Re: Power supply transformer setup questions...

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Lloyd Leung" <lloyd@l...>
wrote:

> Is there a method of wiring two transformers of the same voltage

together to

> increase the amperage that they can supply? If possible, how

should I wire

> this up to produce a power supply? Is this a safe idea for wiring

up gecko

> G201 drives?
>
>
>
> I'm looking to go from 50VAC to 70VDC.
>
>
>
> The three stepper motors I'm going to use are: two 3V/3Amp, one

4.2V/3.5Amp.

> The sum of amperage required for the motors is 10AMPs. So I

require 6.7amps

> (2/3rds of sum).

I'm not sure, but it seems you are using using linear math to
determine amperage.

10 amps at 1 volt is not the same as 10 amps at 20 volts.
10A@1V=10 watts, 10A@20V=200 watts !

your motors,
3A@3v = 9 watts,
3.5A@4.2v = 14.7 watts.

23.7 watts total.

jumping to 50 volts, divide watts by volts to figure amps.
That means your power supply needs to be 2.1 amps. (then less 33%)


Seems you could use a 24 V, a 12 V and a 6 volt to get close to 60
volts. and you could tap off the 12 and 6 to get 18VAC for that
additional stepper.


Dave

>
>
>
> The transformers I'm looking to _some how_ link together are:
>
> 167P50 (50VAC/5Amp)
>
>
> http://sales.digikey.com/scripts/sales.dll?

action=lineitem;itemseq=14201596

>
>
>
> 167L50 (50VAC/2AMP)
>
>
> http://sales.digikey.com/scripts/sales.dll?

action=lineitem;itemseq=14201598

>
>
>
> Additional transfers from hammond manufacturing are

listed here:

>
>

http://www.hammondmanufacturing.com/5cpwr.htm

>
>
>
>
>
> Also, there is this little vexta stepper motor I have that I may

want to use

> for a rotary table:
>
>
>
> Vexta PK569AUHA (2.8Amp/0.55 oHm (so 1.54V??))
>
>
>
> Is there a way I can add this drive into the power supply, or

should I build

> a completely different power supply for this axis? If I use 50V to

this

> little motor, it's going to cook itself.
>
>
>
>
>
> So far, I have the gecko's and the motors... I would like input on

how I

> should setup my power supply, thanks.
>
>
>
>
>
>
>
> Lloyd, in Toronto.
>
>
>
> [Non-text portions of this message have been removed]