A multi-functional converter for a reduced cost, solar powered, water pump

Solar powered water pumps classically use a boost converter for power point tracking followed by a motor inverter to drive the pump. This paper introduces a new, novel solution using a Multi-Functional Converter (MFC) that combines the boost function and the motor inverter function into a single, 6-switch, inverter bridge. Thus reducing cost and complexity and increasing reliability. The paper describes the operation of the MFC and gives both simulated and measured results. In addition, the advantage of varying the amount of voltage boost in response to the solar panel's maximum power point is demonstrated and a performance comparison with a classical system made.