results & Advice on tuning

[faramog]

I finally recieved the larger pots I wanted 2-3w and power resistors, so decided to isolate each coil and tune for optimum. The SSG starters guide (II) has a couple of methods so I followed the simplest (RS). I was suprised, as I expected resistance to be higher, but having tuned each coil, some interesting results.

Coil 1, original bifilar 168 ohms, input current circa 380 ma
Coil 2, trifilar, one trigger feeding two transistors, resistance 89 ohms, input current circa 910 ma
coil 3, trifilar, one triger feeding two transistors, resistance 130 ohms, input current circa 750 ma

Transisters are all MJL21154
Input current is the supply current when the other two coils are switched out.

Put it all together and:
Original (pre-tuning)
input current circa 2.3A, rpm circa 150 (51ma per magnet pass)

On my (much better) near condidtioned battery (88AH):
input current is 1.91A, rpm 238 (27ma per magnet pass)
On my worst battery (90AH)
input current is 1.65A, rpm 230 (23ma per magnet pass)

Instead of multiple pulses per magnet pass (mostly 2), I get one very clean and much more powerful (in amplitude) pulse.

I suppose overall I was expecting a lower current as its still circa 350-400 ma per power coil.

Thoughts anyone ?

Any better ways to tune, or factors to investigate ?

Thanks

[Farmhand]

How good does it charge ? Or condition ?

Do you have a trigger winding on each coil ?

Sounds pretty good to me.

[faramog]

One trigger on each coil. Single weakest output.

First large battery had some radiant but not huge amoubts, but has had several days with thus system. As the resting voltage rose i used it as source for the second large one. Similar effect as resting viltage rose then suddenly fell. Charge voltage and current higher in keeping with the desulphation and resistance lowering. Going to note first proper discharge & charge details shortly and see where it is. Originally, the first full charger charge of big 1 held a 30w load for about an hour... rubbish...

Problem is i am already working out looking at generator couls, rebuilding the axle with new bearings... and a dozen other things..... kind of addictive !!

[tecknomancer]

sounds like your hooked

One trigger on each coil. Single weakest output.

First large battery had some radiant but not huge amoubts, but has had several days with thus system. As the resting voltage rose i used it as source for the second large one. Similar effect as resting viltage rose then suddenly fell. Charge voltage and current higher in keeping with the desulphation and resistance lowering. Going to note first proper discharge & charge details shortly and see where it is. Originally, the first full charger charge of big 1 held a 30w load for about an hour... rubbish...

Problem is i am already working out looking at generator couls, rebuilding the axle with new bearings... and a dozen other things..... kind of addictive !!

Yea I had the same thing happen on the cart motor I added 2 18,000uF caps to the input stepped up 120V input. not sure of your scale but the cart motor is firing sequentially 12 coils 25" wheel 22neos (with a 4.7 Ohm trigger ) input is 3 amps at 120V output is 22 Amps at 12V at 950 RPMs charging 8 44ah battery's in parallel

[faramog]

Serious amount of power there dude !

Caps on the source battery ... is this more of a fast buffer to allow the batteries to start supplying ?

I suppose it would alter the soyrce impedance but nit sure that matters.