Re: About leakage inductance in transformers

MassiveProng wrote:
On Mon, 05 Mar 2007 08:35:13 +1300, Terry Given <my_name@xxxxxxxx>
Gave us:


BTW It is possible to make 50/60Hz mains transformers with very little core material - just a post inside the concentric windings. Of course the magnetising inductance is low, so Imag is high, and they puke flux everywhere, but the core losses are extremely low (what with there being mostly no core), and the overall result can be cost-effective.


Bwuahahahahahahaha!

its called a partial-core transformer.

http://www.ewh.ieee.org/r10/nzs/IEEENZS_Postgrad_Presentations_2006.pdf

contains a brief description of such a device.

Prof. Bodger at Canterbury University, NZ, has done a lot of work on these.


Cheers
Terry
.

Relevant Pages

  • Re: About leakage inductance in transformers
    ... core material - just a post inside the concentric windings. ... magnetising inductance is low, so Imag is high, and they puke flux ...
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  • Re: About leakage inductance in transformers
    ... Of course the magnetising inductance is low, so Imag is high, and they puke flux everywhere, but the core losses are extremely low, and the overall result can be cost-effective. ... I thought others might be interested in partial core transformers though. ...
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  • Re: forward converter, higher Bmax through gap?
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  • Re: forward converter, higher Bmax through gap?
    ... > If you gap the core then magnetising inductance drops and the ripple ... The peak and peak to peak flux remain the ... > Makes no reference to the magnetic path length, Le, or associated gap, ...
    (sci.electronics.design)
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