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 …
September 27, 2018
Time is money. When an electric motor is out for repair it can take days, weeks, or months to get it back. What should your expectation be? What are they even doing with the motor while its gone, why does it take this long? We feel a better question to ask is: Does a quick …
April 11, 2017
When an electric motor fails, a plant must make decisions in a timely manner, but the decisions made can have a major impact to reliability in the long run. Should you repair the current electric motor or replace it with a new one? This presentation covers some direction to making a plan in order to …
February 27, 2017
This is an electric motor repair case study on a 800HP, 900RPM, 4000V Coal Crusher Motor for a Midwest-US based coal fired power generation plant. In 2006 the utility came to HECO after years of repetitive failures circling around the electric motor’s rotor. This was originally presented at the Reliability, Process, and Maintenance (RPM) Symposium on Sep 13-14, …
November 1, 2016
Before reading this article – be sure to first read the first and second articles in this case study series. The results of the “on-site” findings in conjunction with the “in-shop” inspection led to the electric motor repair approval to build a new rotor assembly for this Boiler Feed Pump Motor (9000HP, 1800RPM, 13,200v, Siemens …
Subscribe to our blog and get tips and updates to optimize your electric motor powertrain.