| 1. |
|
|
| 2. |
- Skoglund, Mattias, et al.
(författare)
-
Dual mode locomotives - System studies of new freight locomotives for Sweden
- 2008
-
Ingår i: Proceedings of IEEE/ASME Joint Railroad Conference. - 9780791848128 ; , s. 263-268
-
Konferensbidrag (refereegranskat)abstract
- A conceptual study for a Swedish dual-mode locomotive is presented. The primary energy sources are AC electricity from an overhead catenary system or a diesel-electric generator system. The study focuses on analysing how freight operations and locomotive utilisation can be improved and how it can affect environmental aspects of freight operations. Based on project experiences and operative demands, a system proposal has been presented. The rated power output is considerably higher in electric mode compared to diesel mode. The reason for this being higher power demand on electrified main lines compared to branch lines and yards lacking overhead catenary where the power need is lower. The starting tractive effort will however be the same regardless of electric mode or diesel mode, making it possible to haul the same train weight in both propulsion modes. The study has shown that dual-mode locomotives for Swedish freight operations are most interesting in order to improve operations, degree of utilisation and environmental performance.
|
|
| 3. |
- Skoglund, Mattias, et al.
(författare)
-
The Swedish T43H Hybrid Locomotive
- 2009
-
Ingår i: 16th ITS World Congress.
-
Konferensbidrag (refereegranskat)abstract
- Experiences from the Swedish hybrid locomotive (T43H) are presented. The locomotive has a series hybrid propulsion system with a comparatively small diesel engine and a large battery pack. Original layout was a traditional diesel-electric power train. Indications from switch operations show fuel savings of 37 to 50 % with the hybrid locomotive. The Swedish experiences are thus in parity with North American experiences showing savings between 30 and 80 %. The evaluation showed that hybrid locomotives in switch duty have significant advantages compared to conventional diesel locomotives in terms of reducing fuel consumption and improving environmental performance.
|
|
| 4. |
|
|
| 5. |
- Östlund, Stefan, 1961-, et al.
(författare)
-
Condition Monitoring of Pantograph Contact Strip
- 2008
-
Ingår i: IET Seminar Digest. - : IEE. - 9780863419270
-
Konferensbidrag (refereegranskat)abstract
- A common issue in electric railway operation is the wearofthepantographcontact strip. This is especially pronounced with ice or rime frost on the overhead line that causes arcing between the contact strip and the contact wire. To monitor the contact strip it is possible to utilise the fact that arcing between the contact strip and the overhead line generates a DC component in the AC locomotive current. The paper presents a method forconditionbased maintenanceofthe contact strip. The wearofthe contact strip is predicted bymonitoringthe running distanceofthepantographas well as the DC componentofthe locomotive current. To evaluate the method, measurements have been carried out on a Swedish Re locomotive during winterconditions.
|
|
| 6. |
- Östlund, Stefan, 1961-, et al.
(författare)
-
Designing, implementing and maintaining a first year project course in Electrical engineering
- 2008
-
Ingår i: European Journal of Engineering Education. - : Taylor & Francis. - 0304-3797 .- 1469-5898. ; 33:2, s. 231-242
-
Tidskriftsartikel (refereegranskat)abstract
- Being a modern electrical engineer does not only require state of the art skills in areas such as transfer and processing of information, electronics, systems engineering, and biomedical electrical engineering; it also requires generic engineering skills such as oral and written communication, team building, interpersonal skills, and the ability to take the responsibility of solving assigned tasks. In the development of a new electrical engineering curriculum, it was considered a challenge to introduce these generic engineering skills in a more applicable way. The approach described in this paper has been very successful in implementing and maintaining a challenging first year project based engineering course with a high level of training of generic engineering skills.
|
|
| 7. |
|
|
| 8. |
|
|
