How to add additional cooling to motor
How to add additional cooling to motor
(OP)
The hoist motor on a monorail crane occaisonally overheats during heavy use in hot weather. We have no easy way to cool the building or upgrade the motor.
I'm hoping to find a simple way to provide additional cooling to the motor. We will attempt to add fan to circulate more air around the motor, but I am not optimistic this will help.
We have some power available but not a lot of room. We have no way to get compressed air or water to the motor since it is on a crane trolley.
I'm hoping to find a simple way to provide additional cooling to the motor. We will attempt to add fan to circulate more air around the motor, but I am not optimistic this will help.
We have some power available but not a lot of room. We have no way to get compressed air or water to the motor since it is on a crane trolley.





RE: How to add additional cooling to motor
90% of electric motor failure is due improper lubrication. If dirt gets inside the windings it will cause hot spots and make the motor over heat. This may be more of an issue if the ambient is high. Taking the motor apart and cleaning it may help.
RE: How to add additional cooling to motor
It happens when there are a lot of start/stops and heavy usage in warm weather. Hoping to knock temeprature down a little so we don't hit the trip point.
RE: How to add additional cooling to motor
Mike Halloran
Pembroke Pines, FL, USA
RE: How to add additional cooling to motor
TEFC makes little sense for a crane because the fan is not on when the motor is not on.
RE: How to add additional cooling to motor
I am with MJ on this, it sound like your motor isn't rated properly.
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RE: How to add additional cooling to motor
The duty cycle of the crane was not specified correctly and we are using it at or slightly beyond its rated duty cycle.
We are trying to figure out how to mount fan. There is not much room. I think that is the best solution though.
RE: How to add additional cooling to motor
TTFN
RE: How to add additional cooling to motor
RE: How to add additional cooling to motor
Buy fan and motor.
Figure out where and how to mount.
Fabricate mounting.
Run power.
Figure out how to control power.
Buy starter, control relays and enclosure.
Figure out where and how to install starter, control relays and enclosure.
Run wiring to fan.
To install a properly rated motor:
Buy proper motor.
Install.
RE: How to add additional cooling to motor
Like I said above we are using it more than the rated duty cycle and the building is probably a lot warmer than it was designed for, just enough that we are tripping the motor on overheat. This is not a new problem, just an annoying intermittent problem when using the crane a lot when weather is hot.
Sounds like the answer is a fan, which is normally an easy fix (as MintJulep indicated) but we don't have much space and environment is dirty. Other fans in that area tend to quickly get caked with dust. Of course a properly rated motor would also work but was hoping not to spend that kind of $.
Was hoping for some alternative easy fix. I guess if there was one I would have known about it.
Thanks
RE: How to add additional cooling to motor
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Rust never sleeps
Neither should your protection
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RE: How to add additional cooling to motor
http://www.peinfo.com/
Mike Halloran
Pembroke Pines, FL, USA
RE: How to add additional cooling to motor