Re: Series/ Parrellel

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Alan Marconett" <KM6VV@a...>
wrote:

>
> Hi Jarrett,
>
> Unipolar wound steppers are often called 4-phase. Bi-polar wound

steppers

> are called 2-phase.
>
> Series/parallel only applies to bi-polar, you have no choice in

uni-polar.

>
> 4 wire units are always bi-polar. 5 wire units are always uni-polar
> (because the ct's of the coils are connected together). 6 and 8 wire
> steppers can be connected either way.

strictly and only 8 wire motors can be wired in parallel.

many people like the names so instead of saying series or single coil,
they use the more common (but incorrect) saying of series or parallel.

It is my understanding that phase referes to the coils of the motor
but it can also refer to the type of driver it has.

An 8 wire motor is a 4 phase, but, if you wire it in single coil, you
are only using two coils, ergo, it becomes wired for 2 phase. The
motor did not change.

A 4 wire is a 2 phase.

a 6 wire has 4 coils, ergo a 4 phase, but it can be wired single coil
or it can be wired with two in series, or it can be wires uni-polar.


it is more approate to describe the motor as to the number of wires
than anything else.

AS for the dielectric, dielectric is an insulator. the motor can take
up to the rating before the voltage can arc between windings. not
really important unless you have a 500 volt power supply.

Dave

>
> Don't worry about the dielectric! You can wire your 8's either way!
>
> Alan KM6VV
>
>
> > -----Original Message-----
> > From: CAD_CAM_EDM_DRO@yahoogroups.com
> > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jarrett & Heidi
> > Johnson
> > Sent: Wednesday, November 30, 2005 10:18 AM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: [CAD_CAM_EDM_DRO] Re: Series/ Parrellel
> >
> > Can someone confirm for me that series or parrellel connections of
> > steppers is in fact the same thing as two or four phase? I came across
> > some steppers that are claimed to be 4 phase, however I've been

told that

> > you can also set them up as 2 phase? They are 8 wire unit's in a

Nema 34

> > frame. The documentation also claims a Dielectric strength of 500Vdc,
> > whats that??
> >
> > Thanks
> > Jarrett Johnson
> >
>