Method and apparatus for controlling operation of a submersible pump
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United States of America Patent
Stats
-
Jul 3, 2001
Grant Date -
N/A
app pub date -
Sep 14, 1999
filing date -
Oct 6, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A submersible pumping system which, in one embodiment, includes a motor, a pump and a control circuit, or unit, coupled to the motor for controlling the operation of the motor is described. Using motor and sensor signals, the control unit detects various conditions within the pumping system and alters motor operation. In an exemplary embodiment, the control unit initiates an oscillation sequence of applying a forward torque for a first preselected period of time, applying a reverse torque for a second preselected period of time, and then repeating the torque applying steps a selected number of times to eliminate an obstruction from the pump.
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