Johann W. Kolar

49.3k total citations · 12 hit papers
925 papers, 40.2k citations indexed

About

Johann W. Kolar is a scholar working on Electrical and Electronic Engineering, Control and Systems Engineering and Mechanical Engineering. According to data from OpenAlex, Johann W. Kolar has authored 925 papers receiving a total of 40.2k indexed citations (citations by other indexed papers that have themselves been cited), including 848 papers in Electrical and Electronic Engineering, 242 papers in Control and Systems Engineering and 161 papers in Mechanical Engineering. Recurrent topics in Johann W. Kolar's work include Advanced DC-DC Converters (519 papers), Multilevel Inverters and Converters (395 papers) and Silicon Carbide Semiconductor Technologies (338 papers). Johann W. Kolar is often cited by papers focused on Advanced DC-DC Converters (519 papers), Multilevel Inverters and Converters (395 papers) and Silicon Carbide Semiconductor Technologies (338 papers). Johann W. Kolar collaborates with scholars based in Switzerland, Austria and Germany. Johann W. Kolar's co-authors include J. Biela, Thomas Friedli, Florian Krismer, Dominik Bortis, S.D. Round, Mario Schweizer, Jonas Huber, Franz Zach, H. Ertl and Uwe Drofenik and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of Applied Physics and IEEE Transactions on Industrial Electronics.

In The Last Decade

Johann W. Kolar

910 papers receiving 38.6k citations

Hit Papers

Design and Implementation of a Hi... 1991 2026 2002 2014 2012 2008 2010 2012 2011 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Design and Implementation of a Highly Efficient Three-Level T-Type Converter for Low-Voltage Applications
    2012 807 citations Johann W. Kolar et al. IEEE Transactions on Power Electronics profile →
  2. An Isolated Three-Port Bidirectional DC-DC Converter With Decoupled Power Flow Management
    2008 719 citations S.D. Round, Johann W. Kolar et al. IEEE Transactions on Power Electronics profile →
  3. SiC versus Si—Evaluation of Potentials for Performance Improvement of Inverter and DC–DC Converter Systems by SiC Power Semiconductors
    2010 688 citations J. Biela, Johann W. Kolar et al. profile →
  4. The Essence of Three-Phase PFC Rectifier Systems—Part I
    2012 613 citations Johann W. Kolar, Thomas Friedli IEEE Transactions on Power Electronics profile →
  5. Efficiency-Optimized High-Current Dual Active Bridge Converter for Automotive Applications
    2011 608 citations Johann W. Kolar et al. profile →
  6. Closed Form Solution for Minimum Conduction Loss Modulation of DAB Converters
    2011 502 citations Johann W. Kolar et al. IEEE Transactions on Power Electronics profile →
  7. Review of Three-Phase PWM AC–AC Converter Topologies
    2011 450 citations Johann W. Kolar, Thomas Friedli et al. profile →
  8. Influence of the modulation method on the conduction and switching losses of a PWM converter system
    1991 439 citations Johann W. Kolar et al. profile →
  9. Accurate Power Loss Model Derivation of a High-Current Dual Active Bridge Converter for an Automotive Application
    2009 394 citations Johann W. Kolar et al. profile →
  10. The Essence of Three-Phase PFC Rectifier Systems—Part II
    2013 363 citations Thomas Friedli, Johann W. Kolar et al. IEEE Transactions on Power Electronics profile →
  11. Comparative Evaluation of Advanced Three-Phase Three-Level Inverter/Converter Topologies Against Two-Level Systems
    2012 360 citations Thomas Friedli, Johann W. Kolar et al. profile →
  12. Applicability of Solid-State Transformers in Today’s and Future Distribution Grids
    2017 352 citations Jonas Huber, Johann W. Kolar profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Johann W. Kolar Switzerland 98 38.1k 10.8k 6.1k 4.6k 1.8k 925 40.2k
Ali Emadi Canada 84 27.6k 0.7× 11.2k 1.0× 16.4k 2.7× 3.8k 0.8× 3.0k 1.7× 745 32.7k
K. T. Chau Hong Kong 70 17.1k 0.4× 9.4k 0.9× 4.7k 0.8× 2.8k 0.6× 3.7k 2.1× 574 19.6k
Rik W. De Doncker Germany 61 16.9k 0.4× 6.3k 0.6× 3.2k 0.5× 2.0k 0.4× 2.0k 1.1× 755 18.4k
Alex Q. Huang United States 73 21.9k 0.6× 7.5k 0.7× 2.4k 0.4× 1.1k 0.2× 731 0.4× 751 23.5k
Jih‐Sheng Lai United States 75 26.9k 0.7× 9.0k 0.8× 3.6k 0.6× 1.4k 0.3× 768 0.4× 509 27.8k
Dushan Boroyevich United States 80 27.5k 0.7× 12.6k 1.2× 2.0k 0.3× 1.4k 0.3× 554 0.3× 734 28.6k
S.Y.R. Hui Hong Kong 69 17.6k 0.5× 5.4k 0.5× 4.2k 0.7× 2.1k 0.5× 274 0.2× 559 19.0k
F.C. Lee United States 76 22.0k 0.6× 5.0k 0.5× 3.7k 0.6× 2.4k 0.5× 501 0.3× 402 22.5k
José Rodríguez Chile 102 62.1k 1.6× 31.5k 2.9× 2.9k 0.5× 1.9k 0.4× 539 0.3× 1.0k 64.6k
Dianguo Xu China 67 16.4k 0.4× 8.2k 0.8× 1.5k 0.3× 2.2k 0.5× 385 0.2× 1.1k 18.7k

Countries citing papers authored by Johann W. Kolar

Since Specialization
Citations

This map shows the geographic impact of Johann W. Kolar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Johann W. Kolar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Johann W. Kolar more than expected).

Fields of papers citing papers by Johann W. Kolar

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Johann W. Kolar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Johann W. Kolar. The network helps show where Johann W. Kolar may publish in the future.

Co-authorship network of co-authors of Johann W. Kolar

This figure shows the co-authorship network connecting the top 25 collaborators of Johann W. Kolar. A scholar is included among the top collaborators of Johann W. Kolar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Johann W. Kolar. Johann W. Kolar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Kolar, Johann W., et al.. (2024). Unraveling the Potential of Matrix Transformers in High-Current Low-Voltage Applications. 1–8. 1 indexed citations
3.
Anderson, Jon Azurza, et al.. (2023). All‐SiC 99.4%‐efficient three‐phase T‐type inverter with DC‐side common‐mode filter. Electronics Letters. 59(12). 6 indexed citations
4.
Menzi, David, S. Ben‐Yaakov, Grayson Zulauf, & Johann W. Kolar. (2023). ESR Modeling of Class II MLCC Large-Signal-Excitation Losses. IEEE Transactions on Power Electronics. 38(5). 5711–5715. 5 indexed citations
5.
Jayathurathnage, Prasad, Spasoje Mirić, Junzhong Xu, et al.. (2022). New Concept for Current-Impressed WPT to Multiple Independent Stainless-Steel-Enclosed Linear Actuator Sliders. Aaltodoc (Aalto University). 1–8. 2 indexed citations
6.
Haider, Michael, et al.. (2021). Analytical Calculation of the Residual ZVS Losses of TCM-Operated Single-Phase PFC Rectifiers. IEEE Open Journal of Power Electronics. 2. 250–264. 23 indexed citations
7.
Bortis, Dominik, et al.. (2020). Analysis of the Influence of Measurement Circuit Asymmetries on Three-Phase CM/DM Conducted EMI Separation. IEEE Transactions on Power Electronics. 36(4). 4066–4080. 10 indexed citations
8.
Zulauf, Grayson, Mattia Guacci, & Johann W. Kolar. (2019). Dynamic on-Resistance in GaN-on-Si HEMTs: Origins, Dependencies, and Future Characterization Frameworks. IEEE Transactions on Power Electronics. 35(6). 5581–5588. 94 indexed citations
9.
Kolar, Johann W. & Jonas Huber. (2018). The Essence of Solid-State Transformers. 1 indexed citations
10.
Tüysüz, Arda, et al.. (2018). Analysis and Modeling of Eddy-Current Couplings for Auxiliary Power Generation on a Freight Train Wagon. 5(4). 139–147. 8 indexed citations
11.
Kolar, Johann W.. (2015). Approaches to Overcome the Google Little-Box Challenges. International Telecommunications Energy Conference.
12.
Kasper, Matthias, et al.. (2013). PV Panel-Integrated High Step-up High Efficiency Isolated GaN DC-DC Boost Converter. International Telecommunications Energy Conference. 1–7. 21 indexed citations
13.
Bosshard, Roman, J. Mühlethaler, Johann W. Kolar, & I. Stevanović. (2012). The eta-alpha Pareto front of inductive power transfer coils. Infoscience (Ecole Polytechnique Fédérale de Lausanne). 4250–4257. 7 indexed citations
14.
Biela, J., Johann W. Kolar, Andrija Stupar, Uwe Drofenik, & A. Musing. (2010). Towards virtual prototyping and comprehensive multi-objective optimisation in power electronics. Repository for Publications and Research Data (ETH Zurich). 20 indexed citations
15.
Kolar, Johann W., Uwe Drofenik, J. Biela, et al.. (2008). PWM Converter Power Density Barriers. IEEJ Transactions on Industry Applications. 128(4). 468–480. 66 indexed citations
16.
Biela, J., Daniel Aggeler, Shigenori Inoue, Hirofumi Akagi, & Johann W. Kolar. (2008). Bi-Directional Isolated DC-DC Converter for Next-Generation Power Distribution-Comparison of Converters Using Si and SiC Devices. IEEJ Transactions on Industry Applications. 128(7). 901–909. 8 indexed citations
17.
Serpa, L. A. & Johann W. Kolar. (2008). Virtual-Flux Direct Power Control for Mains Connected Three-Level NPC Inverter Systems. IEEJ Transactions on Industry Applications. 128(4). 491–499. 4 indexed citations
18.
Biela, J. & Johann W. Kolar. (2008). Cooling Concepts for High Power Density Magnetic Devices. IEEJ Transactions on Industry Applications. 128(4). 500–507. 7 indexed citations
19.
Round, S.D., et al.. (2008). Towards a 30kW/liter, Three-Phase Unity Power Factor Rectifier. IEEJ Transactions on Industry Applications. 128(4). 481–490. 13 indexed citations
20.
Mino, Kazuaki, et al.. (2007). Novel Hybrid 12-Pulse Line-Interphase-Transformer Boost-Type Rectifier with Controlled Output Voltage and Sinusoidal Utility Currents. IEEJ Transactions on Industry Applications. 127(4). 382–390. 10 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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