[DIYguy]

Wondering about the terminals on this...and if anyone knows the brand...

I'm pretty sure it came out of a Caterpiller lift truck. Looks in very good shape on inside.... bit dirty on outside....

As for the terminals.... my first thought was connection to field windings for series/parallel switching??....but.... I thought 4 terminals were required for this?? One is labelled BWI, another F1 - E1 (the"F1" has box around it), the other is F2 - E2 (F2 has a box around it).

The pigtail is likely thermal switch connection.... yes?

Does the symbol on the tag look familiar to anyone?

This thing will likely handle gobs of current with the big bars... 37 segment comm... but maybe not so high voltage? No interpoles.. would love to fit some though.

I'm thinking to put this in my truck, direct drive.

[DIYguy]

Here's a few more shots...

Double brushes, hardly worn. Double pig tails/brush. Nice film on the com and no visible wear. Pretty clean on inside. Has kevlar banding. 10 tooth spline.

[jackbauer]

Looks like you may have a compound wound motor. Like me. BWI is "brush wear indicator". F1 and F2 are the shunt field terminals. Put a multimeter on there and measure the dc resistance. Mine is 18 ohms.

[Yabert]

Great found!!!

How and where do you find all this motors?

[DIYguy]

Originally Posted by Yabert

Great found!!!

How and where do you find all this motors?

Is it? I'm not sure yet..lol I didn't pay much for it.... but still... I thought it was a series motor....

[DIYguy]

Objective is to run this motor on a series DC motor control. Soliton1.

OK so, I'm trying to wrap my brain around the compound wound DC motor. I don't see any reason it couldn't be just used as a series motor without exciting the shunt field. It has a series winding anyways. Should work as a series motor. Yes? In this configuration, would it have less torque than a pure series motor due to the space taken on the field coils by the shunt windings? (I have no specs to compare it to other 13 inch series motors)

Second thought... (don't laugh) ... Is there any reason that the shunt winding cannot be connected in parallel with the series field winding?
If I connected F1 to S1 and F2 to S2...linked A2 to S1/F1 and put line on A1 and F2/S2 would this give me a motor that performed most like a regular series motor... or would I burn out the shunt winding?.... No, I don't know if it is short or long shunt connected...... yet...

Thanks for any comments....

I could post a sketch if it would help....??

[DIYguy]

Originally Posted by jackbauer

Looks like you may have a compound wound motor. Like me. BWI is "brush wear indicator". F1 and F2 are the shunt field terminals. Put a multimeter on there and measure the dc resistance. Mine is 18 ohms.

Thank you Jack. It never even occurred to me that it was a compound wound motor...lol. I did remember what the BWI represented...after I asked...

Now what? I have to learn about these motors. Can it be run purely as a Series motor on a regular controller?? If so, what am I giving up? If not, do I have to control the field like a sepex?