Doctoral theses of the School of Engineering at Aaltodoc (external link)
Doctoral theses of the School of Engineering are available in the open access repository maintained by Aalto, Aaltodoc.
Public defence, Mechatronics, M.Sc. Topias Tyni
Enhancing Electric Loader Efficiency Motor Downsizing and System Integration. Public defence from the Aalto University School of Engineering, Energy and Mechanical Engineering Department.
When
–
Where
Lecture Hall 216, Otakaari 4, K1 Building, 02150 Espoo
Event language(s)
English
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Title of the thesis: Enhancing Electric Loader Efficiency Motor Downsizing and System Integration
Thesis defender: Topias Tyni
Opponent: Prof. Marcus Geimer, Karlsruhe Institute of Technology, Germany
Custos: Prof. Petri Kuosmanen, Aalto University School of Engineering
The doctoral research examines new solutions for electrified powertrains in heavy mobile machinery, particularly wheel loaders and mining loaders. The problem studied is how to transition cost‑effectively from diesel toward hybrid and electric powertrain systems in a way that maintains productivity while improving energy efficiency.
The research aims to identify solutions that allow smaller components to be used in these machines and improve overall efficiency. It develops and evaluates two solutions in which the electric motors used to move the machine and operate the bucket can work together to move the machine. In the first solution, the motors are connected mechanically. In the second, they are connected through hydraulics. The solutions are analyzed using simulations that make use of recorded wheel loader operation, as well as real time simulation models and a virtual environment. The results are compared with a system in which the electric motors operate separately.
The research shows that the mechanical solution significantly reduces the power required from the drive motor during loading. The mining loader also achieves the same productivity as the comparison system, even though its drive motor is more than 30% smaller. The drawback of the mechanical connection is a slight increase in energy consumption. In a simulation of wheel loader operation, the hydraulic solution reduces energy consumption by approximately 10% compared with the reference system when a new operating mode is used. Both solutions enable more effective use of the electric motors and improve the loader’s overall efficiency.
Thesis available for public display 7 days prior to the defence at Aalto University's public display page.
Contact information: topias.tyni@aalto.fi
Doctoral theses of the School of Engineering
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