Re: MOTOR PROTECTION

Thanks for the sound advice. I will just put in the relay to start as
you suggested.
john

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "caudlet" <thom@...> wrote:
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "john_glynn57"
> <john_glynn57@> wrote:
> >
> > I am just after receiving a new Bosch 1617EVS router spindle for
my cnc
> > router and was wondering if anyone has any advice on how I could
> > prolong the life of the motor with some clever electric circuit
to
> > protect the motor during startup\stopping. I'm sure Bosch have
thought
> > of this and have built in some protection but because I have a
large
> > electric cabinit I could easily fit additional circuitry.
> >
> > John
> >
> A couple of surge protectors across the AC is about all that makes
> sense. Motors don't have a lot of moving parts and handled surges
and
> overloads pretty well. Only thing that wears is the bearings and
the
> brushes and on\off switch. With an external relay controlled by the
> machine the on/off switch never gets used. The Bosch probably has
> soft start anyway.
>
> If you just need something to fill up your electric cabinet then put
> in a softstart circuit for the power supply and a way for the DC
buss
> to be rapidly drained on shutdown (dynamic load dump) and perhaps an
> OVP (overvoltage protector) circuit to shut things down and protect
> your motor drives in the event of a line surge or motor back
> EMF....then there is always the opportunity to add overtemp shutdown
> and electronic fusing (:-)
>