Energy Conservation Using Variable Frequency Drives for Center-Pivot Irrigation Systems Equipped with Corner Watering Attachments

. Corner watering attachments, specifically end guns and corner extensions, attached to center-pivot systems are a common means to irrigate the corners of square fields. The pumping plant is designed to supply water to all sprinklers when the center pivot is irrigating the point of maximum elevation. Most designs include powering the irrigation pump at a fixed speed, which can lead to excessive energy use. Variable-frequency drives (VFDs) were...