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Öğe Current fed self oscillating electronic ballast design with push pull inverter(2009) Börekci, S.; Öncü, S.Electronic ballasts are commonly used due to several advantages; among electronic ballasts, self oscillating electronic ballasts are not only simple and cheap but also have high efficiency because of zero voltage switching technique. Current and voltage fed topologies are commonly used in electronic ballasts. When both topologies are compared, current fed has better start up transient response. In this study, current fed push pull inverter circuit is designed for three 36W T8 fluorescent lamps. In the design, push pull transformer is wounded on a partition bobbin. Although it has the advantages of easy and reliable production for industrial automation and lowering the cost of the circuit, the coupling between the coils is considerably weak. Because of this, the weak coupling is taken into account in the design. The design has agreement with experimental and simulation results.Öğe Design and implementation of a self oscillating induction heater(2011) Bal, G.; Öncü, S.; Börekci, S.Self oscillating circuits do not require more complicated control circuit. So they can provide low cost power control with very simple control circuit. Because of these advantages the self oscillating circuit topology is widely used in some power electronics applications such as inverters and electronic ballasts. In this study, an application of self oscillating control technique was achieved on an induction heater driven by D-class inverter. Transistors used as power switches are triggered in order by the feedback signal which follows load current. For the developed self oscillating induction heating system, results obtained from simulations and experiments are compared and then presented.Öğe Wireless Power Transfer(Elsevier, 2023) Ünal, K.; Bal, G.; Öncü, S.Wireless power transfer (WPT) is the process of transferring electrical energy from a power source to a load without an electrical connection. The reason why WPT has become popular today can be listed as the effects that make human life easier, the absence of cable complexity, etc. In the first section basic information are given about WPT, which many researchers are working on today, then a brief history of WPT is provided from past to present. The various types of WPT are briefly described and detailed information about WPT systems with magnetic resonant coupling is presented. Later, basic informations about transmitter-side inverters are explained. Finally, various power control techniques used in WPT systems and the health effects of WPT are presented. © 2024 Elsevier Inc. All rights reserved.
