M.Sc Benedikt Kohlhepp

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Arbeitsgebiet

• Elektromagnetische Verträglichkeit von Antriebsumrichtern
• Leistungselektronik von Antriebsumrichtern mit schnellschaltenden Halbleitern
  

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Laufende Arbeiten

• EMV-Untersuchung eines ZVS-Umrichters mit GaN-Leistungshalbleitern
  

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Abgeschlossene Arbeiten

• Untersuchung leitungsgeführter Störungen eines Umrichters mit GaN-HEMTs
• Untersuchung eines Modulationsverfahrens zu Reduzierung der Flankensteilheit in Umrichtern
• Untersuchung eines aktiven du/dt-Filters für einen GaN-Umrichter
• Simulation von Halbbrücken-Kommutierungskreisen auf Leiterplatten mit GaN-Bauelementen
• Untersuchung und Modellierung von EMV-Filtern für leistungselektronische Schaltungen
• Untersuchung eines 3-Phasen-Umrichters basierend auf Nullspannungsschalten und GaN-Leistugshalbleitern
• Untersuchung eines DC-DC-Konverters auf Basis von GaN-HEMTs zur Speisung eines Batteriespeichers aus PV-Anlagen
• Untersuchung eines Inverters mit variabler Schaltfrequenz auf Basis von GaN-Leistungshalbleitern
• Untersuchung eines ZVS-Umrichters auf Basis von GaN-Leistungshalbleitern
• Untersuchungen zur Ansteuerung eines 2-Level Pulswechselrichters mit GaN-Leistungshalbleitern
• Untersuchung eines Messaufbaus zur Charakterisierung von induktiven Komponenten auf Basis von Wide-Bandgap-Halbleitern
• Untersuchung der asymmetrischen Halbbrücke auf Basis von GaN-Leistungshalbleitern unter Berücksichtigung parasitärer Elemente
• Untersuchung einer Hystereseregelung für einen GaN-Umrichter im variabelfrequenten Betrieb
• Untersuchung eines 3-phasigen Umrichters mit ZVS
  

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Vorträge

• „Herausforderungen beim Einsatz von GaN-Leistungshalbleitern in modernen Umrichtern“ – Cluster Seminar & Workshop, 12.03.2020 in Aschaffenburg

• „Messung von Schaltverlusten bei Wide Bandgap Halbleitern – Ein thermischer Ansatz “ – Cluster Online-Seminar “Echtzeitanalyse und Messtechnik in der elektrischen Antriebstechnik sowie in der Leistungselektronik”, 09.03.2021
  

• „Messgeräte unter Störeinfluss“ – Cluster Online-Seminar “Echtzeitanalyse und Messtechnik in der elektrischen Antriebstechnik sowie in der Leistungselektronik”, 10.03.2022
• „Loss measurement of magnetic components“ – ECPE Workshop “Design, Technology, Simulation and Application Aspects of Magnetic Components in PE ”, 22.-23.09.2022

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Auszeichnungen

• EPE Young Author Best Paper Award 2021 für das Paper „Detailed Simulation Model of an Asymmetrical Half-Bridge PWM Converter with Synchronous Rectification including Parasitic Elements”, Benedikt Kohlhepp, Markus Barwig, Thomas Dürbaum and Valentin Zeller, Friedrich-Alexander University, Erlangen-Nürnberg, Germany

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Veröffentlichungen

 

DOI: 10.1016

Kohlhepp B., Faber S., Kaiser J., Dürbaum T.:
Study on Commutation Loop Inductance and Current Distribution to DC-link Capacitors in a GaN Half-bridge
24th European Conference on Power Electronics and Applications, EPE 2022 ECCE Europe (Hannover, 5. September 2022 - 9. September 2022)
In: 24th European Conference on Power Electronics and Applications, EPE 2022 ECCE Europe 2022

Kohlhepp B., Faber S., Kaiser J., Kübrich D., Dürbaum T.:
Extraction of Parasitic Elements of a Printed Circuit Board applied to a GaN Half-Bridge
International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2022 (Nuremberg, DEU, 10. Mai 2022 - 12. Mai 2022)
In: PCIM Europe Conference Proceedings 2022
DOI: 10.30420/565822168

Kohlhepp B., Kübrich D., Dürbaum T.:
GaN-HEMT Based Test Setup for Measurement of Core Losses Under DC-Bias
12th International Conference on Integrated Power Electronics Systems, CIPS 2022 (Berlin, DEU, 15. März 2022 - 17. März 2022)
In: ETG-Fachbericht 2022

Kohlhepp B., Lutsch M., Dürbaum T.:
Three-Phase ZVS Inverter with Variable and Fixed Frequency Operation based on GaN Semiconductors
24th European Conference on Power Electronics and Applications, EPE 2022 ECCE Europe (Hannover, 5. September 2022 - 9. September 2022)
In: 24th European Conference on Power Electronics and Applications, EPE 2022 ECCE Europe 2022

2021

• Dobusch J., Schwanninger R., Kohlhepp B., Dürbaum T.:
  How to choose the optimal gan-hemt for a hard switching application – a guide
  2021 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2021 (Virtual, Online, 3. Mai 2021 - 7. Mai 2021)
  In: PCIM Europe Conference Proceedings 2021
• Kohlhepp B., Dürbaum T.:
  Modulation Strategy Comprising TCM with Frequency Limit and DPWM for Fast Switching GaN-Inverters
  In: 2021 IEEE 8th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) 2021
  DOI: 10.1109/WiPDA49284.2021.9645127
• Kohlhepp B., Dürbaum T.:
  Novel DPWM modulation scheme for three-phase ZVS inverters
  56th International Universities Power Engineering Conference, UPEC 2021 (Virtual, Middlesbrough, GBR, 31. August 2021 - 3. September 2021)
  In: 2021 56th International Universities Power Engineering Conference: Powering Net Zero Emissions, UPEC 2021 - Proceedings 2021
  DOI: 10.1109/UPEC50034.2021.9548210
• Kohlhepp B., Förster T., Dürbaum T.:
  High frequency ZVS GaN-inverter with adaptive dead time
  56th International Universities Power Engineering Conference, UPEC 2021 (Virtual, Middlesbrough, GBR, 31. August 2021 - 3. September 2021)
  In: 2021 56th International Universities Power Engineering Conference: Powering Net Zero Emissions, UPEC 2021 - Proceedings 2021
  DOI: 10.1109/UPEC50034.2021.9548249
• Kohlhepp B., Kübrich D., Dürbaum T.:
  Switching Loss Measurement-A Thermal Approach Applied to GaN-Half-Bridge Configuration
  23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe
  URL: https://www.scopus.com/record/display.uri?eid=2-s2.0-85119039332&origin=inward
• Kohlhepp B., Kübrich D., Peller S., Dürbaum T.:
  Test setup using DC metering approach for loss measurements of inductive components – principle, characterization, validation and application
  In: Iet Power Electronics (2021)
  ISSN: 1755-4535
  DOI: 10.1049/pel2.12155
• Kohlhepp B., Kübrich D., Schwanninger R., Dürbaum T.:
  Switching loss estimation of gan-hemts by thermal measurement procedure
  2021 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2021 (Virtual, Online, 3. Mai 2021 - 7. Mai 2021)
  In: PCIM Europe Conference Proceedings 2021
• Kohlhepp B., Kübrich D., Tannhaeuser M., Dürbaum T.:
  Modulation Method to Reduce Losses in Inverters with LC-Filters
  23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe
  URL: https://www.scopus.com/record/display.uri?eid=2-s2.0-85116643341&origin=inward
• Kohlhepp B., Zeller V., Dürbaum T.:
  Full gan asymmetrical half-bridge pwm converter with synchronous rectifier for a high efficient 90 W laptop charger
  2021 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2021 (Virtual, 3. Mai 2021 - 7. Mai 2021)
  In: PCIM Europe Conference Proceedings 2021

2020

• Kohlhepp B., Barwig M., Kübrich D., Roßmanith H., Dürbaum T.:
  Inductor design considerations for overload conditions of lc-filters in high frequency gan-inverters
  International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2020 (Virtual, Online, 7. Juli 2020 - 8. Juli 2020)
  In: PCIM Europe Conference Proceedings 2020
• Kohlhepp B., Kuring C., Peller S., Kübrich D.:
  Measurement of Dynamic On-State Resistance of High-Voltage GaN-HEMTs under Real Application Conditions
  22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe) (Lyon, France, 7. September 2020 - 11. September 2020)
  DOI: 10.23919/EPE20ECCEEurope43536.2020.9215744
• Kohlhepp B., Kübrich D., Dürbaum T.:
  Experimental Study of the Coss-Losses Occurring During ZVS Transitions – Emphasis on Low and High Voltage GaN-HEMTs
  11th International Conference on Integrated Power Electronics Systems (CIPS 2020) (Berlin, 24. März 2020 - 26. März 2020)
  In: VDE (Hrsg.): CIPS 2020 2020
• Kohlhepp B., Kübrich D., Tannhaeuser M., Dürbaum T.:
  Adaptive dead time in high frequency GaN-Inverters with LC output filter
  10th International Conference on Power Electronics, Machines and Drives, PEMD 2020
  DOI: 10.1049/icp.2021.0977
• Kohlhepp B., Kübrich D., Tannhauser M., Hoffmann A., Dürbaum T.:
  Test Setup for Dynamic ON-State Resistance Measurement of High- And Low-Voltage GaN-HEMTs under Hard and Soft Switching Operations
  In: IEEE Transactions on Instrumentation and Measurement 69 (2020), S. 7740-7751
  ISSN: 0018-9456
  DOI: 10.1109/TIM.2020.2985186
• Kohlhepp B., Lanvermann T., Dürbaum T.:
  Method for compensating the effects of gan-hemts on the output voltage in inverters during dead time
  International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2020 (Virtual, Online, 7. Juli 2020 - 8. Juli 2020)
  In: PCIM Europe Conference Proceedings 2020
• Kohlhepp B., Peller S., Kübrich D., Dürbaum T.:
  Test Setup for Loss Measurements of Inductive Components by using GaN-HEMTs
  21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020 (Aalborg, 9. November 2020 - 12. November 2020)
  In: 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020 2020
  DOI: 10.1109/COMPEL49091.2020.9265698
• Kohlhepp B., Zeller V., Barwig M., Dürbaum T.:
  Detailed Simulation Model of an Asymmetrical Half-Bridge PWM Converter with Synchronous Rectification including Parasitic Elements
  22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe (Lyon, 7. September 2020 - 11. September 2020)
  In: 2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe 2020
  DOI: 10.23919/EPE20ECCEEurope43536.2020.9215674
• Stenglein E., Kohlhepp B., Kübrich D., Albach M., Dürbaum T.:
  GaN-Half-Bridge for Core Loss Measurements under Rectangular AC Voltage and DC Bias of the Magnetic Flux Density
  In: IEEE Transactions on Instrumentation and Measurement 69 (2020), S. 6312-6321
  ISSN: 0018-9456
  DOI: 10.1109/TIM.2020.2972140
• Stenglein E., Kohlhepp B., Kübrich D., Albach M., Dürbaum T.:
  Novel gan half-bridge configuration for the measurement of core losses under rectangular voltages and DC-bias
  International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2020 (Online, 7. Juli 2020 - 8. Juli 2020)
  In: PCIM Europe Conference Proceedings 2020
  URL: https://ieeexplore.ieee.org/document/9178103

2019

• Kohlhepp B., Barwig M., Dürbaum T.:
  GaN Improves Efficiency of an Asymmetrical Half-Bridge PWM Converter with Synchronous Rectifier
  International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2019) (Nürnberg, 7. Mai 2019 - 9. Mai 2019)
  In: VDE (Hrsg.): PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management 2019
• Kohlhepp B., Barwig M., Dürbaum T.:
  Influence of the Rectifier's Output Capacitance on the ZVS Transition in Asymmetrical Half-Bridge PWM Converters
  10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia (Busan, 27. Mai 2019 - 30. Mai 2019)
  In: ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia 2019
• Kohlhepp B., Kübrich D., Dürbaum T.:
  Measuring and Modeling of Dynamic On-State Resistance of GaN-HEMTs
  21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe (Genova, 3. September 2019 - 5. September 2019)
  In: 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe 2019
  DOI: 10.23919/EPE.2019.8915553
• Kohlhepp B., Kübrich D., Dürbaum T., Tannhaeuser M., Hoffmann A.:
  Measuring of Dynamic On-State Resistance of GaN-HEMTs in Half-Bridge Application under Hard and Soft Switching Operation
  IEEE Electrical Power and Energy Conference (EPEC) (Montreal)
  In: 2019 IEEE ELECTRICAL POWER AND ENERGY CONFERENCE (EPEC), NEW YORK: 2019
  DOI: 10.1109/epec47565.2019.9074792

2018

• Kohlhepp B., Barwig M., Dürbaum T.:
  Efficiency Comparison of an Asymmetrical Half-Bridge PWM Converter with Schottky and Synchronous Rectification
  53rd International Universities Power Engineering Conference, UPEC 2018
  DOI: 10.1109/UPEC.2018.8542033
• Kohlhepp B., Barwig M., Dürbaum T.:
  Improving Efficiency of an Asymmetrical Half-Bridge PWM Converter with Synchronous Rectification by a Modified Design Process
  10th International Conference and Expositions on Electrical And Power Engineering, EPE 2018
  DOI: 10.1109/ICEPE.2018.8559836
• Kohlhepp B., Göttle J., Schmidt E., Dürbaum T.:
  A Novel Combination of Algorithms for Accelerated Convergence to Steady-State
  PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (Nürnberg, 5. Juni 2018 - 7. Juni 2018)
  In: VDE (Hrsg.): PCIM Europe 2018 2018