Motor Overheat...HELP!
Motor Overheat...HELP!
(OP)
Hi guys,
I'm troubleshooting an overheated single phase motor and I need some help here. The motor overheated and tripped at less than 1 hr. The capacitor is still in good condition, and the amp drawn by the motor is never higher than the rated current. I didn't see any fluctuation in voltage and current either. the motor just overheated and stopped.
Any advise as to how to figure out the problem?
I'm troubleshooting an overheated single phase motor and I need some help here. The motor overheated and tripped at less than 1 hr. The capacitor is still in good condition, and the amp drawn by the motor is never higher than the rated current. I didn't see any fluctuation in voltage and current either. the motor just overheated and stopped.
Any advise as to how to figure out the problem?





RE: Motor Overheat...HELP!
TTFN
THE KAT
RE: Motor Overheat...HELP!
An internal overload in a single phase motor is generally a thermal element of some type and these tend to degrade over time as the motor ages- particulary if the motor is run near or at full load. What enviroment is the motor in? A high ambient temperature can also cause this problem. A dirty motor doesn't help either. Check to see if you have proper air flow in the right direction. Some mechanical equipment, like recipricating compressors, have cooling fans on pulleys that aid in motor cooling.
If it is an external overload and all the voltage and curent readings r ok than check the setting of your overloads or replace the unit. Hope I helped.
RE: Motor Overheat...HELP!
RE: Motor Overheat...HELP!
What happened daskat?
RE: Motor Overheat...HELP!
RE: Motor Overheat...HELP!
TTFN
THE KAT
RE: Motor Overheat...HELP!
Thanks for reminding me about a stuck centrifugal switch. The motor would overheat for sure. But in practise - and I have witnessed it - the motor will generally overheat in less than a few minutes. I watched a motor catch fire and keep running because of this. The house wouldn't have lasted an hour let alone the motor.
RE: Motor Overheat...HELP!
The open shaft current would be high, but the motor will over heat without exceeding the nominal rating.
Best regards,
Mark Empson
http://www.lmphotonics.com
RE: Motor Overheat...HELP!