Single phase induction motor drive scheme for pump irrigation using photovoltaic source

The authors present the modeling and simulation of a solar powered induction motor drive for pump irrigation. The model can be used to relate input quantities like solar array voltage and current to outputs like speed and torque. The simulation of the unified system is presented and the results can be used to select the ratings of the various components. Using a harmonic elimination technique, the inverter firing signals are so designed that lower order harmonics are eliminated. This helps in reducing unnecessary heating created by lower order harmonic currents and allows better utilization of the induction motor. Also, a simple technique to maximize the power output of solar array by modulating the duty ratio of the chopper is presented