includes a controller that performs the following action and resonance means for creating a resonance state between the power supply apparatus and a plasma generator. That is, the controller changes, when a value of electric power input equal to 100% (or a value of electric power input equal to or more than a threshold % and equal to or less than 100%) of a rated power is instructed, an inverter frequency and obtains an inverter output power factor for each of a plurality of inverter frequencies. Then, the controller determines, as a driving frequency of the inverter, one of the plurality of inverter frequencies at which the inverter output power factor is maximized.
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