Evaluating Winding Connections With Infrared

{Caption: Motor winding during heating- Image Courtesy of Dr. Penrose's article on Reliabilityweb.com}

An article on a unique Infrared thermography application by Howard Penrose of Success by Design published on the Reliabilityweb.com website.

It describes rewinding of an electric motor and the internal connections of the winding.

Improper brazing, crimping or other methods of making the connections will generate a hot-spot due to resistive losses caused by high resistance electrical connections, known as I²R (In this case, I=Current in amperes and R=Resistance in ohms).

To quote the key point in the article:

Hot spots in the windings or connections can be investigated and repaired prior to varnishing, reducing potential warranty issues. The time to perform the test is negligible as the power testing is normally performed as part of a rewind quality control step.

You can view the report without any registration requirement by clicking on the link: reliabilityweb.com/index.php/articles/evaluating_winding_connections_with_infrared/

SUCCESS by DESIGN® is an award winning reliability and consulting firm.

Howard W Penrose, Ph.D., CMRP, is the President of SUCCESS by DESIGN, a reliability and maintenance services consultant and publisher, and the Founding Executive Director of the Institute of Electrical Motor Diagnostics, Inc. He has over 20 years in the energy, reliability and maintenance industries with experience from the shop floor to academia and manufacturing to military.

Reliabilityweb.com is a information and research firm publishing practical information for maintenance and reliability professionals. They also publish many special articles on Infrared Thermography on a website page labeled “Infrared Resources & Links”, just click to retrieve.