from an alternator, and the possibilities for an AC alternator to be

used to power a tesla coil....

--- Tesla list <tesla@...> wrote:> Original poster: "Jim Lux" <jimlux@...>

At one time I had three high induction coils that

>

> I've been running some interesting simulations, in

> respect of having 3

> basically identical (but slightly different) coils

> running simultaneously,

> near each other, to see if you could get triangular

> or Wye sparks.

normally exhibited a Q of ~8, these were placed as a

delta within a delta inside outer components of .15

henry, 12 ohms 14 gauge coil groups, that when 180

phased can supply an open circuit Q of 45 between the

coil systems. The 1000 ohm induction coils then supply

a q of 8 times that outside voltage range, which of

course slightly drops when placed between a

interphasal voltage range. So for this three phase set

up obtained from a 15 volt stator of a AC converted

car alternator source, generally a loaded high

induction coil inner phase will input 600 volts,

becoming 8 fold that value in its midpoint voltage

rise, (~4800 volts). Having three of these inner delta

series resonances, it is easy to light 20 inch neons

arranged either in delta of wye across the inner

voltage rises. But arranging a three phase arc gap

proved problematic, so that the arc once it had

assumed itself across two voltage rise terminals,

would then prevent or somehow take up all the

available inner voltage rise, so that making a

coherent three phase arc gap proved impossible. Later

studies using a total of 13 simultaneous meter

readings involving

1) the stator voltage

2,3,4) - 3 stator line amperage readings

5,6,7) - Delta 3 phase amperage readings

8,9,10)- Delta 3 phase internal voltage rise readings

11,12,13) Inner Delta 3 phase interphasal voltage

readings

These readings containing 13 meters showed that the

phase angles were not being distributed properly so

that one phase was acting weakly, apparently due to

its lack of mutual induction with the other phases,

with respect to how the outer delta series resonances

are arranged. This in turn of course may have effected

the disfunction of the three phase arc gap, and the

importance of procuring a 13 meter reading is obvious,

where we then have two and not just one method to

determine the phase angles, both by comparing the

stator line delivery currents to the delta arms it

serves, and also the increase of interphasal voltage

readings as referenced to the outside voltages of the

phases themselves.

Before this time, the study of alternator source

frequency resonances has been relegated to myself, as

I dont exactly know anyone else doing this because of

the expense of the components. I have been at this for

about three years, and during this time replicated a

480 hz CW Tesla coil set up that uses multiturn

primaries and secondaries. Very amazing things have

been learned, and now it is time to say a significant

developement has occured on the drawing board, which

will significantly decrease the cost of resonant rise

schemes, so that now Tesla Coilers will now have a

special reason to attempt their own alternator 3 phase

schemes. Having procured a 3 phase high voltage

transformer, I will be able to test out this circuit

on a 3 phase TC primary and go from there. But the

foremost question that first needs to be adressed is

how much power can the alternator output? This will

tell us whether our project is even valid from the get

go... A medium voltage range stator is 14 volts, and

we can go up to 30 volts for short time periods to

power our TC. Lets see whats obtainable using 2 nf for

a TC primary. Remember 480 hz is 8 times the frequency

of 60 hz, also giving the capacity 8 times more energy

transfer, so a smaller capacity is equivalent to a

larger one at a lower frequency energy transfer wise.

If we input 14 volts into a 62 fold voltage rise made

by a 10 KVA pole pig, we can expect only 868 volts

secondary output. An open circuit reading of 14.6

volts stator when shorted is reduced to 4.25 volts

enabling 8.5 Amps, thus Z(int) of the stator phase is

.5 ohm. The ohmic value of 2 nf @ 480 hz would be X(C)

= 1/[2pi*480*000000002}= 165,870 ohms, thus demanding

a supply of 5.23 ma on the secondary@ 868 volts with a

primary amperage demand of .324 A, a small quantity.

Now according to some electrical laws set forward In

HW Jackson's treatise on maximum power transfer, the

current found on the short should be twice the current

found at maximum power transfer, which also occurs as

a consequent 50% drop in the output voltage. So for

those laws, we can assume that the 14.6 stator voltage

should drop to half that value at 7.3 volts and then

enable only a conduction of 4 amps at maximum power

transfer, which is only a meager 29 watts! Luckily for

us however those laws dont seem to be valid in

procuring a single of three phases of the alternator,

and besides this later developements show

contradictions. And as I recall I have extracted 400

watts through three sets of 12 ohm resonances formerly

so I would set that as the top limit.

One should understand that to gain sensible operation

of the alternator, we need to resort to schemes

whereby amperage is extracted at the lowest possible

stator voltage, where 14.5 volts here is a midrange

voltage value. One might be surprised that if we turn

up the stator voltage to a 30 volt level, due to its

very inefficient delivery where stator saturation

factors start to act, the alternator will get hot even

with no loads attached! Internal circulation of stator

currents do occur as a loss factor. So here before us

the first TC obstacle is the lack of secondary voltage

from the transformer, and also the lack of primary

amperage demand with a 14 volt stator. Since

ferromagnetic voltage rise transformers in excess of

the pole pig 62.5/1 ratings are not a common item, and

because of the fact that our amperage demand at the

sensible 14 volt range is very small, these are

impossible sounding obstacles, but an option now has

appeared on the horizon.

This is a resonant current ballasting of a pole pig

primary using pairs of Radio Shack Megacable Speaker

wire. For a sensible RCB, unfortunately we are lowered

to the inductance enabled by the length of wire having

the resistance identical to the impedance of the

source. We say unfortunately because the amount of

current limiting taking place may be in excess to what

our needs call for, in which case the unballasted

version is compared to. Thus here what I am

essentially saying is that drawing on a single phase,

we can construct a maximum power transfer circuit as

we understand it and by additionally resonating that

circuit by the inductance generated in the coil form

we can in fact create a voltage rise circuit

equivalent to the demand circuit in terms of the

sources current limited ability to deliver current.

Once we have constructed two of these circuits

inversely, by a three stator line connection where the

120 phasing is converted to 180 by mutual induction of

inductive components; the placement of a load across

the voltage rises is current limited to the amount of

reactance found in any of the components, which is an

entirely different value then when they are in

resonance when conduction near ohms law are

contemplated. The continual presence of the

interphased load, which is the resonant current

ballasted pole pig primary, insures that the circuit

never actually consumes its maximum amperage delivery

because of that load, and the next step therefore

becomes calculating the output voltage and amperage

demand of a 2 nf secondary cap. but meanwhile...

The results of this for a single 4 layer megacable

series, is that when the spirals are made bifilar

opposite windings, but currents enabling magnetic

fields in unity the currents found on the resonance

are actually 98% of the currents found on a short of

the circuit! Alternator RCB is the placement of two of

these outer delta series resonances of maximum power

transfer at resonance, across only two of the three

available delta three phase outputs. It is found that

by mutual inductance of 120 phased series resonances,

that their 120 phased action is easily converted to

180 at no losses of the newly derived stator voltages.

And therefore these coils then can act as bipolar

series resonances of maximum amperage demand on either

side of the pole pig primary, and the voltage rise

ratio of each of these 4 layer spirals can be

predicted as 6, for a 12 fold increase of input

voltage where 14 volts is then increased to 168 volts

input to pole pig primary, making 10,416 theoretical

volts available on secondary, which for 2 nf would

enable a current of 62.7 ma creating a demand of 3.89

A on primary. So the problem now becomes to see what

the RCB can supply at short, and this is estimated by

the impedance of 3 mh found on the 4 layer spiral...

This works out to 9 ohms @ 480 hz, so a 14 volt stator

would be limited to 14/9 of 1.55 A current regulation

at 14 volts. One will need a supply of almost 4 amps

to enble a 2nf cap at these cited values, so the best

that could be hoped for is that for in this scenario

there seems to be a tradeoff involved in that using a

preliminary voltage rise circuit will simply not

function to provide that amount of voltage rise, if in

fact the supply cannot meet the demands, however it

seems the voltage rise circuit could still rise to the

amount of demand allowed for when the primary COULD

conduct at values near that limit. This would be a

mere 24 ma on secondary, or about a 4000 volt delivery

to a 2 nf cap. Actually then that isnt really that

bad, since for a 15,000 volt NST @ 30 ma current

limitation, a 5.3 nf cap rating is its resonant value,

thus at 8 times the frequency and almost 1/3 the

voltage the energy transfer rates might be comparable.

And of course we can still amp out the field of the

alternator to get a 30 volt stator primary for short

duration 8000 volt secondary operations. But the

really unique thing this RCB setup gives is for the

possibility of effective quenching of an arc gap

however. This is because if we replace the pole pig

primary as a load to this circuit with a short, the

projections show that at this 14 volt stator, a

current of 1.5 A will be across the short, however

because that short converts two series resonances to a

single tank resonance, that 1.5A amperage circulation

would only allow .15A into the loop, given a forcasted

q of 10 and the increased impedance of the tank loop.

This means that if the secondary arc presents itself

as a short to the supply, the voltage across the

primary goes back down to its supply stator levels.

I will try a alternator RCB of a 10 KVA tranformer

first with a 20 inch neon disharge and then with an

actual 2 nf cap- primary and arc gap. In these

situations it is clearly advantageous to use RCB,

since it nominally acts as a voltage rise component to

an infinite load, but at the same time can act as a

load within the confines of a tank circuit at maximum

amperage demand. To clarify the difference here a

simple reactive ballasting only reduces the possible

amperage delivery to the primary of the transformer,

and that limit is set by the ohmic resistance of the

limiting factor. In this case there are situations

where a unballasted primary will allow more current to

be assumed then would be consumed by its regulated

counterpart. This is of course only common sense,

without the current limiting factor in series, there

is no current limitation. Thus again we say that the

unballasted version can contain more amperage then the

ballasted. In contrast the RCB regulation instead will

allow a HIGHER amperage input to occur on account of

its ballasting; then what the unregulated version will

allow for, and it does this on account that it also

functions as a voltage rise component in the

situations where the supply apparently exceeds the

demand of the secondary. However a distinction is made

then for the unballasted version, a secondary short

then would mean more current in that comparison,

however the RCB will see such a short as a high

impedance load change to the stator inputs. In

contrast a short of the secondary tranformer of an

ordinary primary ballast scheme will give its maximum

conduction values on the primary, but on the RCB the

stator demand does not see those low impedance values

at a short, but rather Q times the tank circuit Q's as

a difference between amperage demand conditions

between open and close positions of midpoint amperage

conductions.

Sincerely HDN