motor question

Discussion in 'Homework Help' started by todmeg, Oct 20, 2009.

  1. todmeg

    Thread Starter New Member

    Sep 20, 2009
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    are electric motors electro-magnetic devices? i say yes but a classmate says no. thanks in advance.
    scott
     
    Last edited: Oct 20, 2009
  2. JDT

    Well-Known Member

    Feb 12, 2009
    658
    85
    Yes!

    (ten more chars)
     
  3. todmeg

    Thread Starter New Member

    Sep 20, 2009
    9
    0
    many thanks!!!
     
  4. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    many motors do use permenant magnetics, so one could argue that these aren't purely electro magnetic. The principle of voltage creation within a flux however remains.
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    I don't agree because the current through the armature creates a magnetic field.
     
  6. JDT

    Well-Known Member

    Feb 12, 2009
    658
    85
    Of course it is possible to make an electrostatic motor that does not rely on magnetic fields. See:-
    http://amasci.com/emotor/emot1.html

    Also, a motor does not have to produce rotary motion. Just has to produce mechanical movement. A loudspeaker is an electric motor. Usually an electro-magnetic motor.

    A piezo-electric tweeter, for example is an electric motor that is not magnetic. You can also get large electro-static loudspeakers.

    But most motors are electro-magnetic!
     
  7. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    ... I will agree
     
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