Transcription of Variable Speed Drive (VSD) for Irrigation Pumping
{{id}} {{{paragraph}}}
Example: barber
Variable Speed Drive (VSD) for Irrigation Pumping
United States Department of Agriculture NATURAL RESOURCES CONSERVATION SERVICE Engineering Technical Note No. MT-14 January 2010 Variable Speed Drive (VSD) for Irrigation Pumping Pumping water for Irrigation can be a major expense for irrigated farms. In 2003 more than 500,000 pumps were used for Irrigation , and the total estimated energy cost nationwide was over billion dollars. Improving the efficiency of Irrigation pumps has many benefits, including improving the profitability of the irrigated farm. When a single pump is required to operate over a range of flow rates and pressures, standard procedure is to design the pump to meet the greatest output demand of both flow and pressure. For this reason, pumps are often oversized and they will be operating inefficiently over a range of duties.
speed (and thus the pump impeller) changes, the pump curve shifts accordingly. Figure 9 – Pump curve changes with shaft speed ... Pulse Width Modulated (PWM) is the most prevalent. The PWM creates a series of pulses of fixed voltage and adjustable time duration (width). The sum of widths of the pulses and intermediate off cycles determine the ...
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: