Publication: Developement of a 500w inverter system
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Date
2009-04-01
Authors
Sabri, Ahmad Yusrie
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Abstract
The goal of the project is to produce a high efficiency inverter system to convert a 12 V dc supply to a 240 V sinusoidal ac output with a 50 Hz frequency. It is aimed at first the project will be able to produced an inverter having an efficiency of 75% or greater. A PWM switching scheme will be used for the switching of a full bridge inverter. Full bridge inverter circuit is used to convert a DC input to AC output. Output will be step up using a 500 W transformer with a ratio of 12 V primary sides and 240 V secondary sides. Another important issue in designing inverter is how the harmonics is present and how to eliminate it. A second order LC filter is able to eliminate the unwanted harmonics that occur at the output of the system. The simulation result shows that the design able to produce a circuit of high efficiency (greater than 95%), however the practical implementation fails to yield a desired output.