17-11-2012, 02:22 PM
MAGNETICALLY LEVIATED TRAINS
MAGNETICALLY LEVIATED TRAINS.ppt (Size: 608.5 KB / Downloads: 26)
INTRODUCTION
The magnetic levitation system, or Maglev,utilizes an electromagnetic force to propel aerodynamic train at a high velocity. The Maglev system does not use steel wheels or steel rails, thus minimizing mechanical wear and noise production, resulting in lower maintenance costs and a more quiet operation compared to current transportation means.
PRINCIPAL
The dictionary definition of a train is a long line of vehicles travelling in the same direction - it is a train.
The principal of a Magnet train is that floats on a magnetic field.They follow guidance tracks with magnets. These trains are often refered to as Magnetically Levitated trains which is abbreviated to “MagLev”
THE MAGLEV TRACK
The magnetized coil running along the track, called a guideway, repels the large magnets on the train's undercarriage, allowing the train to levitate between 0.39 and 3.93 inches (1 to 10 cm) above the guideway. Once the train is levitated, power is supplied to the coils within the guideway walls to create a unique system of magnetic fields that pull and push the train along the guideway. The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils. This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.
How Transrapid Works
Support System
The electromagnets on the underside of the train pull it up to the ferromagnetic stators on the track and levitate the train.
The magnets on the side keep the train from moving from side to side.
A computer changes the amount of current to keep the train 1 cm from the track.
Propulsion System
The system consists of aluminum three-phase cable windings.
When a current is supplied to the windings, it creates a traveling alternating current that propels the train forward by pushing and pulling.