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Homework Help: Relationship to determine the lifting capacity of an electromagnet

  1. Jun 23, 2010 #1
    1. The problem statement, all variables and given/known data

    To determine a formula that can be used to determine the lifting capacity of an electromagnet/magnet through a known air gap.

    2. Relevant equations

    Weight= (magnetomotive force)/reluctance

    3. The attempt at a solution

    From the experiment the following general observations were made with respect to the lifting capacity of the electromagnet.

    Lifting strength increased as # of turns doubled, current doubled and size of core doubled, however decreased as air gap increased.

    By using the equation:

    Effect= Cause/Opposition

    Where the desired effect is to overcome the object weight
    the cause is the magnetic force produced by the magnet
    the resistance to the magnetic flux due the the air gap.

    Weight= (magnetomotive force)/reluctance

    Weight= BlIsinθ/(l/μA)
  2. jcsd
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