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electromagnets

  • 09-11-2009 12:47am
    #1
    magnet.man
    Closed Accounts Posts: 1 ✭


    Hi, just wondering if anybody knows wether electromagnet force can be controlled with varied charge input from 12volt source.

    Cheers,
    M


Comments

  • #2
    Professor_Fink
    Registered Users, Registered Users 2 Posts: 861 ✭✭✭Professor_Fink


    magnet.man wrote: »
    Hi, just wondering if anybody knows wether electromagnet force can be controlled with varied charge input from 12volt source.

    Cheers,
    M

    What do you mean by charge input? You can control it by changing the current. a simple way to do this is to have the magnet in parallel with a variable resistor.


  • #3
    FarmerGreen
    Registered Users, Registered Users 2 Posts: 1,134 ✭✭✭FarmerGreen


    Professor_Fink wrote: »
    What do you mean by charge input? You can control it by changing the current. a simple way to do this is to have the magnet in parallel with a variable resistor.
    In series with the electromagnet would be better.
    Example, a 12 ohm resistor would limit the current to less than 1 amp.
    It would also get hot, 12 volts x 1 amps = 12 watts, use a 25 watt rated resistor.
    If you had a variable power supply you could turn the 'force' up and down
    with the voltage control.


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