Renewable energy system Based Stand-Alone system for DC-AC Converter fed BLDC Motor

Guggilla. Sirisha, MD. Kouser, Rushi Santhosh Singh Thakur


This paper proposes an effective Maximum Power Point Tracking (MPPT) controller being incorporated into a solar Photovoltaic system supplying a Brushless DC (BLDC) motor drive as the load. With solar customers in many states now receiving a low price for electricity sold back to the grid, battery back-up systems can be available alternative as they use the electricity stored during the day to run your house at night. In order to address this issue, a two-stage stand-alone scheme consisting of a novel transformer coupled dual-input converter (TCDIC) followed by a conventional full-bridge inverter is proposed. The proposed TCDIC can realize maximum power point tracking and battery charge control while maintaining the proper voltage level at the load terminal. A suitable control strategy for the proposed TCDIC devised for manipulating the TCDIC to realize the first two aforementioned objectives, while the third objective is achieved by employing a conventional proportional integral (PI) controller to control the output voltage of the full bridge inverter through sinusoidal pulse width modulation. Due to significant increase in the demand of electric motors, design and manufacturing of high efficiency motors and related variable speed drives has been a major interest by many suppliers. Brushless DC (BLDC) motor has many advantages including high torque capability. The simulation results are performed by using Matlab/Simulink software.

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