Intelligent pump system
AssigneeFlowserve Management Company
InventorsDennis M. Rusnak, Jason Ballard, Roger S. Turley
Life of this patent
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Abstract
The present invention is a controller specifically for pumps, making the benefits of variable frequency drive (VFD) technology more accessible to pump users. The present invention incorporates pump-specific system optimization software, an industrial grade drive, and a menu-driven user interface, offering protection, reliability, and ease of use not possible with other variable frequency drives.
Claims40
A method of controlling operation of a centrifugal pump in a fluid pumping system having a variable frequency drive (VFD) powering an alternating current (AC) motor which turns said centrifugal pump, said method comprising:
- internally monitoring automatically output current and voltage of the VFD to the AC motor without the need for an external sensor;
- calculating automatically output power based on monitored values of said output current and voltage;
- checking automatically whether said calculated output power is either above a predetermined high power limit or below a predetermined low power limit for a desired setpoint;
- and
- initiating automatically a predetermined response action if said calculated output power is either above said predetermined high power limit or below said predetermined low power limit.
Dependencies are inferred from the claim text.