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  • Users: mac2
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  1. mac2

    Solenoid design

    If this is going to be in a vacuum, how do you plan on removing the heat from the coil?
  2. mac2

    Magnetic lateral force?

    sorry, typing not so good. Should be "coefficient" of friction.
  3. mac2

    Magnetic lateral force?

    From a application view, there is a "drag" force as a result of the cooeficients of friction between the magnet and the load. A rule of thumb is the latteral force is about 25% of the vertical force. This can vary considerably depending on the contact surface conditions, i.e. smooth, rough...
  4. mac2

    Help With Magnet Gripper for Robot

    What is the expanded metal thickness? Is each screen free from the one below it i.e. not tangled in any way. Is there an oil film between screens. Are subsequent screen openings in line with the ones above and below or are they randomly positioned? Do the screens lay flat? Depending on the...
  5. mac2

    Help With Magnet Gripper for Robot

    What is the screen made of? Round or square wire, expanded metal, etc...
  6. mac2

    Building a Magnetic HEart

    You would also have to be concerned about people who have medical devices such as pace makers (etc), coming into range of the magnetic field. There could be some deadly consequences.
  7. mac2

    emmisivity of manganese steel

    I am trying to locate the emmisivity of manganese steel that is used as a wear surface on a drum. I do not find it listed in any of the published charts. Thanks. Mac2
  8. mac2

    Beginers Simulation Tool Needed

    Several years ago a paper was presented at the IEEE magnetic society meeting that provided a closed form solution for calculating the force between two permanent magnets. The variables were the x,y,z dimension of each magnet, the off-set and gap if any and the direction of magnetization. The...
  9. mac2

    Loss of magnetic power

    Once the solenoid has reached the point where it requires twice the voltage to achieve the force you require, try reversing the 30VDC in the coil and see what happens.
  10. mac2

    FLUX FOCUSING WITH POLE PIECE

    Todd, If you wish to persue the tapered pole approach, there is a good section in the book "Electromagnets" by D.J.Kroon that deals with (Stray flux and flux density). It covers both low and high fields (i.e. saturation). While principally dealing with electromagnets, the section dealing with...
  11. mac2

    High temperature application

    Contact Electron Energy Corporation at 1-800-463-1869 Mac2
  12. mac2

    Demagnetization

    In addition to the above, a hydrogen rich environment will do the trick also.
  13. mac2

    Hopper design for vibratory feeder

    What is the optimum gate height versus throat opening for a hopper discharging coal or aggregate onto a vibratory feeder?
  14. mac2

    AC motors in external DC field

    In this case, the AC Motor will be located in the magnetostatic field produced by a large suspended electromagnet. The magnet is used to separate "tramp iron" from the flow of ore that is being "cleaned up" before it goes to a crusher. Things like digger teeth and re-bar...
  15. mac2

    AC motors in external DC field

    Is there information available that defines the limit of an external magnetic field that an AC motor can tollerate without adverse effects? This situation occures when motors are operated near other magnetic equipment (i.e. magnetic drums).
  16. mac2

    Magnetic Modeling

    Another FEA package that works quite well is called MagNet. It is available from Infolytica in Montreal.

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