Power switching control apparatus
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United States of America Patent
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May 4, 2010
Grant Date -
Dec 13, 2007
app pub date -
Nov 29, 2006
filing date -
Jun 12, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A power switching control apparatus for acquiring pieces of making operation time information of individual phase switches more precisely according to loads and making instants. Making operation time information detecting means outputs the making operation time information of at least one of individual phase switches on the basis of the motion of the movable contact of the phase switch, and outputs the making operation time information of at least another of the individual phase switches on the basis of the phase current of the phase switch. Moreover, the making operation time information detecting means outputs the making operation time information ITA, ITB and ITC of an A-phase switch, a B-phase switch and a C-phase switch individually on the basis of either the detected output of a contact operation sensor and the detected output of a phase current sensor.
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