Thesis supervisor: Viktor Józsa
Location of studies (in Hungarian): Department of Energy Engineering Abbreviation of location of studies: EGR
Description of the research topic:
a.) Preliminaries:
Electrification of passenger vehicles significantly contributes to the reduction of fossil fuel consumption in the transportation sector and air quality improvement in urban areas. A critical element of the drivetrain of battery electric vehicles is the inverter that performs the DC/AC conversion. The current thermal challenges are sufficiently wide operating conditions, efficient operation, minimizing maintenance, and advanced temperature management and control.
b.) Aim of research:
Extensive measurement and testing of an existing automotive inverter and creation of its thermal digital twin in Matlab (Simulink or Simscape) software environment. Detailed thermal analysis of the critical components in finite element software (e.g., ANSYS Workbench). Identifying the thermally limiting parts and suggesting design improvements to eliminate the bottlenecks using passive or active thermal management solutions, also considering their cost and maintenance requirements. This research aims to introduce thermal solutions to the existing automotive inverters to allow for more flexible operation while keeping the design simple and robust.
c.) Tasks, main items, necessary time:
Literature survey on automotive inverter modeling, measurements, and thermal design challenges (1 year). Performing measurements and laboratory work (1 year). Concentrated parameter modeling of the system and finite element simulation of the critical parts (1 year). Writing papers (0.5 years) and the thesis (0.5 years). Most of the tasks can be performed in parallel.
d.) Required equipment:
Computer, automotive inverter, measurement system, software. The Robert Bosch Kft. will provide the inverter and the measurement system. The software is available at the BME.
e.) Expected scientific results:
New design guidelines to efficient and robust inverter thermal design that fosters the spreading of affordable and reliable electric vehicles.
f.) References:
[1] Füzesi, Dániel; Malý, Milan; Jedelský, Jan; Józsa, Viktor: Numerical modeling of distributed combustion without air dilution in a novel ultra-low emission turbulent swirl burner, PHYSICS OF FLUIDS 34: 4 Paper: 043311, 13 p. (2022)
[2] Józsa, Viktor; Kovács, Róbert: Solving Problems in Thermal Engineering: A Toolbox for Engineersm Cham, Svájc : Springer-Verlag (2020) , 203 p.
[3] Kovacs, Róbert; Jozsa, Viktor: Thermal analysis of the SMOG-1 PocketQube satellite, APPLIED THERMAL ENGINEERING 139 pp. 506-513. , 8 p. (2018)
[4] Urbán, András; Groniewsky, Axel; Malý, Milan; Józsa, Viktor; Jedelský, Jan: Application of big data analysis technique on high-velocity airblast atomization: Searching for optimum probability density function, FUEL 273 Paper: 117792, 12 p. (2020)
Required language skills: English Number of students who can be accepted: 1
Deadline for application: 2024-04-23
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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