Re: [CAD_CAM_EDM_DRO] Re: variable transformer for dc power supply

Lee Studley wrote:

>Hi Troy,
>If its a regular variac,NO! it would be very dangerous sinces it's
>an auto-transformer who's secondary is not isolated from the
>secondary, as a normal transformer's would be. By isolation I meant
>that there is no electrical connection between the AC line input and
>the output ie the output has its own winding separate from the
>primary. The system would be potentially at line voltages and any
>metal contact could cause shocks and exploding electronic parts.
>
>

Oh gosh! You are right, I completely missed a word in the original message.
It would be fine to use a variac to adjust the output of an EXISTING
unregulated supply
that already has a transformer in it! That's what I was thinking he meant.

>--- In CAD_CAM_EDM_DRO@y..., mmiami johnson <mmiami2002@y...> wrote:
>
>
>>I am building an unregulated power supply to power my api stepper
>>
>>
>motor drives.
>
>
>>Does anyone know if it is ok to use a variable ac transformer as
>>
>>
>the transformer for an unregulated dc power supply? I already own
>the variac and it would save me some money and it would allow me to
>play around with different voltages.
>
>
>>
>>
>>Thanks in advance
>>
>>Troy
>>
>>
>>
>>---------------------------------
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>
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