Electric Motors • Perfomance Systems
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:
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 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 period. Each post will cover different points of the case, leading up to the final assembly and installation. Be sure to check out this article on how Synchronous Motors work before starting the series!
Below is a 5 minute video from an hour long presentation given by Todd Hatfield, Senior Electrical Engineer at HECO - All Systems Go, during the 2018 Reliability, Process, and Maintenance (RPM) Symposium. This clip covers the basis of synchronous motors and how they differ from induction motors.
There appears to be a trend happening in industry that needs to be looked at in greater detail and I hope to shed some light on this subject.
We are all so quick to repair the motor, pump, gearbox, or fan when a failure occurs; however, we hardly ever spend time looking at what the equipment is attached to…the base.
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Do you know what motor you should use when operating in a harsh, heavy or severe duty environment? At minimum, you should be using a Total Enclosed Fan Cooled (TEFC) Severe Duty (SD) motor. But, where do you turn when a standard severe duty motor just isn’t enough? One option worth exploring is an IEEE-841 motor.
There are a few of us “old timers” left around who can remember our first analyzer. It was free, and we thought we could solve anything. It was our very own brain. With the touch of the hand, chunk of broomstick, or long screwdriver, by listening we could solve any issue and predict an impending failure. For the most part, this system worked pretty well and to this day, listening and feeling plays a very integral role in PdM (Predictive Maintenance). The biggest downfall of this method is that same ear and same touch can’t always be there and can’t log or trend what you are feeling and hearing, nor could we actually measure that feel to determine and trend precise changes.
It is standard to see the “frame” size on every electric motor nameplate, but do you understand what that frame means in regard to the mounting of the motor? Many have been in the situation where you needed a specific frame only to realize it was made with a special shaft or has a mounting flange, but no one knew how to find this information!
When you think about the processes you have in place at your facility that are designed to keep the operation running, the first thing that comes to mind is most likely the PM schedule. You go around monthly or so and check filters, oil levels, temperatures and other detectable signs of easy to remedy issues that are bound to arise. Beyond that, maybe you have a quarterly vibration route and are collecting data on the health of your machines. Usually, this data is worth the cost of the program when it is able to predict an impending failure that can then be repaired before it breaks down catastrophically. This is a solid cost savings and can be easily justified.
If you are involved in the repair of electric motors, chances are you have heard about a core loss test (or core test, core loop test, core flux test, etc.) being performed on your motor. This article serves to provide a basic understanding of what a core loss test is and why it matters.
