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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

GE Dynamo Generator

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Old 10-16-2018, 08:52:54 AM
Matthew Guy Clarke Matthew Guy Clarke is offline
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Default GE Dynamo Generator

Can anyone difinately advise me how to hook this up or test it. Jon says one can hook a 12 volt battery to it turning it slowly ?
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Old 10-16-2018, 09:47:28 AM
Radiomike Radiomike is offline
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Default Re: GE Dynamo Generator

The first step would be to clean it all up and see if there is a data plate hidden some where. The next step is to check the wires for any markings, such as A (Armature) or F (field). There seems to be four wires in the terminal box. Trace these wires, check their continuity and make a sketch of the wiring. The two heavier wires probably go to the brushes, and maybe a connection to the four field coils. The two lighter wires are probably the shunt field windings. Make sure the brushes are clean and free to move in their holders.

Check that you have to ground faults in the armature or the field coils.

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Old 10-16-2018, 12:47:49 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: GE Dynamo Generator

Have a look at the brushes. Do they fit against the armature at an angle, or are they at right angles to the segments (straight away)? if angled, the armature should turn against the angle - that is toward the brush. if you motor the unit, and it turns against the brush, you need to reverse the polarity of the battery, so as not to damage the brushes.

You could try and motor the unit with a 12 volt battery to see if the armature is good, by attaching the armature wires to the battery. You would be advised to use a small battery first so if there is a problem, you don't fry the windings.

You could try belting it up temporarily to an electric motor, just to spin it up. Depending on how fast you can spin it, it may show you how much voltage it can make, depending on RPM. If no tag is on the unit, this probably is your best bet. Personally, unless other wise indicated, I would not turn faster than about 1200 RPM. Depending on how it's wound, your output could be anywhere from 24 to 130 VDC, again, depending on windings and RPM. Looks like a neat project, sure would make an interesting display! from the first look, I would suggest a 3 HP engine to turn it, if you want to make good power. if just turning for show, or very light load, maybe a 11/2 or 2 HP throttled engine would work well.

If this unit is a motor, you may find that it can turn at about 1750 - 1800 RPM. Have you tried to contact GE about this unit?
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Old 10-16-2018, 08:29:41 PM
Greg Mosley Greg Mosley is offline
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Default Re: GE Dynamo Generator

Greetings MGC, Couldn't make out what the tag said in your pix. Could you supply the data? Thanx.
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