Re: Stepper Motor Power supply Sizing.

Peter,

Bob has the right answer, it is 2.66A for a 4A rated motor. That will
be the maximum supply current which occurs when the motor is turning
at high speed and is loaded to just short of stalling. Other
conditions will draw substantially less supply current.

Mariss

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Peter Homann"
<peter.homann@a...> wrote:

> Hi,
>
> I have been looking at Marriss's White paper on Power Supply's

where it

> states that the current requirements for a stepper motor is 2/3 of

the

> motors rated current in Parallel and 1/3 when in series.
>
> So, If I have a 4ohm, 4A/phase 8 wire stepper and I wire it in

parallel, is

> the current requirements for the motor 4*2/3 = 2.66A or is it

2*2.66 =

> 5.333A as the motor has 2 phases.
>
> Thanks,
>
>
> Peter Homann
> mailto:Peter.Homann@a...
> Adacel Technologies Limited,
> 250 Bay St, BRIGHTON, 3186, AUSTRALIA
> http://www.adacel.com <http://www.adacel.com>
> Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
> Mobile 0421-601 665