Soft start motor control using back-EMF
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United States of America Patent
Stats
-
Dec 7, 2010
Grant Date -
Oct 22, 2009
app pub date -
Apr 16, 2008
filing date -
Apr 16, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of controlling in-rush current to a DC motor is disclosed. The method may include operating the DC motor in a first mode including applying back-EMF across a relay coil to maintain the relay in an open configuration when the back-EMF is below a predetermined voltage. The method may also include operating the DC motor in a second mode including applying the back-EMF across the relay coil to maintain the relay in a closed configuration when the back-EMF is equal to or above the predetermined voltage.
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