Re: [CAD_CAM_EDM_DRO] Yet another power supply question

JAY,
I too have those motors (P22....).
Here are the conn's:
A + (6) Yellow---------->
A - (2) Violet---|
| Phase A
a + (5) Pink-----|
a - (1) Green----------->


B + (8) Orange---------->
B - (4) Blue-----|
| Phase B
b + (7) Brown----|
b - (3) Gray------------>

I got best torque on bipolar full series as shown above.
I am using a 30VAC/100VA output Xmer/bridge rect/60,000mfd 45dc cap
Giving ~40VDC out driving a L298/L297 Camtronics 3 Axis board.
Any rectifier of 10A/100V rating or better will do.
I try to use 18 or 16 gauge wire in the motor circuits.
RichD

jbolt001 wrote:

>
> Hi group,
>
> While the subject of power supplies is floating around right now and
> I will be working on one soon I'll put my questions out as well. I am
> very electrically "challenged" so be kind.
>
> My step motors are 8 wire PowerMax II double stacks. Connected in
> parallel they are rated at 4.6 amps/phase and 0.38 ohms/phase. (This
> is where my ignorance starts to show.) What do they mean by phase in
> a step motor?
>
> Using the formulas from the white papers on the Gecko site I came up
> with the following:
>
> 3(motors) * 4.6 amps * .666 = 9.2 amps
> 4.6 amps * 0.38 ohms = 1.75 volts
> 1.75V * 25 = 43.75 VDC Max
> For Geckos I will need a Transformer with an output between 24 to 44
> VDC
>
> Transformer = single secondary 24VAC / 10amps (24*1.4=33.6VDC)
> Torodial? I could not make heads or tails of what would be a
> comparable torodial transformer.
>
> Filter Capacitor C=(80,000*I)/V or 80,000*10amps/ 33.6 = 23,810uf
> The closest CAPs look to be 27000uf 50V (more ignorance again) What
> type of capacitor do I need? When I searched the electronics sites
> there must be a dozen or more types of caps.
>
> Bridge Rectifier, min 12A 50V max 25A 100V?
>
> What size, type wire should be used?
>
> So am I close?
>
> Thanks,
>
> Jay