D
David Lesher
- Jan 1, 1970
- 0
So Click & Clack's Puzzler this week
<http://cartalk.com/content/puzzler/transcripts/200918/index.html> was
"given a dead battery, 120vac generator, and an electric drill; how do
you get out of the woods before the bears get you..?"
I'm sure the Tappet Brothers answer involves spinning the alternator with
the drill. That's possible but slow; the average drill does not put out
all that many kilowatts.
Other discussions in rec.craft.metalworking touched on disassembling the
alternator for its diodes. But someone pointed out you do not need to
disassemble the alternator at all.
<http://www.eng.cam.ac.uk/DesignOffice/mdp/electric_web/Exper/05019.png>
Instead:
1) Disconnect the alternator output lead from car harness..
2) Put the following in series:
Alternator output to Generator AC out [N]
Generator AC out [L] to Battery Positive term
[With battery ground->alternator frame completing loop]
3) Fiddle with generator throttle to get idle speed, ergo less
voltage. Start...
One of my concerns is the PIV rating of the alternator diodes. Any
comments on a) what kind of ratings alternator diodes will have b) what
they should have in this misapplication....
<http://cartalk.com/content/puzzler/transcripts/200918/index.html> was
"given a dead battery, 120vac generator, and an electric drill; how do
you get out of the woods before the bears get you..?"
I'm sure the Tappet Brothers answer involves spinning the alternator with
the drill. That's possible but slow; the average drill does not put out
all that many kilowatts.
Other discussions in rec.craft.metalworking touched on disassembling the
alternator for its diodes. But someone pointed out you do not need to
disassemble the alternator at all.
<http://www.eng.cam.ac.uk/DesignOffice/mdp/electric_web/Exper/05019.png>
Instead:
1) Disconnect the alternator output lead from car harness..
2) Put the following in series:
Alternator output to Generator AC out [N]
Generator AC out [L] to Battery Positive term
[With battery ground->alternator frame completing loop]
3) Fiddle with generator throttle to get idle speed, ergo less
voltage. Start...
One of my concerns is the PIV rating of the alternator diodes. Any
comments on a) what kind of ratings alternator diodes will have b) what
they should have in this misapplication....