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# Transformer design help needed

- To: femm@yahoogroups.com
- Subject: Transformer design help needed
- From: jim.bloor@smiths-aerospace.com
- Date: Tue, 18 Sep 2001 14:20:13 -0000
- User-agent: eGroups-EW/0.82

    Hi

    The notes on 'Calculating Transformer Inductances with Femm' kindly
    supplied by Cornelius Paul as a result of my last request have been
    very useful. I now want to look at designs with loosely coupled
    transformers, the couplng being variable thus providing an output
    dependent on the transformer core position. To do this I need to
    determine the ratio of input to output for various arrangements of
    coils and cores. Can anyone please explain how to obtain the
    necessary results from my models ideally in the form Vin and Vout.

    Many thanks

    Jim Bloor

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