VFDs (also referred to as variable speed drives) can reduce output by controlling the motor speed (rpm) rather than having the motor work at a constant, almost full load only to have water flow throttled by the pivot itself. A VFD can reduce the amount of electricity (kilowatt-hours) you use in a season up to 30%. Every system is different so savings will vary.
While incorporating a VFD into your corner system will not likely reduce your connection, a demand or horsepower utility charges, it will save energy.
Additional benefits include:
- Control of startup and shutdown procedures
- Reduces motor burn outs
- Prevents shaft breaks
- Reduces wear on pumps, motors and regulators
- Keeps pumps working at best efficiency
- Reduces voltage drop on power lines at start up
- Eliminates need for pump flow control valves in many instances
- Controls pump to deliver accurate flows or constant pressures
- Minimizes water hammer in pipelines due to controlled acceleration/deceleration
$18 Per Horsepower
Revised: January 2022