Motor bogie on the AGV Alstom Transport
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The AGV is based on three main technologies which have been combined for the first time: articulated carriage architecture, a distributed drive system and synchronous permanent magnet motors. All three contributed to the performance of the train which set the world rail speed record of 574.8 kph on 3 April 2007.
Designed for a commercial speed of 360 kph, the AGV uses an articulated architecture which gave a major technological advantage to the TGV. This involves positioning the bogies (axles and wheels) between the train carriages, contrary to their traditional positioning under the carriages.
This technology eliminates most of the vibrations and noise caused inside the carriages when the train is travelling along as well as damping any movement between the carriages. Above all, this architecture provides a tremendous safety advantage: as the carriages are tightly meshed together, the train as a whole is more rigid. If there is a derailment, it should not deform (unlike a non-articulated train which could fold up) but should remain upright and in one piece.
20% more available space
The AGV’s main innovation is the combination of the articulated technology with a distributed drive system. This is achieved by locating the train’s motors under the floor of the carriages instead of putting them in dedicated locomotives at the front and back of the train. The removal of the locomotives increases the train capacity. When compared with a train of equal length, the AGV has 20% more space which can be adapted to suit requirements: increase the number of seats or provide special facilities such as lounges, leisure or working areas.
A power-weight ratio of 22.6 kW/ton
Another innovation in the AGV is the use of synchronous permanent magnet motors for the train’s electro-dynamic traction and braking. Fitted with six drive bogies in its 11 car configuration and when travelling at 360 kph, the AGV generates massive, unparalleled power of 22.6 kW/ton, 23% higher than its main competitor.
The combination of these technologies, which is unique to Alstom, contributed to the performance of the train which set the world rail speed record of 574.8 kph on 3 April 2007.