RE: MOSFET/IGBT power supply (ripple)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

The Cadillac of low ripple x-ray power supplies is a 12-pulse rectifier
supply. An x-ray service technician told me that the twelve diodes alone
cost over $2000. If one had three phase power, I wonder if a 12-pulse system
could be assembled using six mots, suitable diodes, and perhaps a smoothing
capacitor. But really there would probably be little advantage to using such
low ripple supplies for tesla coils, except for experimental coils from
which to take measurements. 

Godfrey Loudner 

> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Friday, June 21, 2002 12:45 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Re: MOSFET/IGBT power supply (ripple)
> 
> Original poster: "David Huffman by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <huffman-at-fnal.gov>
> 
> For a full wave (6 diodes) three phase power supply the ripple is fairly
> low.
> The % ripple in RMS / average output voltage is only 4.2%.
> The ripple frequency is 6 times the line frequency.
> I just wish I had 3 phase coming into my home.
> Dave Huffman
> 
>