Yazar "Oktay, Ulas" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Comparison of Pan Detection Methods for Single Switch Topology Used in Domestic Induction Cooking
    (IEEE, 2020) Öztürk, Metin; Oktay, Ulas; Yilmaz, Namik; Yardibi, Hakan Suleyman; Sinirlioglu, Sercan
    This Induction heating technology is very popular in home appliances because of the user safety, efficient heating, easy cleaning and fast heating reasons. Detection of suitable receptacle or vessel is essential for domestic induction cooking applications due to user safety, over-current protection and efficient heating reasons. Especially in the single switch topology, it could be even more complicated to determine pan size and/or position compared to other topologies. In this paper three pan detection methods are presented and analyzed. First method is comparison of IGBT collector voltage or coil current with pre-defined values. Second one is comparison of single switch IGBT collector voltage VcE with DC Bus voltage Vric and the third one is evaluating anti-parallel diode current conduction time.
  • [ X ]
    Öğe
    Performance evaluation of pan position methods in domestic induction cooktops
    (Springer, 2023) Altıntaş, Nihan; Öztürk, Metin; Oktay, Ulas
    The single-switch quasi-resonant inverter topology is typically favored for low-cost and low-output-power applications among the resonant inverters used in induction heating systems. Despite the low-cost advantage of the quasi-resonant inverter, the soft-switching range is quite narrow, and it is not stable depending on the electrical parameters of the load that is desired to be heated. In addition, to ensure safe operation in induction cookers, it is important to know the properties of the material from which the pan is made, the diameter of the pan, and the coverage ratio between the pan and the coil. Especially in the single-switch quasi-resonant topology, it is complicated to determine pan size and pan position compared to other topologies. On the other hand, closed-loop power control algorithms are essential for single-switch inverter applications. A big relationship exists between pan detection algorithms and closed-loop power control methods used. This study proposes six alternative methods of determining the pan-coil coverage ratio for the single-switch quasi-resonant topology used in domestic induction heating cooktops. Unlike state-of-the-art methods, the proposed methods do not increase the system's cost since they use the processor for power control, are not complicated, and provide ease of application. Each method is examined in a simulation environment and experimentally for different coverage rates and compared. As a result of the comparison, the diode conduction time method in single-switch quasi-resonant systems is the most appropriate regarding reliability and applicability.