A5007989231- Power Transformer Diagnostics and Insulation
- Lightning and Electromagnetic Phenomena
- Magnetic Properties and Applications
- Fault Detection and Control Systems
- Wireless Body Area Networks
- Electromagnetic Compatibility and Noise Suppression
- Wireless Power Transfer Systems
- Energy Harvesting in Wireless Networks
- High voltage insulation and dielectric phenomena
- Induction Heating and Inverter Technology
- Neuroscience and Neuropharmacology Research
- Cardiac electrophysiology and arrhythmias
- Real-time simulation and control systems
- Pulsed Power Technology Applications
- Electromagnetic Launch and Propulsion Technology
Ostschweizer Fachhochschule OST
2015-2022
University of Applied Sciences Rapperswil
2016-2019
Karlsruhe Institute of Technology
2003
This paper presents a numerical method for calculating the resistance, inductance, and capacitance matrices of transformer windings. Importance their precise calculation is shown in simulation voltage distribution over windings lightning-impulse test. The results obtained frequency domain analysis are good agreement with measurement data. All parameters calculated using self-developed solvers, theory novelty which described this paper. presented approach allows fast accurate high-frequency modeling
Electromagnetic modeling of transformers is paramount importance for the prediction transient behavior entire system during atmospheric overvoltages and switching transients. Time domain simulations measurements have been performed to model dry-type under in different configurations. This analysis developed method allow investigations possible means protection (or their redundancy) transformer against uncommon transients experienced real circumstances that might exceed dielectric stresses...
Modeling details of frequency dependent parameters and a method for taking those into account in time domain high (HF) transformer simulations are presented. Frequency turn resistance core losses considered. The suggested is general thus not limited only to the considered parameters. obtained by performing (FD) finite element (FEM) simulations. dependences approximated set functions with existing Inverse Fourier Transform (IFT) used convolution integrals model winding system. simulation...
This paper presents the methodology and validation of high-frequency (HF) transformer simulations, which take into account frequency dependence winding resistances inductances. The parameters' is approximated by curve fitting values computed finite element method (FEM) simulations in domain. After inverse Fourier transformation time domain, convolution integrals are solved efficiently trapezoidal integration rule. simulation results validated using measurement data.
In this paper, a comprehensive design procedure for high voltage pulse power transformers is presented. The based on the finite element method (FEM) and contains an electrical model, magnetical thermal model of transformer isolation design. addition, to avoid overvoltages within winding, dynamic distribution included in approach, as well. For validation models procedure, prototype has been built. There, main focus evaluating parasitics, which are crucial shape output pulse. Further, will be...
We describe a wireless power transfer (WPT) system for linear drives based on inductive resonant coupling. The is capable of continuously transmitting from the transmitter to receiver coil, independent its motion or position. paper proposes solution and presents rigorous analysis by means 2-D 3-D FEM simulations. simulations are combined in order compute parameters coupling coils. obtained solutions further optimized Matlab connecting an optimization algorithm Linear Regression with circuit...
Electromagnetic (EM) modeling of transformers is crucial for the prediction critical behavior (short-circuit, overvoltage etc.) entire system. Time domain simulations and measurements have been performed in order to model dry-type under transient overvoltages Common Differential Mode configurations. This analysis developed method allow investigations possible means protection (or their redundancy) transformer against uncommon transients experienced real circumstances that might exceed...
This study deals with a mathematical model of the cellular action potential its underlying ionic currents in human myocardium based upon Luo-Rudy phase II cell model. The activation process is calculated within three dimensional heart model, taking into account behaviour each single membrane. propagation simulated using Finite Difference Method time domain. potentials on epicardium are mapped finite element torso. 300 sources surface forward. These simulations give an idea how different...