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Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

Delco armature love?


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  #1  
Old 10-24-2016, 08:06:20 PM
abowman89 abowman89 is offline
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Exclamation Delco armature love?

So.....the sum of all fears happened to me. I've been working toward getting a very co 8c3 running again and hit a substantial snag. The armature has continuity across all the plates to any other plate on the commutator. Does anyone have any words of wisdom on trying to repair it. I see no damage, rub marks, overheating, or damaged wires. I was thinking about baking it at 100 degrees for 10 hours to be good and sure it's dry in the middle but idk.
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Old 10-24-2016, 08:15:36 PM
Vanman Vanman is offline
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Default Re: Delco armature love?

There should be continuity between all commutator bars. In fact, there would have to be no less than two breaks in the windings for any two bars to not have continuity.

The next question is, do you read any continuity between the commutator and ground? That should read open circuit.

Keith
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Old 10-27-2016, 06:28:03 AM
abowman89 abowman89 is offline
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Default Re: Delco armature love?

From the commutator bars to any of the metal on the armature there is no continuity. So back up all the commutators bars have continuity to all of the other commutator bars? That don't seem right to me. Shouldn't one bar have continuity to just one bar 180 degrees away?
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Old 10-27-2016, 11:09:43 AM
Radiomike Radiomike is offline
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Default Re: Delco armature love?

As Vanman said the critical item is that the armature winding is free from any ground connection. This is easy to test, ideally with an insulation tester and for old equipment no more than 100 Volts.

Armature winding is a specialist subject but this is a link to basic principles.

http://www.electricaledition.com/201...c-machine.html

The resistance will be very low and is not easy to measure with a standard multi-meter. There is a forum posting for a low ohm-meter, if you are interested.

The condition of the commutator is important. The bars should be smooth and cleaned with scotch-brite or glass fibre brushes. When in use a patina will develop and this is needed. Do not use any silicone based solvents. The insulation between the bars, usually a mica based material, should not be proud and is usually slightly recessed.

Mike
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