You will explain in detail the principles and laws of electrodynamics under which Maglevtrains operate. You will describe propulsion, guidance and levitation(250 word min for each question): 1.What is...

Question 1: What is required and how to start the train moving
The main parts of the Maglev :
1) Guide way and guide rails - keep the train to on track
2) Landing wheels; levitation coils - run along the base of the guide way
3) Emergency landing wheel; superconducting magnets and propulsion coils - run along the base of
guide way
4) A linear induction motor - moves and
akes the vehicle on the track.
To start the maglev train we require a linear motor which is a type of electric motor. The stator and
otor of this motor are un rolled hence instead of producing torque it produces linear force along its
length. In this the applied force is linearly proportional to the cu
ent and the magnetic
field .
Low-acceleration linear motors are suitable for maglev trains and other ground-based transportation
applications. High-acceleration linear motors are normally rather short, and are designed to accelerate
an object to a very high speed, for example see the railgun.
In induction motor, the force is produced due to moving linear magnetic field which is acting on
conductors in the field. Any conductor, a loop or a coil or simply a piece of plate metal, which is placed
in this field will have eddy cu
ents induced in it hence creating an opposing magnetic field( according
to Lenz's law). The two opposing fields will repel each other and hence creating motion as the magnetic
field sweeps through the metal.
http:
en.wikipedia.org/wiki/Linear_equation
http:
en.wikipedia.org/wiki/Electric_cu
ent
http:
en.wikipedia.org/wiki/Magnetic_field
http:
en.wikipedia.org/wiki/Magnetic_field
http:
en.wikipedia.org/wiki/Maglev_train
http:
en.wikipedia.org/wiki/Railgun
http:
en.wikipedia.org/wiki/Magnetic_field
http:
en.wikipedia.org/wiki/Eddy_cu
ent
http:
en.wikipedia.org/wiki/Electromagnetic_induction
http:
en.wikipedia.org/wiki/Lenz%27s_law
Here the principle of Electromagnetic propulsion (EMP), is used to accelerate an object by the
utilization of a flowing electrical cu
ent and magnetic fields. When cu
ent flows through a conductor
placed in a magnetic field, then an electromagnetic force known as a Lorentz force, pushes the
conductor in a direction which is perpendicular to both the conductor and the magnetic field. This
epulsing force is what causes motion of the train.
Question 2: How to stop the train
Maglev trains use principles of linear induction and magnetism to propel the train in forward or reverse
direction. To stop the train the orientation of the alternation cu
ent need to be changed which will
change the orientation of induced magnetic field. The combination of repulsive and attractive magnetic
forces causes the train to move towards a region of track. In the same fashion, to slow down the train
while it is moving, we must apply the repulsive and attractive forces in such a way opposite to which the
motion started.
The following diagrams below show the side view and top view of the track. The "==" represent the gap
etween the train and the track
Maglev Propulsion (Top Down View):
s---n----s---n----s---n---s
=================
--N---S---N---S---N---S ---->
=================
s---n----s---n----s---n---s
Here we see the net force on train is repulsive at top end and...