Integrated hub gear motor for heavy-duty off-road working machines - interdisciplinary design
Montonen, Juho (2017-03-23)
Väitöskirja
Montonen, Juho
23.03.2017
Lappeenranta University of Technology
Acta Universitatis Lappeenrantaensis
Julkaisun pysyvä osoite on
https://urn.fi/URN:ISBN:978-952-335-053-3
https://urn.fi/URN:ISBN:978-952-335-053-3
Tiivistelmä
This doctoral dissertation studies solutions that meet the demands made for the propulsion
motors of off-road working machines. It has been shown that in a hybridization process,
without a mechanical gear, it is not possible to cover all the required torque-speed
operating points set by the driving conditions of the traditional off-road working machine
without largely overdimensioning the electrical components.
The dissertation presents a novel solution, which combines a two-step planetary gearbox
and a tooth-coil permanent magnet synchronous machine with embedded magnets to
solve the problem. The important boundary conditions in terms of the electromagnetic
design, mechanics, and cooling are discussed. The high design flexibility offered by
permanent magnet synchronous machines is utilized to the full to find a feasible integrated
design. Furthermore, the dissertation presents a solution for a gear change mechanism,
which is located inside an integrated electric motor gear assembly.
The designed and measured performance of the integrated system meets the needs of
many off-road working machines. The prototype motor has about 40 kW power and could
be adapted for instance on each wheel of a farming tractor, bucket loader, or harvester.
The same technology could also be used in on-road applications, such as buses or trucks,
intended for difficult terrains.
motors of off-road working machines. It has been shown that in a hybridization process,
without a mechanical gear, it is not possible to cover all the required torque-speed
operating points set by the driving conditions of the traditional off-road working machine
without largely overdimensioning the electrical components.
The dissertation presents a novel solution, which combines a two-step planetary gearbox
and a tooth-coil permanent magnet synchronous machine with embedded magnets to
solve the problem. The important boundary conditions in terms of the electromagnetic
design, mechanics, and cooling are discussed. The high design flexibility offered by
permanent magnet synchronous machines is utilized to the full to find a feasible integrated
design. Furthermore, the dissertation presents a solution for a gear change mechanism,
which is located inside an integrated electric motor gear assembly.
The designed and measured performance of the integrated system meets the needs of
many off-road working machines. The prototype motor has about 40 kW power and could
be adapted for instance on each wheel of a farming tractor, bucket loader, or harvester.
The same technology could also be used in on-road applications, such as buses or trucks,
intended for difficult terrains.
Kokoelmat
- Väitöskirjat [1034]