TY  - JOUR
A1  - Himmelstoss, Felix
T1  - Design of State-Space Controllers with the Help of Signal Flow Graphs Shown for a Buck Converter
JF  - WSEAS Transactions on Power Systems, Volume 21, 2022, pp. 421-429
KW  - DC/DC converter
KW  - Buck converter
KW  - modelling
KW  - simulation
KW  - state space controller
Y1  - 
U6  - http://dx.doi.org/10.37394/23202.2022.21.46
VL  - Volume 21
SP  - 421
EP  - 429
ER  - 
TY  - JOUR
A1  - Himmelstoss, Felix
A1  - Votzi, Helmut
T1  - Simple Chargers for a Small DC Micro-Grid for a Home Emergency Power System
JF  - Electricity
KW  - micro-grid
KW  - Buck converter
KW  - Boost converter
KW  - hysteresis control
Y1  - 
U6  - http://dx.doi.org/https://doi.org/10.3390/electricity4030013
VL  - 4
IS  - 3
SP  - 216
EP  - 234
ER  - 
TY  - JOUR
A1  - Himmelstoss, Felix
T1  - Quasi Resonant Zero Current Switching Modified Boost Converter (QRZCSMBC)
JF  - WSEAS Transactions on Power Systems
KW  - DC/DC converter
KW  - modified boost converter
KW  - inrush current
KW  - zero current switching ZCS
KW  - simulation
Y1  - 
U6  - http://dx.doi.org/10.37394/23201.2023.22.8
VL  - Volume 22
SP  - 55
EP  - 62
ER  - 
TY  - JOUR
A1  - Himmelstoss, Felix
T1  - Third order converters with current output for driving LEDs
JF  - WSEAS Transactions on Power Systems
KW  - DC/DC converters
KW  - current output
KW  - limited duty cycle converter
KW  - simulation
KW  - modeling
Y1  - 
U6  - http://dx.doi.org/10.37394/232016.2022.17.40
VL  - Volume 17
SP  - 402
EP  - 409
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Windisch, Michael
T1  - A capacitor-free driving stage for light emitting diodes
T2  - 21th International Conference on Renewable Energies and Power Quality (ICREPQ’23) Madrid (Spain), 24th to 26th May 2023
N2  - Electrolytic capacitors have the disadvantage of
pronounced aging. Non-electrolytic capacitors are therefore used
in applications where long-life is important. In this paper we
present a driving stage for LEDs without any capacitive
elements. The basic topology is a Buck converter with one coil,
one active, and one passive switch. Instead of the output
capacitor, series connections of one or more LEDs and an active
switch are connected. An additional diode is connected between
the output and the input to achieve a current path, when all LED-
paths are off. A nonlinear hysteresis controller is used to achieve
a robust control. A system with three switchable LED-strings is
analyzed. Design hints are given and the function is proved with
the help of LTSpice simulations. The system can be used for
lighting purposes with the possibility to change the chrominance.
The potentiality to transmit data is also treated.
KW  - DC-to-DC converter
KW  - stray inductance
KW  - recuperation
KW  - active snubber
Y1  - 
U6  - http://dx.doi.org/10.24084/repqj21.278
VL  - Vol. 21
SP  - 220
EP  - 225
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Windisch, Michael
T1  - Tapped inductor Boost with exploitation of the stray energy
T2  - Proceedings of 2022 IEEE 20th International Power Electronics and Motion Control Conference (PEMC 2022), Brasov, Rumania, Sep. 25-29
N2  - Tapped inductor DC-to-DC converters are interesting circuits, the winding ratio of the two windings mounted on the same core change the voltage transformation ratio compared to the untapped inductor. The tapped inductor converters are especially useful, when high or low voltage transformation ratios have to be realized. The disadvantage of this concept is that the coupling between the two windings is not total and can be described by the stray or leakage inductance. This stray inductance leads to a high overvoltage at the active switch, and therefore also across other elements of the converter. After a short summery of the ideal tapped Boost converter, the design of an RCD snubber which limits the overvoltage is explained. To improve the efficiency of the converter two active snubber networks are treated, which feed the energy stored in the snubber capacitor into the input source or into the output circuit. Simulations are used to prove these considerations.
KW  - DC/DC converter
KW  - stray inductance
KW  - recuperation
KW  - active snubber
Y1  - 
U6  - http://dx.doi.org/10.1109/PEMC51159.2022.9962849
SP  - 75
EP  - 80
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Votzi, Helmut
T1  - Two-Stage Step-up Converter with Different Voltage Transformation Ratios depending on the Duty Cycle
T2  - 20th International Conference on Renewable Energies and Power Quality (ICREPQ’22) Vigo (Spain), 27th to 29th July 2022
N2  - A two-stage converter with high output voltage
ratio and reduced current stress of the inductors and partly
reduced voltage stress is discussed. The function is explained
with the help of voltage and current diagrams. The voltage
transformation ratio changes between a quadratic step-up for
duty cycles lower 0.5 and a double Boost converter for duty
cycles higher than 0.5. Dimensioning hints, the control law for
feed-forward controls, the transient when the supply is turned on
is discussed and some simulations are given. A comparison to
other two-stage converters is also treated.
KW  - Quadratic boost
KW  - double boost converter
KW  - feed-forward control
KW  - start-up
Y1  - 
U6  - http://dx.doi.org/10.24084/repqj20.218
VL  - Vol. 20
SP  - 66
ER  - 
TY  - CHAP
A1  - Fibich, Christian
A1  - Horauer, Martin
A1  - Obermaisser, Roman
T1  - Bitstream-Level Interconnect Fault Characterization for SRAM-based FPGAs
T2  - Proceedings of the 2023 Design, Automation & Test in Europe Conference & Exhibition (DATE 2023), pp. 1-2, 16-18 April 2023, Antwerp, Belgium
KW  - FPGA
KW  - Fault Injection
KW  - Interconnect Fault
Y1  - 
U6  - http://dx.doi.org/10.23919/DATE56975.2023.10136911
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Hofschweiger, Andreas
A1  - Votzi, Helmut
T1  - Quadratic Combined Forward-Flyback Converter
T2  - Power Conversion and Intelligent Motion Conference (PCIM) 2023, May 9-11, 2023 Nurenberg, Germany
KW  - DC/DC converter
KW  - quadratic converter
KW  - forward
KW  - flyback
Y1  - 
U6  - http://dx.doi.org/10.30420/566091315
SP  - 1446
EP  - 1453
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Ertl, Benjamin
A1  - Votzi, Helmut
T1  - A new limited duty cycle step-up converter
T2  - International European Conference on Interdisciplinary Scientific Research, July 13-15, 2023, Rome, Italy
KW  - DC/DC converter
KW  - step-up converter
KW  - DC-grid
KW  - modeling
KW  - simulation
Y1  - 
SP  - 811
EP  - 833
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Edelmoser, Karl
T1  - Liquid and surface disinfection with pulsed UVC LEDs
T2  - 2nd Ahi Evran International Conference on Scientific Research, Kirshehir, Turkey, October 21-23, 2022
KW  - disinfection
KW  - light emitting diode
KW  - ultraviolet UV light
KW  - pulsed power
KW  - DC/DC Converter
Y1  - 
SP  - 654
EP  - 664
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
A1  - Yaman, Ferhat
A1  - Edelmoser, Karl
T1  - Building block for a spot welder
T2  - International Congress on Innovation Technologies & Engineering, Sept. 2-4, 2022, Izmir, Turkey, pp. 139-148
KW  - spot welding
KW  - capacitor charging
KW  - pulse power
KW  - retrofit
Y1  - 
SP  - 139
EP  - 148
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
T1  - Concept to change the voltage transformation ratio of a DC/DC converter
T2  - Cukurova 9th International Scientific Researches Conference, Oct. 9-11, 2022, Adana, Turkey, pp. 258-273
KW  - DC/DC converter
KW  - AC-Switch
KW  - voltage transformation ratio
KW  - modeling
KW  - simulation
Y1  - 
SP  - 258
EP  - 273
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
T1  - Three DC/DC Converters with continuous input and output current for LED applications
T2  - International Conference on Engineering Sciences ICES, Baku, Azerbeijan, Nov. 11-12, 2022
KW  - DC/DC converter
KW  - current control
KW  - efficiency
KW  - lighting
Y1  - 
SP  - 335
EP  - 347
ER  - 
TY  - CHAP
A1  - Stohanzl, Martin
A1  - Kubinger, Wilfried
T1  - Low-Cost Multispectral Camera Array with Image Registration
T2  - Proceedings of the Austrian Robotics Workshop 2023, p. 146, 12-13 April, 2023, Linz, Austria
KW  - Multicamera
KW  - Multispectral
KW  - Calibration
Y1  - 
SP  - 146
EP  - 146
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
T1  - Modified Boost Converter with additional Boehringer network
T2  - 10th International Zeugma Conference on Scientific Research, June 25-26, 2023, Gaziantep, Turkey, pp. 404-411
KW  - DC/DC converter
KW  - modified boost converter
KW  - switching loss
KW  - loss reduction
KW  - EMC
Y1  - 
SP  - 404
EP  - 411
ER  - 
TY  - CHAP
A1  - Himmelstoss, Felix
T1  - High Step-Up Converter with Continuous Input and Output Current
T2  - 5th International Ankara Multidisciplinary Studies Congress, Ankara, Turkey, Jan. 27-29, 2023
KW  - power converter
KW  - DC/DC converter
KW  - LED supply
KW  - modeling
KW  - control
Y1  - 
SP  - 978
EP  - 989
ER  - 
TY  - CHAP
A1  - Dziech, Andrzej
A1  - Wassermann, Jakob
A1  - Windisch, Michael
A1  - Baran, Remigiusz
A1  - Wojniak, Jakub
A1  - Domin, Pawel
T1  - Automatic classification of a full-thickness macular hole in optical coherence tomography images
T2  - Proceedings of the International Conference on Circuits, Systems, Communications and Computers, Rhodes, Greece, July 19-22, 2023
KW  - OCT
KW  - full-thickness macular hole
KW  - automatic classification
KW  - retinal segmentation
Y1  - 
ER  -