2 research outputs found
Design, Construction and Testing of an Uninterruptible Power Supply of 300 Watts Capacity
The interruption of power supply is a source of concern to the consumer, and gives rise to the need to provide emergency power source in some important areas of both domestic and industrial application. This has led to the design and construction of the Uninterruptible Power Supply (UPS). In this work, we made use of solid state components, with the aid of background knowledge in the field of electronics, to locally manufacture a UPS which could be used for back-up power for critical and essential loads. For the design, a battery is used to provide direct voltage and current, which is inverted by the inverter. The inverted 12v a.c., 50 Hz, is transformed using the transformer to 240v a.c., 50Hz. The system also has in-built voltage reversal protection, automatic change-over and battery charger, which recharges the battery for continuous use when mains supply is restored. The output power of the constructed device was found to be 290 watts (determined by power transistor), which gives a percentage error of 3.3%
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Genetic folding/programming toolbox: Analogue circuit design case study
Abstract: This work introduces the concept of genetic folding/programming combination to develop a standalone optimisation tool and the developed algorithm is tested with four different benchmark functions. Most GP used in circuit evolution interface two software packages but this work only Matlab is used which reduces the time used for transferring the simulation between the two platforms. To enhance testing of the algorithm and automatic Netlist creation, the expression is extracted with the aid of genetic folding. The automatically simulated Netlist is fed to modified symbolic circuit analysis in Matlab that translate it to matrices to enhance frequency response. The frequency response is then compared to the set frequency response and the RMS difference gives the error which controls the programme towards the desired solution. One circuit is tested and the algorithm successfully evolved the set frequency response.The lead author acknowledges the financial support from Tertiary Education Trust Fund (TetFund) through University of Calabar, Calabar, Nigeria