Variable-frequency drives for electric irrigation pumping plants save energy | Zendy

Blaine Hanson | Zendy; Claus H. Weigand | Zendy; Steve Orloff | Zendy

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Variable-frequency drives for electric irrigation pumping plants save energy

Author(s) -

Blaine Hanson,

Claus H. Weigand,

Steve Orloff

Publication year - 1996

Publication title -

california agriculture

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.472

H-Index - 25

eISSN - 2160-8091

pISSN - 0008-0845

DOI - 10.3733/ca.v050n01p36

Subject(s) - horsepower , variable (mathematics) , electric motor , variable frequency drive , environmental science , automotive engineering , water pumping , submersible pump , control theory (sociology) , engineering , computer science , electrical engineering , marine engineering , power (physics) , mathematics , mechanical engineering , physics , control (management) , mathematical analysis , quantum mechanics , artificial intelligence , inlet

The constant rpm (revolutions per minute) of electric motors prevents adjusting pump performance to match variable operating conditions, and therefore the pump output is usually reduced or throttled. Variable-frequency drives of electric motors have the potential to adjust pump performance to match operating conditions by reducing motor and pump rpm. Field tests at five sites showed that pump performance at the reduced rpm could reasonably match that under the throttled conditions, but at a much lower horsepower demand. However, for economic reasons, pumping plants using a variable-frequency drive should be operated at least 1,000 hours per year.

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