PV Array Fed SEPIC and VSI Based Power Conversion System for Single Phase Induction Motor Drive

This paper proposes an implementation of Single Ended Primary Inductor Converter (SEPIC) converter and Voltage Source Inverter for an Induction Motor using Photovoltaic energy as a source. Generally the larger number of drives employed for industrial and commercial applications are induction motor drives. To run such kind of motor from the PV source, it is proposed to have a DCDC converter and an inverter circuit as interface circuits. As the PV cell posses the nonlinear behavior, a DC-DC converter with Maximum Power Point Tracker (MPPT) controller is needed to improve its utilization efficiency and for matching the load to the photovoltaic modules. In this paper SEPIC converter (DC-DC converter) with Perturb and Observe MPPT algorithm is used for matching the load and to boost the PV module output voltage. To convert the boosted DC output voltage from PV module into AC, a voltage source inverter with sinusoidal pulse width modulation is implemented on it to attain sufficient voltage to drive single phase induction motor. The simulation work of these SEPIC converter and voltage source inverter fed induction motor circuits have been done using PSIM and MATLAB software. The experimental work is carried out with the SEPIC converter and voltage source inverter to drive the single phase induction motor. A PIC microcontroller is used to generate pulses for controlling the SEPIC converter