Re: [CAD_CAM_EDM_DRO] transformer question

turbulatordude wrote:

>Hi,
>
>I have a transformer with a lable of 220/460 primariy and 110/220
>secondary.
>
>1kva.
>
>Would I be able to connect it 110 to get 55 volt ?
>

Yup, that's right, you'll get 55 VAC from each secondary winding.
Note than 55 V AC into a rectifier will give 78 V on the capacitor.

> and if so, any idea
>what current I could pull out of it ?
>
>

Best is to put the secondary in series and use a pair of big diodes (or
half of a bridge rectifier) with the center tap of the windings
connected to the
- of the capacitor. OK, starting with the KVA rating at the design
voltage of
110 V, the current would be I = (KVA * 1000)/V. So, a 1 KVA transformer
would provide 1000/110 = 9 A. This may be a little optimistic for
continuous
duty at full load, but will certainly be fine for most CNC applications.

Jon