(quoted from post at 07:28:01 09/09/15) Trick question....
With a totally dead 6V battery/generator/regulator system,
how fast will you hafta tow the vehicle before it starts?
(quoted from post at 08:12:43 09/09/15) I'm betting the dead battery will zap any power the genny could make and it will not have any power left to fire the ignition. Unless you have a magneto.
hat makes more than one of us!(quoted from post at 09:54:12 09/09/15)(quoted from post at 08:12:43 09/09/15) I'm betting the dead battery will zap any power the genny could make and it will not have any power left to fire the ignition. Unless you have a magneto.
I'm betting you just made an incorrect statement. I've successfully tow started a tractor with a dead battery that had a dist.
rom the generator, the same as if it had a charged battery.(quoted from post at 16:29:32 09/09/15) Ok, Ok, OOOKKKKAAAYYYY!!!!
I didn't specify gas or diesel.
I was thinking gas with a TOTALLY dead battery.
Where does the regulator get current to pull itself in,
in order to feed the coil? There's no wrong answer.
ice story ending. I see no question, however.(quoted from post at 16:54:46 09/09/15) Helped a friend unload a Farmall Cub from the trailer, that he had just bought.
It had been sitting for more than 5 years. I suggested they remove what gas was in the tank & carb and put fresh. They did. Suggested they charge up the 6V Batt. cuz it won't start with a dead batt. Didn't have a 6V charger. Gonna jump w/12V boost charger. I suggested they pull the wires off the regulator. They Did. Pulled the cap off the dist & bussed the points. Hooked wires back up to regulator.
No joy. So... they hooks onto the thing, and pulls it round and round his 5 acre field, till gas was running out of everywhere. No joy. By the sounds of the fan, they were pulling at least as fast as full bore speed.
Next day, set a charged 12V Bat. in there, unhooked to wires to regulator and Vroom!
From what I have read a DC generator will self excite because of residual magnetism in the field poles. The initial current formed must reinforce the field in the poles in order for any current to build. As the armature continues to spin emf builds up in it as long as the voltage in the armature exceeds the voltage drop across the windings of the field coils.
Hey it sounded ok when I read it.
I skipped some of the verbage to advance the plot.
I still think you have to remove the + terminal from the battery so that it does not sink the resulting emf. It would help if you had an electrolytic cap across the output. Once cranked you need a resistor in series to the battery to keep the engine running and slowly charge the battery or as said earlier the battery should be put on a charger back at the barn.
Also would there be much residual magnetism in tractor sitting in the field for five years as olddog said?
I guess you could point it North South and beat on it lightly for a few minutes with a tire iron.
(quoted from post at 09:51:59 09/09/15) Dead battry with a coil and generator and you can tow fast enough it should start. Now STONE dead you may not win. Alternator you are toast. They will not pick up like a genny. They need something like 7 or 8 volts and then they will charge like **** to the wall. The charger from wally world that costs $20.oo will desulfate your cells and I have saved a couple of batteries.
(quoted from post at 19:08:22 09/09/15)
If the battery is totally dead you can not start the machine by pulling it as there is no way to excite the generator.
im, I'm afraid that there are too many 'theorizers'/'over thinkers' in this thread instead of those of us who have simply done it. :roll:(quoted from post at 12:42:26 09/10/15)(quoted from post at 19:08:22 09/09/15)
If the battery is totally dead you can not start the machine by pulling it as there is no way to excite the generator.
Unlike alternators generators don't require electrical excitement to charge as they make their own excitement.
(quoted from post at 16:45:58 09/10/15) A one wire Delco alternator doesn't need a battery to excite the fields to get it to start charging but as a safety precaution most regulators will not allow the field to ground unless there is voltage on the #2 terminal. Since the output terminal and the #2 terminal are tied together in the one wire regulator with no voltage on the output terminal the alternator will not start to charge.
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