POWER SUPPLY APPARATUS
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United States of America Patent
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Issued Date -
Apr 12, 2012
app pub date -
Dec 21, 2010
filing date -
Oct 6, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A relay contact is connected between positive power supply input terminals of first and second inverters, and a relay contact is connected between negative power supply input terminals of the inverters. A positive DC power supply terminal is connected to the positive power supply input terminal of the first inverter, and a negative DC power supply terminal is connected to the negative power supply input terminal of the second inverter. A drive unit opens or closes the relay contacts when a voltage appearing between the positive and negative DC power supply terminals is larger than a predetermined value or is not larger than the predetermined value, respectively. A diode has its anode and cathode connected to the negative power supply input terminal of the first inverter the positive power supply input terminal of the second inverter, respectively.
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