Electromagnetic operator for an electrical contactor and method for controlling same
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United States of America Patent
Stats
-
Dec 10, 2002
Grant Date -
Jul 26, 2001
app pub date -
Feb 23, 2001
filing date -
Sep 30, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electromagnetic operator includes first and second coils wound coaxially. An armature partially surrounds the coils for channeling flux during energization of the coils. The armature may be formed of a bent plate and secured to a ferromagnetic support. A control circuit applies energizing signals to the coils during operation. Both coils are energized during an initial phase of operation. One of the coils is subsequently released or de-energized automatically. A timing circuit removes current from the second coil after a variable time period. The time period may be a function of the configuration of the timing circuit, such as an RC time constant, and of the energizing signal.
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