Hi Spinner.
I've not aproached the jerry/riged idea from an exsisting 12 volt genny.
I've been involved with audio and electronics since the early sixties.
The idea of 2 coils that produce an ac voltage/amperage work well together while out of phase with each other just doesn't fly for me.
Its most likely to do with my involment with audio or building thousands of power supplies over the years.
I use single phase as a referance in the discusion of combining the ac output of the coils involved with the PMAs that we as a wind power group use to charge batteries.
The large porportion of this group uses the dual rotor disc alt some are useing converted ac motors a very few are using car alts. There are also the smart motor types like the Fisher & Paykel and the GE ECM. All of these formates are or can be 3 phase ac to DC PMA.
The power from the idividual phase are combined to one end product DC through the use of rectifiers.
The normal combineing method is either Delta or Star. Each has its own addvantages and liabilities.
Delta is thought of have higher amperage but lower voltage. Therefor suited well for high wind speeds. Star is thought of haveing higher voltage but lower amperage therefor suited to lower wind speeds.
Some folks have set about taking addvantage of both conditions by building a star to delta switching system according to wind speed and power available in the wind.
Some have prefected this method either automaticly or manualy.
The problem I've have with star and have stated so many times is the loss of both power and voltage.
Let me rehash my thinking.
In single phase two 10 volt 5amp amp coils wire in sires produces 20 volts 5 amps.
Take any to coils of 3 phase that are producing 10 volts at 5 amps and wire them in sireies you get 17.3 volts at something less then 5 amps(star). It has been sugjested that this is not a fair compairison because star needs a few extra turns of wire to make up for its voltage loss.
I did this (a few more turns for star) and stars output was still less.
Because there has to be a diferance in coil turns count and wire gage a direct compairison is not posable using the same coils.
My sugjestion and what I did was to wind coils for 20 volts at 2.5 amps. These coils then have there own and seperate fullwave bridge rectifiers, the DC outputs of the bridges were wired perelell. The end result of this was no voltage, amperage, wattage losses do to coils working with other out of phase coils.
The Idea here was to use the exact same amount of copper wire in weight but get rid of those out of phase losses.
It works great for me and I'll use no other power waisting system. I'll get all the power that my magnets, copper and money are capable of.
If other folks wish to buy a V8 and pull a sparkplug wire or 2 thats fine. Its a free country.
Unfortunatley we can't make that direct compairison between delta, delta/jerry riged and star. Coils must be diferant to work at tha same voltage.
You may recall my test of the 12 volt GM car alt. Stock it was wire star. I removed the stock star stator and replaced it with a 24 volt GM stator and wired that jerry/riged and had much higher power at 12 volts then the stock 12v star.
My other test with other types 3 phase alts had symular results.
Even in a wind test same blades same alt.
I'm building a couple new dual rotor disc alts. One is an exact replica of the 8" dual rotor genny except it will have 150 turns of 20ga wire as aposed to 250 turns of 22ga. wire.
I think this should satisfy the star folks as to the extra turns star needs to overcome its voltage losses.
This alt will be wind tested directly against the jerry/riged alt with the same blade.
These are both 9 coil 12 magnet alts.
But first I want to finish this littel 6.625" 8 magnet 6 coil alt.
I did a littel work on the rotor today. The rotor is glueing tonight.
I'll post more pix on the littel guy with progress.
JK TAS Jerry
