...Billel Allouane; Moustafa Sahnoune Chaouche; Samir Moulahoum Purpose This paper aims to present a novel analytical search space-narrowing optimization algorithm for accurately estimating the enhanced lumped mutually coupled ( ELMC ) equivalent model parameters of transformer windings. The ELMC...

...Alexander Sauseng; Alice Reinbacher-Köstinger; Peter Hamberger; Manfred Kaltenbacher; Klaus Roppert Purpose A precise numerical simulation environment for transformer models can be challenging due to the hysteretic core behavior. Assuming linear material laws ensures efficient and straightforward...

...Bin Chen; Hongxia Cao; Nina Wan Purpose The purpose of this paper is to study the insulation structure optimization method of multiwinding high-frequency transformer (HFT). Design/methodology/approach This paper takes 100 kW, 10 kHz multiwinding HFT as the research object. First...

... to modify the original ODE is novel. It can be used on different fields of the physics, where a second-order ODE is describing the problem, which has only measured or empirical damping. Figure 2. Damaged winding and lead exit of a mock-up transformer The friction forces depend on the forces...

...Stjepan Frljić; Bojan Trkulja; Ana Drandić Purpose The purpose of this paper is to present a methodology for calculating eddy current losses in the core of a single-phase power voltage transformer, which, unlike a standard power transformer, has an open-type core (I-type core). In those apparatus...

...Dennis Albert; Lukas Daniel Domenig; Philipp Schachinger; Klaus Roppert; Herwig Renner Purpose The purpose of this paper is to investigate the applicability of a direct current (DC) hysteresis measurement on power transformer terminals for the subsequent hysteresis model parametrization...

... in particular volumes of the two-transformer set of the phase shifter enabled acceptable accuracy in calculations of the basic exploitation parameters of the phase shifter. Research limitations/implications The developed methodology allows the analysis of the exploitation conditions of two separated...

...Houssam Ichou; Daniel Roger; Mathieu Rossi Purpose This paper aims to propose a new design for high-power compact solid-state transformers (SSTs) made with grain-oriented electrical steel (GOES) wound cores that benefit from the natural reduction of iron losses at high temperatures. Design...

...Reza Behkam; Hossein Karami; Mehdi Salay Naderi; Gevork B. Gharehpetian Purpose This study aims to use frequency response analysis, a powerful tool to detect the location and types of transformer winding faults. Proposing an effective intelligent approach for interpreting the frequency responses...

...Abdallah Chanane; Messaoud Belazzoug Purpose It is not a secret that the identification of the high-frequency ladder network model (LNM) parameters for the transformer winding is a crucial task. This paper aims to present the application of one of the latest swarm intelligence algorithms, namely...

...Stéphane Duchesne; Fabrice Morganti; Carl Shulz; Daniel Roger Purpose This study presents a new method for the detection of faults in large transformer cores. It is based on the analysis of leakage flux components in the vicinity of the sheet stack. The purpose of this study is to provide...

... 3D modeling Transformers Resistance Inductance The conductor cross-sections for analyzed case studies are modified from a circular shape (original geometry) to a polygonal shape to reduce the FE number and achieve easier computational convergence. These modification change both the cross...

...Vahid Ghorbanian; Mohammad Hossain Mohammadi; David Lowther Purpose This paper aims to propose a data-driven approach to determine the design guidelines for low-frequency electromagnetic devices. Design/methodology/approach Two different devices, a core-type single-phase transformer...

...Yahia Achour; Jacek Starzyński Purpose This paper aims to describe a new concept of transformer based on the displacement current. The paper shows how this idea can be translated into reality and presents an example of a working design. Design/methodology/approach The authors replace...

...Andrea Cremasco; Wei Wu; Andreas Blaszczyk; Bogdan Cranganu-Cretu Purpose The application of dry-type transformers is growing in the market because the technology is non-flammable, safer and environmentally friendly. However, the unit dimensions are normally larger and material costs become higher...

... of the structural steel that is used in the tank of oil filled power transformers, namely, the volumetric losses and the magnetic permeability, both in function of the density of magnetic flux. Although these data are not usually available, they are fundamental for helping the transformer designer in avoiding...

...Tohid Jalilzadeh; Mehrdad Tarafdar Hagh; Mehran Sabahi Purpose This paper aims to propose a new transformer-less inverter structure to reduce the common-mode leakage current in grid-connected photovoltaic (PV) systems. Design/methodology/approach The proposed circuit structure is the same...

...Patrick Dular; Patrick Kuo-Peng; Mauricio Valencia Ferreira da Luz; Laurent Krahenbuhl Purpose This paper aims to develop a methodology for progressive finite element (FE) modeling of transformers, from simple to complex models of both magnetic cores and windings. Design/methodology/approach...

... pot-core transformer approach, the rotor-side energizing of the excitation windings can be provided isolated and free of wear. Design/methodology/approach – For design purpose, an analytical model of the inductive link and the compensation network elements is shown. Based on a pot-core...

...Andrzej Demenko, Ivo Doležel, Kay Hameyer, Wojciech Pietrowski and Krzysztof Zawirski; Andrzej Wilk Purpose – The paper presents a mathematical model for the hysteresis phenomenon in a multi-winding single-phase core type transformer. The set of loop differential equations was developed...