I have a 115 10 amp dc motor

[618electrician]

I have a 115 10 amp dc motor i want to run on 120 ac volts ,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[Eddie702]

It would have to be a "universal motor" I think. I think these are usually small motors used in power tools etc.

 

[ActionDave]

I have a 115 10 amp dc motor i want to run on 120 ac volts ,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

That wouldn't be good for the motor!!!!!! Some more info would be helpful.

 

[ptonsparky]

Get a 120volt AC to DC controller. Very common.

 

[ptonsparky]

https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/dc_drives/high_voltage_(%3E_50v)_dc_drives/gsd6-240-15c

IDK how to make it shorter.

 

[kwired]

If it is 115 volt it may be a universal motor. I believe 90 or 180 volts would be more common for DC motors.

 

[ptonsparky]

If it is 115 volt it may be a universal motor. I believe 90 or 180 volts would be more common for DC motors.

That was the dividing point for the item I referenced.

 

[Joethemechanic]

If it's a brushes and commutator motor it will run, but most likely overheat if you load it. On 25hz like what the railroad uses on sections of the NE Corridor, from what I understand it will run pretty well.

The first scenario I tried. The 25hz thing I am going by what RR guys told me

 

[618electrician]

If it's a brushes and commutator motor it will run, but most likely overheat if you load it. On 25hz like what the railroad uses on sections of the NE Corridor, from what I understand it will run pretty well.

The first scenario I tried. The 25hz thing I am going by what RR guys told me

the motor is off of 855 greenlee smart bender ' i want to make it a non smart bender. the logic board is bad.

 

[Joethemechanic]

the motor is off of 855 greenlee smart bender ' i want to make it a non smart bender. the logic board is bad.

Is it a series field or a shunt field? All the universal motors I've dealt with have been series field. There is also the issue of excessive brush sparking when run on AC. You might have to adjust the brush position to minimize sparking and for the motor to produce it's maximum HP. Some motors have adjustable brush holders to allow you to set the "timing" for lack of a better term. There are also differences in the way the field is wound if I remember correctly, but exactly what the difference is I don't remember. All I can tell you is that yes it will start and run on AC, but how long of a run until it overheats I don't know.

Is there some reason you can't build a DC power supply for it?

 

[hbiss]

the logic board is bad.

Seems to me that it already has a power supply, that should be working.

-Hal

 

[garbo]

Two ways of identifying Universal motors: Speed is at least three times higher then a two pole motor. On 60 hertz a two pole motor is around 3550 RPM while a universal often run st 10,000RPM, and if you were to disassemble an old hand drill that name plate states it can run on AC or DC if you follow the current path one of the line wires feeds a motor winding then connects to one of the armature brush holders then out of the other brush holders to the other motor winding then to other side of power. My dad had a 3/8" hand drill made in the 1950's that was rated to run from 115 volts AC or DC.Never came across a universal motor larger then think 1/4HP..

 

[tortuga]

the motor is off of 855 greenlee smart bender ' i want to make it a non smart bender. the logic board is bad.

I doubt thats a universal motor.
Rectified DC is 1.414 X the RMS AC voltage so to get 115 DC I'd look for a transformer with a ~83 - 85V volt secondary, then a full bridge rectifier rated about 2-3X the motor FLA to get pulsed DC then filter caps to smooth it out to about 117 - 120 DC allowing for a few volts drop.