Generator Question

  • Thread starter Daniel & Kathy Gibson
  • Start date
D

Daniel & Kathy Gibson

Guest
Hi All.

So far so good on the axle problem. I aligned the drivers side today (off by one
spline),
re-installed it, and tried to start it, and the batter went dead. I think it is
due to me
test starting the car over and over, and not giving the generator a chance to
due its
thing, but I want to be sure. Using a volt-meter, is there an easy way to tell
if the
output from the generator is up to snuff on the car?

Thanks
Dan
 
E

Ed Price

Guest
----- Original Message -----
From: Daniel & Kathy Gibson
To: amphicar-lovers@yahoogroups.com
Sent: Saturday, April 12, 2003 3:26 PM
Subject: [amphicar-lovers] Generator Question


Hi All.

So far so good on the axle problem. I aligned the drivers side today (off by
one spline),
re-installed it, and tried to start it, and the batter went dead. I think it
is due to me
test starting the car over and over, and not giving the generator a chance to
due its
thing, but I want to be sure. Using a volt-meter, is there an easy way to tell
if the
output from the generator is up to snuff on the car?

Thanks
Dan


The charging system has two major parts; the regulator, which senses the system
voltage, and the generator, which tries to supply current to the system. If
either fails, the most likely outcome is a "dead" battery.

With a fully charged battery, the engine stopped, and no load, the battery
voltage will be about 12.5 VDC. Put some load on the battery, like a small light
bulb, and the voltage will drop just a bit. Put a heavier load on the battery,
like your headlights, and the battery voltage will drop even more. During a
really heavy load, like running the starter motor, the system voltage might drop
to 8 VDC or so.

The voltage regulator senses the system voltage, and sends some DC battery
current into the Field winding of the generator. The lower the system voltage,
the more current that the regulator tries to send. And, the more current in the
Field winding, the more the generator's armature voltage rises. When the
armature voltage exceeds the system voltage, current flows from the generator
into the system. Some of this current goes into the system loads, and some of
the current flows into the battery, where it does something called "charging".

If the generator cannot move enough current into the system, the system voltage
may never rise high enough for current to flow back into the battery. This will
result in you slowly draining the battery. If the generator has failed entirely,
then no current will flow into the vehicle system, and you will drain your
battery in a matter of just a few hours. If the regulator fails, it might not
"tell" the generator to put enough current back into the system, or it might
call for too much current, causing overheating or burn-out of lights and even
the battery or the generator.

The voltage regulator should be adjusted to maintain about 13 VDC in an
operating vehicle. This will create a balance of the generator supplying all
electrical needs, plus putting an amp or two back into the battery. Knowing
this, you can roughly check the electrical system with a voltmeter. Connect the
meter between ground and some convenient electrical point (the cigarette lighter
center pin is convenient).

With no loads turned on, you should see about 12.5 VDC.
Turn on the marine lights, and the voltage should barely drop a couple of tenths
of a volt.
Turn on the headlights, and you should still see about 12 VDC. Watch for a
minute; does the voltage keep going down? If so, your battery is either only
partially charged, or is in bad condition (or both),
Turn off all lights; the voltage should be back to 12.5 VDC.
Now start the engine. You should see the voltage really take a dive while
cranking.
As soon as the engine starts, and you release the key, the voltage should go up
to 13.5 VDC or so. In a healthy electrical system, this voltage will go back
down to 13 VDC or so within about minute.
Now, watch the voltage as you turn on various electrical loads. The regulator
should sense the new loading and make the generator increase its output almost
instantly. And then, when you shut off a load, the regulator should not allow
the generator to"overshoot"; the voltage should stay substantially constant for
all motor speeds and electrical loads.

If anything acts strangely during this test, it might mean a bad regulator,
generator, battery or wiring. The regulator voltage set-point can be adjusted,
but I would opt for a new one rather than trying to adjust spring tension and
contact positions in the regulator.


Ed
El Cajon
67 Rust Guppy


[Non-text portions of this message have been removed]
 
D

Daniel & Kathy Gibson

Guest
Ed,

Good stuff! I am about to start sorting it out. Thank you!

Dan

Ed Price wrote:

> ----- Original Message -----
> From: Daniel & Kathy Gibson
> To: amphicar-lovers@yahoogroups.com
> Sent: Saturday, April 12, 2003 3:26 PM
> Subject: [amphicar-lovers] Generator Question
>
> Hi All.
>
> So far so good on the axle problem. I aligned the drivers side today (off by
one spline),
> re-installed it, and tried to start it, and the batter went dead. I think it
is due to me
> test starting the car over and over, and not giving the generator a chance
to due its
> thing, but I want to be sure. Using a volt-meter, is there an easy way to
tell if the
> output from the generator is up to snuff on the car?
>
> Thanks
> Dan
>
> The charging system has two major parts; the regulator, which senses the
system voltage, and the generator, which tries to supply current to the system.
If either fails, the most likely outcome is a "dead" battery.
>
> With a fully charged battery, the engine stopped, and no load, the battery
voltage will be about 12.5 VDC. Put some load on the battery, like a small light
bulb, and the voltage will drop just a bit. Put a heavier load on the battery,
like your headlights, and the battery voltage will drop even more. During a
really heavy load, like running the starter motor, the system voltage might drop
to 8 VDC or so.
>
> The voltage regulator senses the system voltage, and sends some DC battery
current into the Field winding of the generator. The lower the system voltage,
the more current that the regulator tries to send. And, the more current in the
Field winding, the more the generator's armature voltage rises. When the
armature voltage exceeds the system voltage, current flows from the generator
into the system. Some of this current goes into the system loads, and some of
the current flows into the battery, where it does something called "charging".
>
> If the generator cannot move enough current into the system, the system
voltage may never rise high enough for current to flow back into the battery.
This will result in you slowly draining the battery. If the generator has failed
entirely, then no current will flow into the vehicle system, and you will drain
your battery in a matter of just a few hours. If the regulator fails, it might
not "tell" the generator to put enough current back into the system, or it might
call for too much current, causing overheating or burn-out of lights and even
the battery or the generator.
>
> The voltage regulator should be adjusted to maintain about 13 VDC in an
operating vehicle. This will create a balance of the generator supplying all
electrical needs, plus putting an amp or two back into the battery. Knowing
this, you can roughly check the electrical system with a voltmeter. Connect the
meter between ground and some convenient electrical point (the cigarette lighter
center pin is convenient).
>
> With no loads turned on, you should see about 12.5 VDC.
> Turn on the marine lights, and the voltage should barely drop a couple of
tenths of a volt.
> Turn on the headlights, and you should still see about 12 VDC. Watch for a
minute; does the voltage keep going down? If so, your battery is either only
partially charged, or is in bad condition (or both),
> Turn off all lights; the voltage should be back to 12.5 VDC.
> Now start the engine. You should see the voltage really take a dive while
cranking.
> As soon as the engine starts, and you release the key, the voltage should go
up to 13.5 VDC or so. In a healthy electrical system, this voltage will go back
down to 13 VDC or so within about minute.
> Now, watch the voltage as you turn on various electrical loads. The regulator
should sense the new loading and make the generator increase its output almost
instantly. And then, when you shut off a load, the regulator should not allow
the generator to"overshoot"; the voltage should stay substantially constant for
all motor speeds and electrical loads.
>
> If anything acts strangely during this test, it might mean a bad regulator,
generator, battery or wiring. The regulator voltage set-point can be adjusted,
but I would opt for a new one rather than trying to adjust spring tension and
contact positions in the regulator.
>
> Ed
> El Cajon
> 67 Rust Guppy
>
> [Non-text portions of this message have been removed]
>
>
> THE AMPHICAR-LOVERS LIST
> ~~~~~~~~~~~~~~~~~~~~~~~
> Before posting requests for information, please check the List
> Archives:
> http://www.escribe.com/automotive/amphicar/search.html
> For more information about this List and other available services
> visit:
> http://groups.yahoo.com/group/amphicar-lovers/
> To UNsubscribe from this List, just send a blank email to:
> amphicar-lovers-unsubscribe@yahoogroups.com
> Any other issues may be addressed to the List owner (Mike Israel) at:
> amphicar770@yahoo.com
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

--

Daniel and Kathy Gibson
http://www.katestrackshack.com
"Kate's Track Shack -Your Internet Home For Inexpensive 8-tracks!!"
AND...
http://drnooseandjambone.com
"DrNoose And Jambone - Do It To The Optigan!"
 
Thread starter Similar threads Forum Replies Date
A Generator question... General Amphicar Discussion 0
S Generator to Alternator: Which One? General Amphicar Discussion 15
G Generator Stuff General Amphicar Discussion 0
R Need help - How to flash my generator General Amphicar Discussion 0
W generator pully General Amphicar Discussion 0
D Generator Oiling General Amphicar Discussion 0
K generator test General Amphicar Discussion 1
K Generator/Regulator test General Amphicar Discussion 3
R alternator/generator General Amphicar Discussion 0
R Thoughts on Generator Reliability General Amphicar Discussion 1
R generator General Amphicar Discussion 9
R generator or alternator General Amphicar Discussion 3
D Autozone Starter And Generator General Amphicar Discussion 2
E Generator on eBay General Amphicar Discussion 0
K generator testing General Amphicar Discussion 5
T I NEED HELP - generator/regulator problems General Amphicar Discussion 5
M Polarizing a new generator General Amphicar Discussion 2
A Two Piece Metal Generator Fan/Pulley General Amphicar Discussion 0
A Generator Pulleys General Amphicar Discussion 0
D Alternator vs Generator General Amphicar Discussion 2
M Generator Pulley General Amphicar Discussion 0
M Re[2]: Generator Pulleys and Alternator co General Amphicar Discussion 0
M Generator Pulleys and Alternator conversions General Amphicar Discussion 2
M Generator Pulley Fun... General Amphicar Discussion 0
Jon March Fuel shutoff device - question General Amphicar Discussion 1
T Question on Gas Pedal General Amphicar Discussion 1
A Tool kit question General Amphicar Discussion 9
Jon March Disney cars question - General Amphicar Discussion 0
Jon March Dual-pump bilge outlet question General Amphicar Discussion 4
C Wheel cylinder Question. General Amphicar Discussion 9
Jon March radiator cowl question General Amphicar Discussion 0
okey0 Hauling Question General Amphicar Discussion 2
Jon March Axle tube bushings - a followup question... General Amphicar Discussion 0
Jon March Trivia question - General Amphicar Discussion 2
Jon March Question for anyone using Universal Tire American Classics "bias-look" radials General Amphicar Discussion 6
Jon March Transmission question - Gord? Dave? Others? General Amphicar Discussion 1
T Stuck valve AND valve cover question?? General Amphicar Discussion 5
Akamphi Neg ground question General Amphicar Discussion 2
A Question on body shop General Amphicar Discussion 0
BuckeyeFloater Quarters Question Restorations in progress 1
laserfixr Question for Gord General Amphicar Discussion 2
M Question on parts General Amphicar Discussion 1
Jacques B. Question about of the front lights. General Amphicar Discussion 2
Akamphi Prop light question General Amphicar Discussion 2
Midwest Amphicar Fiberglass hood and question General Amphicar Discussion 5
T License Plate Lamp Question??? General Amphicar Discussion 6
T Support Rod Question??? General Amphicar Discussion 7
Ed Price Exhaust Question General Amphicar Discussion 10
B Fuel Pump Question General Amphicar Discussion 2
T Window Fuzzies Installation Question? General Amphicar Discussion 1
Similar threads


















































Top