Re: [CAD_CAM_EDM_DRO] Kavo spindle inverter

Hi Dennis

I am assuming that your spindle is three phase. A few years back I had an
idea to use an automobile alternator (less the diode bridge) to generate the
power for a high speed spindle. I was going to drive it with a variable
speed DC drive and motor which should give the spindle variable speed. I
ran some tests with the alternator driven by the spindle on one of my mills.
As I recall the frequency was working out fine but the voltage, which would
be regulated by alternator field current, was short of the 160 volt that I
needed. This would not be the case for your application. I realize it's
not as clean a solution as a solid state high frequency inverter, but it
would be inexpensive.

What are the specs on the Kavo type 4444 inverter that you have? Thanks

Regards,
Bob

----- Original Message -----
From: "Denis Casserly" <denisc@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, November 29, 2004 2:44 PM
Subject: [CAD_CAM_EDM_DRO] Kavo spindle inverter


>
> Would anyone know of an inverter circuit that i could cobble together for
a
> 50000 rpm Kavo spindle model # 4050, it's specs are 24Volt, 100 watts, 83
to
> 833 hz, field windings are delta and .5 ohms DC each and it is an
induction
> motor as opposed to permanent magnet. I have a Kavo type 4444 inverter but
> it's not a good match for this spindle if anyone is interested in buying
it.
> Thanks, Denis
>
>
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