December 16, 2020
Two-pole motors can be more challenging to repair because of the vibration issues that can be related to the units operating at higher speeds, which means there are special tests that need to be performed on them. Without checking characteristics such as runout and roundness, there is a chance that vibration won’t show up until …
April 18, 2020
Bearings account for about 51% of all electric motor failures and the most common sources of failure involve normal wear and tear, lubrication issues, contamination, or electrical damage that affects the bearing surfaces. While rolling element bearings are the most common type of bearing, sleeve bearings are found most often in larger motors that require a …
July 31, 2019
In the final post in this 8 part case study series, you will see Todd Hatfield explain the final assembly of the 5500HP, 13,200v, synchronous motor in the clip below from a presentation given at the 2018 RPM Symposium. The presentation below covers: Assembling the rotor to the adapter base with the stator Using the steel plate …
July 29, 2019
For part 7 of this series, Todd Hatfield will be explaining the process of creating the adapter base in the 2 videos below. Video one explains the engineering of the adapter base design, while the second video explains the process of mounting the stator to the adapter base. Video 1 describes: Creating a CAD drawing …
July 25, 2019
Below is a 2 minute clip of an hour long presentation given by Todd Hatfield during the 2018 RPM Symposium. Part 6 of this 8 part series focuses on the redesign and rewind of the stator for the 5500HP, 13,200v, synchronous motor. This video will describe: The new engineered stator winding design and CAD drawing Using …
July 23, 2019
In part 5 of this case study, Todd Hatfield will be reviewing the electrical design of the rotor. Below is a short 3 minute video showing the steps involved in creating the new coils for this 5500HP, 13,200v, Synchronous Motor’s Rotor. The video below will discuss: The decision to keep the coil design and duplicate it or …
July 17, 2019
Below is a 10 minute segment from an hour long presentation given by Todd Hatfield. In this clip, Todd Hatfield will go over the mechanical design of the shaft and rotor and how HECO assembled it all together. The presentation below discusses: Design assessment to see how to fit a larger shaft in the rotor …
July 15, 2019
In part 3 of this case study, Todd Hatfield will be discussing how HECO re-engineered the electrical and mechanical design of the surplus motor to match the 5500HP, 13,200v original motor. This 13 minute presentation will go over: On-site laser measurements using FARO technology Determining challenges such as How the spare motor would fit into …
July 11, 2019
For part two of the series, Todd Hatfield will be reviewing the dismantled surplus motor and explaining some of the on-site findings for the 5500HP , 13,200v, Synchronous Motor. In this video segment, you will see: The replacement motor’s shorting ring and it’s unique placement on the motor Data collected on the replacement motor’s stator and rotor …
July 9, 2019
The video below is a segment from an hour long presentation given by Todd Hatfield, Senior Electrical Engineer at HECO – All Systems Go, at the 2018 Reliability, Process, and Maintenance (RPM) Symposium. This is the first of an 8 part article series that will be coming out twice a week over a 4 week …
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