Question About online preventive maintenance of Induction motors
Question About online preventive maintenance of Induction motors
(OP)
Hi All
I would like to know , whether we need to have maintenance in a preventive way , if the induction motor that usually works in a constant speed , 400 V , 40 A ? when it has an inverter that also (I am not fully informed in this area so if you let me know what are the objectives of the inverter) , so in this case the electric motor has a complete control panel , does it still need a preventive maintenance , one idea is that since the number of failuares are not so high , for example it's more probable that the motor gets an electric failure and following problems for bearing and vibrations and stop , for example if the inverter fails, which , without instruments , it is hard to understand if the problem is from the inverter or the motor
yet it is less probable that the problem arises from the mechanical part, I mean the bearing breaks itself
so is a maintenance necessary ?
Thank you
I would like to know , whether we need to have maintenance in a preventive way , if the induction motor that usually works in a constant speed , 400 V , 40 A ? when it has an inverter that also (I am not fully informed in this area so if you let me know what are the objectives of the inverter) , so in this case the electric motor has a complete control panel , does it still need a preventive maintenance , one idea is that since the number of failuares are not so high , for example it's more probable that the motor gets an electric failure and following problems for bearing and vibrations and stop , for example if the inverter fails, which , without instruments , it is hard to understand if the problem is from the inverter or the motor
yet it is less probable that the problem arises from the mechanical part, I mean the bearing breaks itself
so is a maintenance necessary ?
Thank you





RE: Question About online preventive maintenance of Induction motors
My suggestion would be to start with an expert in the specific inverter drive you have now, if someone is avaiable to you, who can instruct you on ways to mitigate and avoid these problems. If there is no one available in your area, look for a local Electrical Engineer with specific experience in Inverter Drive installations. You have issues that have solutions, the details of which are complex and are best served by someone who can observe them on site.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Question About online preventive maintenance of Induction motors
RE: Question About online preventive maintenance of Induction motors
Some more food for thought:
The bearings may need to be greased periodically (depending on size/speed/enclosure).
Don't know if it's an ODP motor with filters… those would require maintenance.
Periodic visual inspection may be a good idea. Especially if there are people available to easily monitor it and environmental factors (outdoor) that may hasten a variety of degradation mechanisms - corrosion, dirt, rodents etc.
Monitoring of vibration pays dividends in some applications. Depends in part on how easy it is to monitor and what is the cost of failure.
Large critical ODP motor outdoor probably needs to be disassembled for cleaning/inspection every 10 or 20 years. Other monitoring strategies may play a role here also.
There might be more to say. But would be better for you to give us an idea of machine size, speed, bearing configuration (open, shielded, sealed), environment (humidity, other factors), is there a a skilled operating / maintenance / predictive staff available and how far, are the people around that would hear the machine if noise starts changing (you might take some credit for that), what is the consequences of failure etc. And of course tell us more about this inverter, it's purpose and environment.
All of these will play a role in any recommendation / decision and ultimately will still be somewhat subjective.
=====================================
(2B)+(2B)' ?
RE: Question About online preventive maintenance of Induction motors
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington