Re: A Question Of Power

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "davidjames150"
<davidjames150@h...> wrote:

> I've been looking at stepper motor product tables and notice

different

> descriptions for amp ratings. I have no actual experience with
> steppers and wonder if anyone can tell me:
>
> 1.a] Do Amps and Nameplate Current Rating represent the same thing?
> 1.b] If not, what is the mathmatical relationship between them?
> 2.a] Are Amps and Amps Per Phase equivalent?
> 2.b] If not, what is the mathmatical relationship between them?
> 3.} For these two types, are Amp ratings equivalent to those of

Center

> Tap, Half Winding (for 6 Lead) and Parallel (for 8 Lead)

connections?

Nameplate current and amp rating are the same thing. that's simple
enough.

the power supply relation is nameplate amps (current) times nameplate
voltage is watts.

size your power supply on watts.

since you only power one coil at a time, or in microstepping mode,
total amp is the same as one coil rating, you do not double the power
supply.

for center tap one a 6 wire, or single coil on an 8 wire, use the
full amp load for the stepper.

for series on a 6 wire use exactly one half the nameplate.

parallel on an 8 wire uses the same full nameplate as half coil on a
6 or one coil on an 8. btw, per the Gecko white paper, the parallel,
8 wire connection is about 3% more efficient than a single coil.

Dave