Re: SSTC and the Current Drive Ring (IDR) Concept

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

http://www.mag-inc-dot-com/pdf/ferrite_p_material.pdf
for what it's worth..


Tesla list wrote:
> 
> Original poster: "Marco Denicolai by way of Terry Fritz
?twftesla-at-qwest-dot-net?" ?marco.denicolai-at-tellabs-dot-com?
> 
> Hi Dave,
> 
> It is hard for me to understand how a magnetic core sized as a
> ice-hockey puck can handle powers in the range of 10 kW...
> 
> I was lucky to put my hands on the toroids used in the Thor HF filter.
> They are a kind of esoteric stuff: tape wound cores, o.d. about 5",
> permeability 17000. Well, they can handle up to 11 kW, but at a
> frequency of 20 kHz.
> 
> With more usual parts: a 10 kW push-pull transformer (ferrite) will
> measure 6"x5", will weight 7 kg and will work at 20 kHz.
> 
> I suggest you to ask the Magnetics guy for their 'P' material datasheet
> (and cores datasheet). Please, email those to me privately. If that
> material is really capable of what the guy says, I could be interested
> too.
> 
> Best Regards
> 
> Tesla list wrote:
> ?
> ? Original poster: "David Sharpe by way of Terry Fritz
> ?twftesla-at-qwest-dot-net?" ?sccr4us-at-erols-dot-com?
> ?
> ? I gotten in touch with Magnetics, Inc. in Pennsylvania, USA.
> ? They are a major supplier of high power high permeability
> ? magnetic cores for SMPS industry.  A
> ? 2.25" OD x 1.5"ID x .75" thk. toroid (epoxy coated, 'P' material)
> ? is capable of handling up to 12.5kW -at- 250kHz, and
> ? ~7.4kW -at- 100kHz. Heating limited to 25 deg C above ambient.
> ? According to app. engineer, several kA in drive ring NO
> ? PROBLEM with off-line 1/2 bridge topology.  Cost, ~$40.00
> ? US ea. in qty of 10.  So it's just a matter of building something
> ? and trying it...
> ?
> ? Regards
> ? Dave Sharpe, TCBOR
> ? Chesterfield, VA. USA
> 
> --
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