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*To*: tesla-at-pupman-dot-com*Subject*: Re: 3 Phase power supply...*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Fri, 10 May 2002 18:27:47 -0600*Resent-Date*: Fri, 10 May 2002 18:42:21 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <gFB3_.A.5rH.sjG38-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "harvey norris by way of Terry Fritz <twftesla-at-qwest-dot-net>" <harvich-at-yahoo-dot-com> --- Tesla list <tesla-at-pupman-dot-com> wrote: > Original poster: "Albert Gruzs by way of Terry Fritz > <twftesla-at-qwest-dot-net>" <Gruzs-at-activatormail-dot-com> > > Hi All, > Has anyone ever attempted to run a TC with a 3 phase > power supply? Yes, I have done some research using three phase stator WYE output of an alternator, BUT this is made at 480 hz. Because the typical car alternator has 7 pole faces per rotation, at an average sensible speed you are already 8 times the 60 hz frequency. What this also means is that if you simply hook up a 30 ma NST to a single phase of the alternator inputs, its former current limtations will now be 8 times as high, thus initially the transformer being used should NOT be current limited, so I was able to produce alternator /10kva primary arc gaps but not with an NST, even though its voltage rise was twice that of the pole pig. Thus then you have to figure a method to ballast the pole pig, (if even at all necessary!) Now I am pursuing an entirely different scheme to run a TC, by actual source frequency resonance alone to produce voltage rise! The pole pig transformer undoubtably is still a possible candidate for alternator TC work, but for now I am trying this by air core induction coils alone, where it takes a while to explain how all three phases are incorporated for one voltage rise, at very improved efficiency to the transformer case; but here I can start by showing the operation at 15 volts from a 3 phase alternator. The 1.05 nf cap by reactance laws will have 1000 volts across is plates when 3.16 ma conduction occurs, and in this jpeg a 20.3 ma conduction would be ~6400 volts, about a 426 voltage rise from a 15 volt stator: also made with the limitation of a one ended neon attached to the voltage rise.(The voltage rise would be higher if this one ended neon were not in place) http://groups.yahoo-dot-com/group/teslafy/files/RI/Dsc00178.jpg The way all three phases are used is that two of the stator outputs are placed across 12 ohm resonances to procure a voltage rise on each of those resonances, based on the q made by .15 henry coils -at- 480 hz. At the middle point of each of those Delta Series Resonance, (DSR's) we add a high induction coil and plate capacity needed for its source frequency resonance, which makes a further q fold voltage rise inside that circuit., as what we call a interphased resonance. The needed C plate capacity value will also be the C to be used in the tesla primary, where then its value is not negotiable in the TC tuning, so the L of the primary must be varied to meet the TC secondaries resonance. Now typically from three phase laws, we should think that the voltage across the interphasing resonance will be 1.7 that of each side alone, so here a 15 volt stator enables 364.4 volts across the resonant interphasing. That explains how two of the three phases are used. Now the high induction coil also has a real acting q of 8, so ordinarily by the two phase application method the last voltage rise will be 8 times that inputed, here approximated as 2900 volts for that input. Two accomplish this side of the three phase: uses twenty 14 gauge coils for the two DSR's which is quite an expense, along with the high induction coil! But so is a pole pig expensive, that will NOT even deliver easy results at 480 hz! Now where the 3rd phase comes in is by using only a single 14 gauge coil, tuned for producing magnetic opposition to the high induction coil, by placing both of these in mutual interaction in space. That DSR1 coil will actually cause the 8 fold Q of the high induction coil to rise to ~6400/365 = 17.5 times the voltage being inputed by the two phase interphasing resonance. If we remove this DSR1 coil from the pole while in operation, the voltage across the high induction coil resonance will go up, but the resultant internal voltage rise will go down back towards the normal Q of 8,(the limitation of interwinding capacity of these 9 mile 23 gauge coils at 480 hz)) with the net results that the magnetic opposition method actually produces the best voltage gain. So here we can estimate 1 amp consumptions for the 12 ohm resonances at 15 volt input, and see that the DSR1 (1 0hm resonance that does not come to full conduction by internal stator resistance limitations), where the reactive power input is ~ at (2+ 2.75) Amps* 15 volts = 71.25 VAR Now let us compare what a ferromagnetic transformer will have to input to achieve this same conduction of 20.3 ma across a 1 nf cap, where the ratio 6400/15= 426, thus it would take 8.6 amps at 15 volts -at-480 hz using that transformer ratio to accomplish the same output. About 80 better efficiency in this example, without even noting the drastic transformer drops of efficiency at 480 hz! But things do not stop there at all. This is because we have not even started to compare the 60/480 frequency differences themselves. To cause this same 20 ma conduction of a meager 1 nf cap would need some 51,000 volts at 60 hz! Thus while a TC primary design using only 1 nf sounds vary small, one must also realize that it can make the same energy transfer as a 8 nf cap at 60 hz. Thus TC designs using smaller capacities, and inhererent higher frequencies of operation,(smaller coils) become more feasible with these higher frequency inputs. However I dont have those things available at the moment, so I am using a unconventional TC secondary and will add primary winds as tuning this coil commences. The secondary also uses 14 gauge wire, being 272 turns on 20 inch diameter sonotube, being h/d only 1.5, and also having only 4 ohms and 20.5 mh. This secondary has 1500 ft of wire, but because of the low h/d ratio, and inefficient wire gauge I have no idea of what its resonant frequency will be. The vaying inductance tries of primary will be in parallel to the plate cap charging by 3 Phase resonance, with an arc gap in the loop. I have figured for 300,000 hz I would need .28 mh in the primary, and for 200,000 hz, I will need .63 mh in the primary. The quaterwavelength freq for 1500 ft is about 160,000 hz. Anyone got ideas of which frequency to try for starters? HDN > I'm not sure, but this would probably require 3 > separate tank+primary circuits > (kept in proper phase alignment, of course). That is something that can be tried later, where the consideration of three tanks sharing the same arc gap seems feasible also, but this is totally different from what I am doing here, to use all three phases to produce a single phase of voltage rise. > If throwing 3x the wattage onto the input(s) didn't > boost output; I don't know > what would. > > Have a good day, Albert. > > > ===== Tesla Research Group; Pioneering the Applications of Interphasal Resonances http://groups.yahoo-dot-com/group/teslafy/ __________________

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