Publication: Microcontroller-based inverter with loading feedback
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Date
2010-04-01
Authors
Mat Rozei, Norazehar
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Abstract
The primary goal of this project is to implement and test a design of microcontroller-based single phase inverter with loading feedback. The type of switching technique used in this project is sinusoidal pulse-width modulation switching technique. The input voltage is 24 Vdc, and the output voltage is 240 Vrms without filtering circuit. The frequency of an output voltage is 50 Hz and output power around 100 W. The microcontroller, PIC16F877A is used to directly generate the sinusoidal pulse-width-modulated switching signals and to detect the loading feedback of an inverter. The complete design is simulated by using PESIM software and PIC Simulator IDE software. The schematic circuit is also draw using Eagle software. The simulation results are compared with the measurement obtained from the hardware testing. The output of this inverter is modified square-wave and contained harmonic. A second order LC filter is used in order to eliminate the unwanted harmonics that occur at the output of an inverter. The simulation result shown this design can produce the high efficiency. However, the practical implementation fails to yield a desired output.