Re: Transformer Question

• To: tesla-at-pupman-dot-com
• Subject: Re: Transformer Question
• From: open_minded <bturner-at-apc-dot-net>
• Date: Tue, 17 Sep 1996 02:03:01 -0700

Tesla List wrote:
> 
> >From jparisse-at-ddlabs-dot-comSun Sep 15 21:44:06 1996
> Date: Sun, 15 Sep 1996 13:30:05 -0700
> From: "Jeff W. Parisse" <jparisse-at-ddlabs-dot-com>
> To: tesla-at-pupman-dot-com
> Cc: swan-at-d2-dot-com
> Subject: Transformer Question
> 
> I've been using two 4500VAC 400ma plate transformers pulled from copy
> machines. These transformers (GE) have an extra winding that is
> connected to a 660VAC 10uf capacitor.
> 
> Questions: What is the purpose of this capacitor? Power factor
> correction? Current limiting? What effect would result by changing or
> removing the capacitor?
> 
>    0---------) || (----------0
>              ) || (
>   LV In      ) || (
>              ) || (
>    0---------) || (
>                || (
>     |--------) || (   HV Out
>     |        ) || (
>    ---       ) || (
>    --- 10uf  ) || (
>     |        ) || (
>     |--------) || (-----------0
> 
> Thanks...   ...Jeff Parisse


Could be a PFC, or this actually could be a 'regulated' transformer
ala the Sola 'constant-voltage' type line regulator. From what I
remember, the large value cap and winding set up a 60-Hz resonant
circuit. Line over-voltage is absorbed due to increased core saturation,
and under-voltage is boosted due to resonance-rise in the tank circuit.

- Brent

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