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US 7,857,600 B2Granted
Pump controller system and method
AssigneeSta-Rite Industries, Inc.
InventorRobert M. Koehl
Life of this patent
Estimating the term…
Abstract
A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when system parameters are exceeded and/or fault conditions occur, can detect fault conditions, and can store fault conditions for later retrieval.
Claims4
A method of detecting a foreign object obstruction in a pool or spa, the pool or spa being coupled to a pump and a motor, the method comprising:
- measuring a voltage and a current being provided to the motor;
- determining a power factor based on the voltage and the current;
- determining whether a fault condition has occurred due to the presence of a foreign object obstruction in the pool or spa based on the voltage, the current, and the power factor;
- shutting down the motor when the fault condition has occurred;
- and
- indicating to a user that the fault condition has occurred.
3 more elements
Dependencies are inferred from the claim text.