Conventional trains produce friction between the wheels and rails while operating.
This limits maximum speed because the wheels slip when moving too fast.
The maglev concept overcomes this limitation by levitating the train above the track.
This limits maximum speed because the wheels slip when moving too fast.
The maglev concept overcomes this limitation by levitating the train above the track.
This is why the Maglev concept was developed, using magnetic force to levitate and operate trains.
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This system also resolves issues below.
- Noise
- Power feeding
Why is it called a "linear motor"?
The Superconducting Maglev system is actually based on a very common motor principle.
The term "linear motor" comes from the fact that motors are lined up linearly.
The Superconducting Maglev system is actually based on a very common motor principle.
The term "linear motor" comes from the fact that motors are lined up linearly.
Why is it called a "linear motor"?
The Superconducting Maglev system is actually based on a very
common motor principle. The term "linear motor" comes
from the fact that motors are lined up linearly.
The Superconducting Maglev system is actually based on a very
common motor principle. The term "linear motor" comes
from the fact that motors are lined up linearly.
Magnets have two poles with repulsion between the same poles (N and N or S and S) and attraction between opposite poles (N and S).
A normal conducting magnet requires a substantial amount of electric power to deliver powerful magnetic force.
Its electrical resistance generates heat, wasting energy.
Its electrical resistance generates heat, wasting energy.
To gain powerful magnetic force, the Superconducting Maglev uses superconducting magnets, taking advantage of a phenomenon called "superconductivity,"
"Superconducting magnets" on vehicle and electromagnets on the guideway attract and
repel one another, levitating the train by about 3.9 in. and propelling it forward.
repel one another, levitating the train by about 3.9 in. and propelling it forward.
The guideway contains Propulsion Coils as well as Levitation and Guidance Coils.
"Superconducting magnets" on vehicle and electromagnets on the
guideway attract and repel one another, levitating the
train by about 3.9 in. and propelling it forward.
guideway attract and repel one another, levitating the
train by about 3.9 in. and propelling it forward.
The superconducting magnets on vehicle are set to N and S poles alternately. Electric current is fed to "propulsion coils" on the guideway, and their N-pole and S-pole assignment is switched electrically to propel the train forward. The frequency of electric current is adjusted to control the speed for switching between N and S poles, so as to regulate the train's speed.
The Superconducting Maglev uses the effect of the "Levitation and Guidance
Coils" turning into magnets when other magnets come close.
When superconducting magnets on vehicle pass by the Levitation
and Guidance Coils at high speed, electric current runs through the
Levitation and Guidance coils, generating magnetic force and
levitating and maintaining the train at a height where the train's
weight is balanced against the magnetic force.
(Levitation height: about 3.9in.)
There is no need to feed electricity to the Levitation and Guidance
Coils to achieve train levitation.
Coils" turning into magnets when other magnets come close.
When superconducting magnets on vehicle pass by the Levitation
and Guidance Coils at high speed, electric current runs through the
Levitation and Guidance coils, generating magnetic force and
levitating and maintaining the train at a height where the train's
weight is balanced against the magnetic force.
(Levitation height: about 3.9in.)
There is no need to feed electricity to the Levitation and Guidance
Coils to achieve train levitation.
Vehicle travels at the center of the guideway.
Even when the vehicle leans closer to one side, the magnetic force
that acts between superconducting magnets and the Levitation and
Guidance Coils keep the train centered in the guideway at all times.
The magnetic force prevents the Superconducting Maglev from
crashing into guideway walls and contributes to stable operation.
Even when the vehicle leans closer to one side, the magnetic force
that acts between superconducting magnets and the Levitation and
Guidance Coils keep the train centered in the guideway at all times.
The magnetic force prevents the Superconducting Maglev from
crashing into guideway walls and contributes to stable operation.
Superconductivity is a phenomenon that happens when the electrical resistance of certain materials approaches zero at very low temperature When an electrical current is applied to a superconducting coil, the current continues to flow almost indefinitely.
In the Superconducting Maglev system, liquid helium is used to cool the superconducting material, niobium‐titanium alloy, to 452 degrees Fahrenheit below zero. This achieves semi-permanent feeding of electric current and a stable state of superconductivity with no thermal energy loss, thereby generating even greater magnetic force.
The motor uses magnetic force to convert electricity to rotation. Attractive forces between north and south poles, and repulsive forces between S-S and N-N poles, power the train.
A linear motor is like a conventional rotating motor that is opened up and extended linearly. It uses magnetic action to drive a train.
A permanent magnet is a magnetized material that creates a continuous magnetic field.
1. It requires electric current to act as a magnet.
2. Its N and S poles can be switched by changing the direction of electric current.
