Browsing by Author "Uzmus, H."

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Digital Control of Bridgeless Interleaved Pfc Boost Converter Based on Predicted Input Current
(Taylor & Francis Ltd, 2022) Genc, N.; Uzmus, H.
In this study, digital control of bridgeless interleaved power factor correction (PFC) boost converter is presented by using DSP (digital signal processor) for prediction of input current without any current sensing. The complex control methods which have current sensing are utilized to get minimum ripple for current and appropriate sharing of current for interleaved PFC converters that reduce input current ripple and improve power rating, so they are much more convenient than the classic PFC converters. The current signals do not need to be sampled for proposed predictive control approach due to sampling of the voltages of input and output. The sampled voltages of input and output are employed to calculate input current for the converter. The parameters of converter, calculated input current and reference current that acquired from the voltage loop compensator are employed for predicting following duty cycle. By this way, the complex signal processing and current measuring are taken out when compared with the conventional control methods. An experimental circuit of bridgeless interleaved PFC boost converter has been installed to apply the proposed predictive control method via DSP board. It is seen from the results that appropriate sharing of current, the low value of total harmonic distortion (THD) and high rate of power factor can be acquired thanks to using the proposed predictive control strategy.
Dynamic Behavior of Dc-Dc Boost Converter Controlled With Cascade Pi-Asc
(Institute of Electrical and Electronics Engineers Inc., 2017) Genc, N.; Uzmus, H.; Iskender, I.
This paper deals with controlling DC-DC boost converter by average sliding controller (ASC) cascaded with PI voltage controller. In the study after modeling of circuit configuration, the cascaded PIASC controller is applied to the DC-DC Boost converter. The output value of PI voltage controller is used as a reference current value for ASC which is used for current controller. The topology is modeled and simulated in MATLAB/Simulink program under variable load. Then the simulation results of the PIASC controller are compared to that of PI-PI controller. © 2016 IEEE.
An Experimental Performance Analysis of Canal-Mounted Photovoltaic Systems Regarding Energy Production and Water Conservation
(Elsevier Ltd, 2025) Canbaz, A.; Karakoyun, Y.; Uzmus, H.
Traditional ground-mounted photovoltaic (PV) systems encounter considerable obstacles, including land scarcity and performance decline at elevated operating temperatures. Canal-mounted photovoltaic (CM-PV) systems have significant benefits by leveraging existing canal infrastructure, improving thermal efficiency, and mitigating water evaporation—an increasingly pressing concern in dry and water-scarce areas. Nonetheless, empirical investigations on CM-PV systems are limited in the literature, especially regarding practical application and operational constraints. This research seeks to assess the energy efficiency and water conservation capabilities of CM-PV systems in comparison to conventional ground-mounted PV panels under actual working settings inside a hot and arid area. Experiments were performed to assess panel surface temperatures, energy efficiency, and water evaporation at various tilt angles (8°, 23°, and 38°). CM-PV panels demonstrated surface temperatures that were up to 6.33 °C lower and, on average, 4.2 °C lower than ground-mounted panels, leading to enhanced energy efficiency. Shaded canals equipped with photovoltaic panels shown reduced evaporation rates relative to open canals; specifically, at an 8° tilt, water evaporation decreased from 10 to 6 L. Reduced tilt angles increased closeness to the water surface, hence enhancing cooling and performance. Although data illustrate the benefits of CM-PV systems in energy and water management, obstacles persist, such as long-term durability, integration into diverse canal geometries, and cost-effectiveness. This study offers substantial empirical data to address these deficiencies and supports the potential of CM-PV systems as a dual-benefit approach for sustainable energy and water conservation. © 2025 International Solar Energy Society