Re: High freq. motor

--- In CAD_CAM_EDM_DRO@y..., "rekmac" <rkonnen@t...> wrote:

> I was wondering if anyone would know how to power a high frequency
> motor? I I obtained one that is for a PCB routing machine and
>thought
> if I can get it running, that it would be perfect for a router
>table
> I would like to build. It's a 1hp motor, I believe 400Hz.
> Any thoughts,
> Richard Konnen

Richard you should have no problems here as your motor is designed
for 400 hz and not a standard motor trying to run over speed.
A VFD [ Variable Frequency Drive ] or Invertor is the way to go.

I have a lot to do with Invertors and also HF drives. I would suggest
you have a look and see if you can get a current model at a price you
can afford as these have come on in leaps and bounds over the last
two years and the models on Ebay are clunkers in comparision to the
newer models. Prices hve fallen slightly but you are getting more
features for your money.

Things to watch out for if you go the older route. It must be able to
get up to 400hz. Many can only reach 120 or 200 hz.
Make sure you get the programming keypad with it. A lot of the time
these are expensive extra's.

Do some homework and have a look around. With a current unit you get
factory support and a host of features.
As an aside I have recently changed Invertor suppliers again. I am
now buying the latest 2 Hp single phase invertor for less than these
derated ones on ebay and less than I was paying 2 years ago.
These things are magic compared to even last years model. Plug the
motor in and start up . They do a self test and program themselves to
the motor demands. As the situation varies as regrads sped and torque
they keep altering the programming automatically to compensate.
We have a 1Hp test unit that is running permantly at 150% overload
into a 1.5 Hp motor 24 /7 for the last 3 months with no problems.

John S.