Contactless Motor

Discussion in 'The Projects Forum' started by yenerunver, Mar 31, 2013.

  1. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    Hi all,

    As a new member of the forum, I would like to make entrance with a mind-blowing question :p

    I'm having a problem about my project and don't know where to focus. Here is the situation;

    We have a crank shaft which should turn without any contact to the motor.

    Let me give details, we have a cylindric shaft. By installing a squirrel cage or whatsoever, I want to turn this shaft without touching it, with magnets or induction etc.

    Please, guide me, I'm desperate :(
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I think we will need more information, such as:
    What is attached to the crank, or what is the load on the shaft?
    What are the specs on the motor (type, horsepower, volts, amps, RPM, etc.)?
     
  3. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    It's a flywheel system so a flywheel on center and bearing at ends, nothing else.

    The load on the shaft is not determined right now, it can change due to design.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Blow air on a squirrel cage.
    Shoot a stream of water at a Pelton wheel.
     
  5. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    Sorry, I didn't become clear at first.

    This will be a kinetic energy storage system so I should use a type of electric or induction motor.

    Also it should be convertible to a generator on will.
     
  6. Ron H

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    Apr 14, 2005
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    And what will drive the generator? The flywheel?
    If so, then you need some sort of coupling that works both ways. That sounds pretty tough, if you can't use magnets for coupling the shafts together.
     
  7. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    The shaft that we gave energy before. I will take back the energy I gave with a magnetic or whatsoever generator.
     
  8. Ron H

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    Apr 14, 2005
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    See my edit to my previous post.
     
  9. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    Then I shall explain more.

    This has done before, known as Flywheel Energy Storage system.

    The system works with a crank that the flywheel is attached to it; bearings to hold the shaft and a motor that gives energy and turns the shaft and then some time later takes back some of the given energy via behaving as a generator.
     
  10. Ron H

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    Apr 14, 2005
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    I know that. As your original post stated, you need some sort of bidirectional, contactless, non-magnetic coupling between the motor/generator and the flywheel. Is that correct?
    If so, why are the coupling requirements so restrictive?
    And why are you mentioning a crank? A crank converts rotary motion to reciprocating motion, or vice-versa.
     
  11. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    Sorry for my English then, I was talking about the shaft :)

    There is no obligation about non-magnetism, it can be magnetic.
     
  12. Ron H

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    Apr 14, 2005
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  13. williamj

    Active Member

    Sep 3, 2009
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    yenerunver,

    Have you considered a hydraulic coupling? Just Google and look around.
     
  14. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    There are numerous magnetic/air gap couplings for motors.

    heck we have a small cnc type machine here at work that has magnetic couplings from the stepper motors to the threaded rod. works perfect.
     
  15. yenerunver

    Thread Starter New Member

    Mar 31, 2013
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    I thank you all for your suggestions.

    Magnetic couplings or turning the flywheel to a squirrell cage and building a stator around it will probably solve our problems.

    Thank you again.
     
  16. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Google for "pancake motors", this is a common type of motor with perm magnets on the flywheel, and stator coils driving it.
     
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