Re: Synchronism

["Malcolm Watts" <M.J.Watts-at-massey.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

On 10 Aug 00, at 12:13, Tesla list wrote:

> Original poster: "acmnovak" <acmnovak-at-email.msn-dot-com> 
> 
> Yes, It's me again ; )
> I have a question about DC TCs...
> If you have a power supply that has a high current, say 300 mA, with a
> reasonable voltage, 12kVdc, and a MMC with a capacity of .03uF, couldn't you
> run your coil in synchronism using a non salient pole motor? A break rate of

In this case, you tune the charging circuit resonance to the 
available break rate. In an AC system, you have to live with 
Fmains and an asynchronous motor slips relative to the mains.

Regards,
malcolm

> 120-150 bps would yeild synchronism right?
> I liked Greg Hunter's MOT supply, but I also noticed that he blew his MMC. He
> was using seacors with a dv/dt of 4000. I think, since he was using an air
> blast gap, his brak rate went as high as the transformer would let it, thus
> over-discharging the caps. He said they "blew up" on his webpage, so I'm
> guessing that heat built up in his caps (which have a plasic casing might i
> add) then they simply exploded. 
>  
> I'll be using a similar setup with a MMC with a dv/dt of 2700... However,
If I
> keep the bps limited with a good rotary gap, then my MMC should keep nice and
> cool. Right? Also, a good safety gap would be necessary to keep the MMC
within
> it's voltage rating. 
>  
> Does anyone on the list have a pair of identical MOTs complete with
capacitors
> and diodes they would be willing to part with? If not does anyone know of a
> source for them? Here in LaCrosse, WI where I live, the city is kinda anal
> retentive about their junk. We don't have a scrap yard within 60 miles of my
> house : ( When people throw away stuff like microwaves, they have to pay big
> buck to get rid of them, but the city doesn't let me take any "off their
> hands".
> If you can help me out with this, contact me off-list at <
> <mailto:acmnovak-at-msn-dot-com>acmnovak-at-msn-dot-com >
>  
> Thanks everyone,
>  
>         -Michael