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Development of A Dual Power Source Variable Frequency Drive For Irrigation

Ohiwerei Chris Ohiomah

Abstract


The objective of this work is to design, construct and analyze the efficiency of a Hybrid i.e. solar (DC) and grid (220V AC) powered Variable Frequency Drive for irrigation pump control. The Variable Frequency Drive takes in DC power supplied via a set of solar panels or 220V AC from the grid and converts this input to a 220V AC output power whose frequency can be varied in other to regulate the speed of an irrigation pump’s motor thereby minimizing the energy wasted if the pump was to start and run at a constant or fixed speed as in the case with most irrigation pumps operating at constant speed available in the market. This is a major motivation for embarking on this research work.  

When the solar panels are exposed to sunlight, the panels generate 12V DC power which is then used to charge a set of 12V batteries and at the same time supply the VFD with the required 12V input such that in the absence of sunlight, the VFD is powered by the battery bank, the speed of the irrigation pump is controlled via the VFD which converts DC 12V input to Variable frequency AC 220V output useable by the irrigation pump.


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References


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