Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electromagnets suffer from temp coefficients?

  1. Jun 27, 2005 #1

    Cliff_J

    User Avatar
    Science Advisor

    Ok, so the wire used in an electromagnet will likely have its resistance affected by a temp change on a PTC and thus require a higher voltage to maintain power, simple enough. But will an electromagnet also suffer temp coefficients for induction and coercivity and have a currie temp too?
     
  2. jcsd
  3. Jun 27, 2005 #2

    berkeman

    User Avatar

    Staff: Mentor

    The ferrous metal of the electromagnet will have a Curie temperature, and the mu of the metal will have a temperature coefficient. Usually the mu is highest at mid-temperature, and lower at the hot and cold extremes. But once you hit the Curie temperature, ker-plop.
     
  4. Jun 28, 2005 #3

    Cliff_J

    User Avatar
    Science Advisor

    Thanks. With proper spelling I now see that iron has a Curie point of around 700C which is well beyond what I need.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Electromagnets suffer from temp coefficients?
  1. Resistor temp PPM (Replies: 1)

Loading...