Re: Stepper motor wiring-- series or parallel

Hi,

The speed improvement is 2X, not 4X.

Inductance is 1/4 of series value, so inductive reactance is also 1/4
at a given speed. Inductive urrent increases 4 X, (I = V / (2 pi f
L)) but there are only half as many turns of wire. This sets the
parallel ampere-turn advantage to 2 X that of series.

Mariss

--- In CAD_CAM_EDM_DRO@egroups.com, Jon Elson <jmelson@a...> wrote:
>
>
> If your driver can handle the current (it requires doubling the
> current when you switch from series to parallel) then parallel
> will allow almost 4 x the speed at the same torque, as the
> inductance is reduced to 1/4 of the series value.
>
> You may find, if your holding torque is adequate, that going
parallel
> even with less than 2 x current will give a big boost in torque at
> higher speeds. Try it and see!
>
> Jon