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Re: "DC drive"
Edward V. Phillips wrote:
> Subject: Re: "DC drive"
> GL wrote:
> > The resonant charger is a 2.5H, 10A, 28kV reactor in series with the output
> > of the rectifier stack, which gives the charging ckt a ringing frequency
> > of about 150 Hz (Cpri = 0.495uF).
>
> Wow! That is really a setup. Where did those parts come from,
> how much do they weigh, and (it's really none of our business) how much
> did they cost? A friend of mine at a former place of employment designed
> and built a 1.3 henry, 1000 amp inductor. The mechanical design alone
> took months.
>
> Ed Phillips
I was fortunate enough to find a de-commissioned klystron test station at a
scrapyard in San Francisco. This station was used by Varian/Eimac to test
their XK5 class 50MW klystrons, and included the gun utilities, vacuum pumps,
and a 100kVA pulsed modulator system [360PPS]. The guys there said that I
could have all of it, except for the vacuum equipment, if I would repair their
large hydraulic trash compactor. It was a dirty job, but well worth it IMO.
The reactor listed above is roughly an 18" cube, and weighs about 150 lbs.
The 3-phase DC supply section weighs about 1200 lbs.
The primary circuitry and rotary gap weigh about 1100 lbs.
The secondary coilform w/toroid weighs about 500 lbs.
Yes, I'll bet that 1kA inductor was quite a project! 650,000 Joules of stored
magnetic energy is nothing to sneeze at! The reactor on my coil only stores
125 Joules max. What was such a huge inductor used for?
-GL