Mechanical Services
Gearboxes, Pumps, Blowers & Fans, Extruders, Grinders, Choppers, Shredders, & More
On-Site Field Services
Certified Vibration Analysis, Laser Alignment, Dynamic Balancing, PDMA, Installations & More
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Here is an interesting picture from our shop today. This motor was found to have a defect via vibration analysis. The vibration analysis indicated that there was a fault occurring from inside the machine. When disassembled one of the magnetic wedges had broken loose and was rubbing the rotor. This rewind was less than 2 years old, so what happened?
The magnetic wedge that was used was not correct for this 2300V, 400HP electric motor. The shape, length and metallurgical composition of the wedge didn’t match the factory specification. As a result, the wedges were able to vibrate in the slot allowing the wedges to deteriorate prematurely. There are other contributors as well, but ancillary contributors.
When you rewind an AC motor with form coils, a key component is making sure that the wedge shape, wedge material, wedge length and slot fill are correct for the machine for reliability purposes. Of course there are many other things to consider as well. As seen in the attached picture there are many variations of wedge shapes. We partner with our suppliers and OEMs to ensure that we are using the proper materials and/or finding ways to enhance the original design.
When you partner with EEMSCO, INC. you have a team at your disposal who can help ensure your assets have the proper materials to meet your application requirements and meet the ANSI/EASA AR100-2020 recommended practice for the repair of rotating electrical apparatus.
We’ve been around for over 100 years and look forward to serving our customers with excellence for years to come.
#reliability #ACmotors #rewind #EASA #EEMSCO #TrustedPartner #VibrationAnalysis
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You can’t test in quality, but you can ensure quality with the proper tests. In the video below we are using Electrom Instruments Inc iTIG IV and individually surge testing each coil before connection.
These coils are submersible rated and carry the IEEE 522 3.5 p.u. rating. This 2300V motor will be ready for its challenge in harsh environments.
You can rest assured when you partner with EEMSCO, INC. that we will work together to ensure your motor is correct inside and out for the environment/application it’s in.
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Finishing up pre-VPI testing on this 900HP, 14 pole, 2300V motor for a valued customer of EEMSCO, INC. We trust Electrom Instruments Inc 12kV iTIG IV to perform our component testing in our rewinds. We also use this tester to determine if machines have evidence of PD especially in low voltage VFD applications to find potential faults before they occur.
Great job team! Want to know more, ask below or give us a call!
#easa #eemsco #reliability #acmotor #motorrepair #trustedpartner
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A couple of neat old pictures of coal mine motor generator sets in our shop many years ago. Belonging to West Kentucky Coal of Sturgis, KY. No date on these pictures but if I had to guess I’d say 1930s?? We were founded in 1920 and are 104 years old! Any expert guesses on possible years??
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Here is a 900HP, 900RPM definite purpose ABB motor that was brought into EEMSCO, INC. Our team provided a complete solution. We removed the motor from service, reconditioned the motor, fabricated a mounting bracket for an Avtron™ Encoders AV850 for mill duty environments and we will reinstall it next week. It is great to see the pride our staff has in serving their customers with excellence. We stand on the pillars of being customer centric for internal and external customers.
#trustedpartner #easa #ACMotorrepair #engineering #reliability #CustomerFocus
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A local customer had EEMSCO, INC. on site to look at a gear box as it had vibration issues. Our analysts also found that the 300HP motor had mechanical looseness on the ODE. We brought the motor back assessed the motor’s condition, fixed the housing, installed new SKF bearings, shaft grounding and rebuilt the Inpro seals. The motor will be returned ahead of schedule. Great job team!
#EEMSCO #EASA #ACmotor #motorrepair #trustedpartner #reliability
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