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۱DC–DC Boost Converter for Grid–tied Renewable Energy Generation Systems
اطلاعات انتشار: World Applied Sciences Journal، سي ام،شماره۲، ۲۰۱۴، سال
تعداد صفحات: ۴
In on–board electronic circuits the use of DC–DC converters is very common for translation and stability of DC levels. These converters are used primarily to step–up or step–down DC levels, they are also employed for steady DC voltage output generated from ambient energy sources such as solar and wind power. In such converters, an inductor plays a major role by being fluxed to get magnetized to a constant voltage level and then it is de–fluxed by diverting the current using a switching electronic device. This paper studies the effect of change in inductance on the resulting output voltage in a boosting mode. The results are standardized to a variety of inductance coil by given geometrical dimensions. The experimental and analytical details of the design is explained and discussed thoroughly, also resulting voltage outputs against each change in inductance level its effect are presented to be having a reasonably matched level in comparisons to results in recently reported research work. The potential applications of this work can be in zero crossing, frequency, phase and amplitude synchronization in grid–tied inverters.

۲LM555 Timer–Based Inverter Low Power Pure Sinusoidal AC Output
اطلاعات انتشار: World Applied Sciences Journal، سي ام،شماره۲، ۲۰۱۴، سال
تعداد صفحات: ۳
The demand of highly efficient and stable DC to AC inverters used in renewable energy systems to convert DC output from green energy sources into purely sinusoidal unwavering AC is on rise, due to low cost energy generation and conversion, less complexity and environmental factors. Later this converter energy can be feed in to grid or utility supply for load sharing purpose also (can be work as Distributed Generation System (DGS)). This paper represents a duty cycle–based configuration of LM555 timer to generate an AC output of 50Hz. Two BJT transistors (NPN and PNP) are used to convert the 12V DC into 12V AC cycle. Also the low pass filter design is tested to transform distorted square wave into pure sinusoidal wave with minimum ripples on no load condition. The results shown are simulation based, showing a proper shape of 220V AC output with very less harmonics surges and noise effects.
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