Re: About MOTs..

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Mercurus2000" <mercurus2000@xxxxxxx>

Hmm, how can you tell when a MOT doesn't require current limiting?
Adam
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, April 08, 2005 7:47 AM
Subject: RE: About MOTs..


> Original poster: "Mark Dunn" <mdunn@xxxxxxxxxxxx>
>
>
> Adam:
>
> The Primary side of the large MOT is not insulated well enough to handle
> the ~2000 volts that you will try to run it at.  It will arc to the
> core, arc across the windings, etc.  Most MOT's need current limiting.
> There are a few that don't.  I think in your special application you
> will require it.  I have built current limiting inductors for my MOT's
> and can give you guidance.  My typical MOT Primaries draw 50 to 75 amps
> at 120 VAC with the secondaries shorted.
>
> You would be better served to use the 1000 watt MOT alone and build a
> voltage multiplier for the HV side.  You will still need current
> limiting for this configuration.
>
> If you are trying to build a power supply for a TC I/We can point you to
> a number of websites that have used MOT's.
>
> Mark
>
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Thursday, April 07, 2005 6:30 PM
> To: tesla@xxxxxxxxxx
> Subject: About MOTs..
>
>
> Original poster: "Mercurus2000" <mercurus2000@xxxxxxx>
>
> This question has probably been asked before, I want to connect the high
>
> voltage output of a small like 600 watt MOT I have to the 120 side of a
> really large MOT like 1000w to get about 20-30KV out, I'll vacuum pot
> the
> MOTs in oil and cut the center ground on the large MOT to prevent
> arcing,
> does anyone see a problem with this? Will I have to use some sort of
> current limiting even tho I'm using a little 600 watt MOT for the
> primary
> transformer?
> Adam
>
>
>
>
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