Hybrid DC electromagnetic contactor
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United States of America Patent
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Jul 18, 2006
Grant Date -
Oct 16, 2003
app pub date -
Apr 2, 2003
filing date -
Apr 12, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a hybrid DC electromagnetic contactor, by including a power unit for supplying a certain power voltage; a main contact point of a breaking switch for providing a supply path of the power voltage by being switched in accordance with a voltage apply to an operational coil; a switch for providing a supply path of the power voltage according to a gate signal; a snubber circuit for charging voltage at the both ends of the switch in turning off of the switch and being applied-discharged an electric current when the charged voltage is not less than a certain voltage; and a discharge current removing unit for removing the discharge current by providing a discharge current path to a load block in turning off of the switch, it is possible to minimize a size of leakage current when the main contact point and the semiconductor switch are turned off, and accordingly it can be practically used.
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