System and method for detecting motor run condition
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United States of America Patent
Stats
-
Mar 11, 2008
Grant Date -
Nov 3, 2005
app pub date -
Apr 28, 2004
filing date -
Apr 28, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor control system for detecting motor run condition comprises power switches for connection to an AC line for controlling application of AC power to the motor. An input receives a motor start command. A controller is connected to the input and controls operation of the switches responsive to a motor start command. The controller includes a counter and a timer and is operable to disable the power switches if number of starts during a select interval exceeds a first threshold and to disable the power switches if motor run time after a motor start command exceeds a second threshold.
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