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Initial Test Runs On an Electric Motor Repair: What Does That Include?

12/21/2020

Everyone agrees that proper testing is vital, and initial test runs--when performed correctly--help electric motor repair technicians get a head start on troubleshooting electric motor problems. But what exactly do these initial test runs involve?

When Initial AC Motor Test Runs are Needed?

For most electric motor repair shops, an incoming test run is only performed for a few specific reasons such as if (1) the customer requests it (which is common), (2) if it is a 2-pole motor, or (3) if the motor has a particular problem that can be observed (e.g., vibration).  Beyond those situations, most shops only test run the electric motor, after repairs are completed, as a final quality assurance check of their repair.

Keep in mind there are many times when you cannot run a motor on arrival due to the condition of the unit. If the motor is grounded, shorted, locked up or has a bearing issue, it may not be safe to test it prior to repair. Think of driving a car after an accident - sometimes it can be safe and other times the vehicle must be fixed before it can be safely driven.

Why Initial Motor Test Runs are Important

Initial test runs give insight into the condition and performance of the motor before anything else takes place (e.g., cleaning, disassembly, repairs). The results of initial testing will better inform the troubleshooting process, which can shorten the lead time for getting your motor back. Which tests a motor fails and which tests it passes are key to narrowing down the cause of problems. 

Basics of AC Induction Electric Motors - Motor Components

12/01/2016

Todd A. Hatfield - Vice President of Engineering & Repair, HECO

This is the second article (video) in a series of articles on The Basics of AC Induction Motors. The first video explored the basic principles of AC Induction motors focusing on magnetism, electromagnetic induction, AC current, and rotating magnetic fields. This segment  discusses the different components that makes up an AC Induction Electric Motor: Rotor types and contruction, Stators and winding types, and bearing types. This was originally presented at the Reliability, Process, and Maintenance (RPM) Symposium on Sep 13-14, 2016.

Basics of AC Induction Electric Motors - Magnetism

11/14/2016

Todd A. Hatfield - Vice President of Engineering & Repair, HECO

This is the first article (video) in a series of articles on The Basics of AC Induction Motors. This video explores the basic principles of AC Induction motors. This segment discusses magnetism basics, the law of electromagnetic induction, AC current, and the explanation of the rotating magnetic field of an induction electric motor - getting to the basic parameters of how an AC induction electric motor works. This was originally presented at the Reliability, Process, and Maintenance (RPM) Symposiumon Sep 13-14, 2016.

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