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Electromagnet & Magnetic field range in milliseconds?

  1. Oct 6, 2014 #1
    How is it possible to build an electromagnet(magnetic field of 1 - 5 Tesla) that could create the magnetic field in milliseconds or less? Electromagnet designs that I found would have high resistance & inductance, creating a field in 2 - 5 seconds. Although, they would consume 15 - 20kW of power.

    And would require 1 liter of water/min for cooling, can an electromagnet be built without having all that cooling?
     
  2. jcsd
  3. Oct 6, 2014 #2

    davenn

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    yes, but it just wouldn't be as strong
     
  4. Oct 6, 2014 #3
    Would it be possible to build such an electromagnet? And that fast...? Why would it be weaker?
    I find using water for cooling is going to be a bit tedious, can't air cooling be used? Or heat sink transferring?
     
  5. Oct 6, 2014 #4

    davenn

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    for a high power electro magnet
    the coil must be larger ( more turns etc) -- this affects the rise time of the of the magnetic field
    The larger the coil and the stronger the magnetic field, the more current that is required and that is going to generate lots of heat
    thus better types of heat dissipation needs to be considered
     
    Last edited: Oct 6, 2014
  6. Oct 6, 2014 #5
    Wouldn't more turns means the time would be slower?
    Having heat reduced can be solved possibly with air(fans) or maybe similar to the idea of heat sinks, what about the power required for such a magnet?
     
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