Electromagnetism and power requirements

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SUMMARY

The discussion centers on calculating the power requirements for a 1 tesla electromagnet with a length of 600 km, specifically in the context of powering a train traveling at 112 km/h. Key factors influencing power consumption include the weight of the train, friction, and the technology used for the electromagnet, such as superconducting films versus thick conductive bars. The conversation highlights that while no power is needed to maintain an electromagnet, practical losses and the need for cryogenic temperatures in superconducting systems necessitate power input. Initial priming with a diesel engine is also mentioned as a requirement for the train model.

PREREQUISITES
  • Understanding of electromagnetism principles, specifically related to electromagnets.
  • Knowledge of superconducting materials and their cooling requirements.
  • Familiarity with the physics of motion and energy consumption in trains.
  • Basic concepts of power, energy, and efficiency in electrical systems.
NEXT STEPS
  • Research the specifications and performance of superconducting electromagnets.
  • Learn about the energy consumption models for trains, including factors like weight and speed.
  • Investigate methods to minimize eddy current losses in large electromagnets.
  • Explore the principles of magnetic levitation and its application in train technology.
USEFUL FOR

Engineers, physicists, and researchers interested in electromagnet design, train energy efficiency, and advanced transportation technologies will benefit from this discussion.

Akshay690
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Can anyone please help I want to calculate the power required to make a electromagnet of strength 1 tesla and length 600km.
And how much energy a train consume in traveling per km with speed of 112km/h
 
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Hi there
welcome to PF :smile:

cant help with the first part

Akshay690 said:
And how much energy a train consume in traveling per km with speed of 112km/h

would need to know more info, eg ...
weight of the train, with passengers etc ... since that is going to vary, so is your power requirements
there will be friction to take into accountDave
 
Akshay690 said:
I want to calculate the power required to make a electromagnet of strength 1 tesla and length 600km.
Strictly speaking, power is the rate of energy flow. If you build the magnet very slowly it will require little power, but it will take a very long time.

The energy needed, (equivalent to a monetary cost), will depend on technology. A superconducting film and cooling system may be more economic than thick conductive bars.

The cost of turning the DC current to the electromagnet on will be high, because eddy currents will be induced in nearby conductors. How will you minimise the leakage flux yet still benefit from the magnetic field ?
 
In principal no power is required to maintain an electromagnet.

In practice, power would be required to overcome losses, or to maintain cryogenic temperatures if it is a superconducting electromagnet.

Edit: Baluncore, looks like we were both typing at the same time.:smile:
 
So I am trying to build a train model with a 1 tesla electromagnet on both side of train producing a field between train and if train is 600km with is average length of a train and running at 112km/h then it would produce enough power to run the train and magnetise the electromagnet.
The power can be saved with energizing only section in which train is present as just like in magnetic levitation train.
However initial priming is necessary with diesel engine
 
Average passenger train efficiency I just received from the inquiry of railway department of India
 
Akshay690 said:
However initial priming is necessary with diesel engine
What other sources of energy are being used ?
If there are no other energy sources, then either you are modelling an inefficient diesel, or you are dreaming of an "over-unity" "perpetual motion machine".
 
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