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Solenoid power and conical area

  1. Jun 22, 2009 #1
    Hello ,

    I have been wanting to find out the how heat generation of a tubular solenoid (pull-type)actuator is calculated?

    Secondly, why do most solenoid design use a plunger with a flat face/conical surface area . If I am looking for 1mm of stroke.. and a force output of 2500N, what apex angle of armature could I use. IF so, what would be the heat generation.

    Regards
     
  2. jcsd
  3. Jun 22, 2009 #2
    Resistive heating of the windings? Eddy currents in the core material?
     
  4. Jun 23, 2009 #3
    Heys,

    Resistive heating due to wirings, heat generation = I^2*R.

    R is found by length * (ohm/m), which is taken from American Wire Gauge
    Length is found by N,no. of wire turns multiply by the average circumference of wire coil around the bobbin.

    I, curent is found by fixing F=2500N, air permeability, surface area of the cone, air gap is 1mm, then vary N to find I. After which able to find heat generation from resistance of wire.

    Please correct me if I am wrong..!

    By the way, how do I find heating due to eddy current in core materials.

    Regards
     
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