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Transformer windings

Discussion in 'Electronic Design' started by Jason, Mar 31, 2008.

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  1. Jason

    Jason Guest

    Questions:
    What problems occur if after a number of winding layers:
    1) some winds aren't close beside one another?
    2) winding clockwise on a toriodal & a wind (single loop) goes anti-
    clockwise back lapping?

    Thanks in advance for any help :)
     
  2. Bill Sloman

    Bill Sloman Guest

    Actually, this might just be an astatic winding.

    The simplest way of winding a toroid - going clockwise around the ring, and
    stopping when the last turn is up agains the first turn - gives you a single
    loop in the plane of the toroid, and an external magentic field. Taking the
    "end"of the winding back around the toriod in the oppostie direction to the
    progression of the winding, while still wrapping the wire around the toroid
    in thre same direction as before, and taking it off the toroid only when you
    get back to the "start" cancels this loop in the plane of the toroid, and
    the external magnetic field.

    There are more complicated astatic winding schemes for a toroid but this one
    would work.

    The problem with talking about toroids is that you have two different planes
    to wory about - the winding around the body of the toroid has to keep on
    going around the cross-section of core material in the same sense, to
    maximise the inductance, but the progression of the winding around the
    toroidal loop in the plane of the toroid itself really should reverse
    half-way though the winding process (or in one scheme, a quarter of the way
    through the proess and again at three-quarters of the way to completion).
     
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