Pump controller system and method

Details Pump controller system and method Pump controller system and method

2009-11-02

2010-10-26

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Motor load, armature current or force control during...

C318S280000, C318S400220, C318S635000, C318S779000, C417S044100, C417S237000, C417S271000, C417S325000, C417S326000

Reexamination Certificate

active

07821215

ABSTRACT:
Embodiments of the invention provide a method of detecting a fault condition in a motor of a pump. The method includes sensing a first current value and a speed of the motor, attempting a recovery operation if the first current value is greater than a current threshold and if the speed of the motor is less than a motor speed low threshold, and sensing a second current value during the recovery operation and shutting down a drive to the motor if the second current value is also greater than the current threshold. The method also includes performing the recovery operation for a time period if the second current value is less than the current threshold and attempting to operate the motor in a normal mode after the time period has elapsed.

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patent: 5883489 (1999-03-01), Konrad
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patent: 6330525 (2001-12-01), Hays et al.
patent: 6362591 (2002-03-01), Moberg
patent: 6373204 (2002-04-01), Peterson et al.

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