# Syntegra

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This article is about the Siemens-developed bogie. For the former systems integration division of BT, see [BT Global Services](/source/BT_Global_Services).

Syntegra bogie

**Syntegra** is a [bogie](/source/Bogie) developed by [Siemens](/source/Siemens) incorporating an axle mounted gearless electric drive in an inboard bogie.

The design was unveiled at [Innotrans](/source/Innotrans) in 2006, and began service trials in 2008 on the [Munich U-Bahn](/source/Munich_U-Bahn).[1][2]

## History and design

The motor design is a [hermetically sealed](/source/Hermetically_sealed) simple co-axial gearless synchronous motor (a permanent magnet, three phase drive, passively cooled design); the motors can also be used for electrical dynamic braking, and also as an active electric brake.[1][3] The wheelset bearings are mounted inboard and support both motor, axles and wheel. A traction link from motor to the vehicle frame transmits tractive forces.[3]

The bogie frame has a single central cross member which supports via pivots two longitudinal beams (in a '[weighing scale](/source/Weighing_scale)' arrangement) connected to the wheelset via the primary suspension.[3] The cross member supports the vehicle body via the secondary suspension of two outboard air springs.[1]

In mid-2006 prototype motors rated 110 kilowatts (150 hp), with claimed 96% efficiency, were fitted to an ex-[Munich U-Bahn](/source/Munich_U-Bahn) vehicle for testing at the [Wegberg-Wildenrath test circuit](/source/Wegberg-Wildenrath_Test_and_Validation_Centre).[4] In 2008 a train fitted with two Syntegra bogies began in-service tests on the Munich U-Bahn.[5]

A 150 kilowatts (200 hp) prototype was displayed at [Innotrans](/source/Innotrans) (2009), the prototype bogie weight was 5.6 tonnes (5.5 long tons; 6.2 short tons), with a 1.6-metre (63-inch) wheelbase and a maximum axleload of 14 tonnes (14 long tons; 15 short tons).[1]

## References

1. ^ [***a***](#cite_ref-unveil_1-0) [***b***](#cite_ref-unveil_1-1) [***c***](#cite_ref-unveil_1-2) [***d***](#cite_ref-unveil_1-3) Hondius, Harry (1 November 2006), ["Syntegra revives the gearless drive"](http://www.railwaygazette.com/news/single-view/view/syntegra-revives-the-gearless-drive.html), *railwaygazette.com*, [Railway Gazette International](/source/Railway_Gazette_International)

1. **[^](#cite_ref-service_2-0)** ["Syntegra gearless bogie enters service"](https://web.archive.org/web/20110616062002/http://www.railwaygazette.com/news/single-view/view/syntegra-gearless-bogie-enters-service.html). *railwaygazette.com*. [Railway Gazette International](/source/Railway_Gazette_International). 13 August 2008. Archived from [the original](http://www.railwaygazette.com/news/single-view/view//syntegra-gearless-bogie-enters-service.html) on 16 June 2011. Retrieved 20 August 2008.

1. ^ [***a***](#cite_ref-syn1_3-0) [***b***](#cite_ref-syn1_3-1) [***c***](#cite_ref-syn1_3-2) ["Syntegra : The complete integration of traction, bogie and braking technology"](https://web.archive.org/web/20111006082834/http://www.mobility.siemens.com/mobility/global/Documents/en/rail-solutions/components-and-systems/brochure-syntegra-en.pdf) (PDF), *mobility.siemens.com*, [Siemens](/source/Siemens), archived from [the original](https://www.mobility.siemens.com/mobility/global/Documents/en/rail-solutions/components-and-systems/brochure-syntegra-en.pdf) (PDF) on 6 October 2011

1. **[^](#cite_ref-4)** ["Gearless motor"](https://www.railwaygazette.com/nc/news/single-view/view/gearless-motor.html), *railwaygazette.com*, [Railway Gazette International](/source/Railway_Gazette_International), 1 August 2006

1. **[^](#cite_ref-5)** [*Siemens' Syntegra bogie premiers at the Munich Metro*](https://www.siemens.com/press/en/pressrelease/?press=/en/pressrelease/2008/mobility/imo200808042.htm), Siemens, 18 August 2008

### Literature

- Joeckel, A.; Lowenstein, L.; Teichmann, M. (2006), ["Syntegra – Innovatives Triebfahrwerk mit Direktantrieben"](http://cat.inist.fr/?aModele=afficheN&cpsidt=18108251), *Glasers Annalen* (in German), **130** (9), ZEVrail: 368–379, [ISSN](/source/ISSN_(identifier)) [1618-8330](https://search.worldcat.org/issn/1618-8330)

- Germishuizen, J.; Jockel, A.; Hoffmann, T.; Teichmann, M.; Lowenstein, L.; v.Wangelin, F. (2006). "SyntegraTM - next generation traction drive system, total integration of traction, bogie and braking technology". *International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006*. p. 1073. [doi](/source/Doi_(identifier)):[10.1109/SPEEDAM.2006.1649927](https://doi.org/10.1109%2FSPEEDAM.2006.1649927). [ISBN](/source/ISBN_(identifier)) [1-4244-0193-3](https://en.wikipedia.org/wiki/Special:BookSources/1-4244-0193-3). [S2CID](/source/S2CID_(identifier)) [14293650](https://api.semanticscholar.org/CorpusID:14293650).

- Lowenstein, L.; Joeckel, A.; Hoffmann, T.; Körner, O.; Teichmann, M.; v.Wangelin, F., ["Syntegra – The intelligent Integration of Traction, Bogie and Braking Technology"](http://www.uic.org/cdrom/2008/11_wcrr2008/pdf/R.1.1.3.1.pdf) (PDF), *uic.org*, Siemens

## External links

- ["Syntegra - The complete integration of traction, bogie and braking technology"](https://web.archive.org/web/20080929194459/http://www.transportation.siemens.com/ts/en/pub/products/comp/syntegra.htm), *transportation.siemens.com*, Siemens, archived from [the original](https://transportation.siemens.com/ts/en/pub/products/comp/syntegra.htm) on 29 September 2008

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Adapted from the Wikipedia article [Syntegra](https://en.wikipedia.org/wiki/Syntegra) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Syntegra?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.