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Bearing Protection of Inverter-duty Motors

Although it is now common knowledge that inverters—also known as variable frequency drives—often induce unwanted motor shaft voltages, many customers who purchase three-phase alternating current (AC) induction motors do not realize that models labeled “inverter-duty” or “inverter-ready”...

Reviewing Electric Motor Reliability Research

What did the studies really say—then and now? BY HOWARD PENROSE, Ph.D., CMRP One of the most frequently quoted studies related to electric motor reliability is a 1983 Electric Power Research Institute (EPRI) project, entitled “Assessment of the Reliability of Motors in Utility Applications:...

Understanding Short Circuit Motor Contribution

A back to basics approach BY DARRELL BROUSSARD, GE Industrial Solutions An electric motor’s contribution is the current generated by a motor or motors during a short circuit condition. It represents a small but important value that is needed to determine the maximum short circuit current...

Variable Frequency Drive Cable Best Practices

Correcting common mistakes that affect performance and safety BY PETER COX, Belden, Inc. Most industrial operations today are looking for ways to reduce costs in these tough economic times. Variable-frequency drives (VFDs) are popular in many applications because they provide energy savings and a...

Overload Protection for Electric Motors

Thermal images are an easy way to identify apparent temperature differences in industrial three-phase electrical circuits, compared to their normal operating conditions. By inspecting the thermal differences of all three phases side-by-side, technicians can quickly spot performance anomalies on...

Enhance Performance with VFD Technology

Energy savings for pumping applications BY TOM NEUBERGER & STEVEN WESTON, Eaton In the early days of variable frequency drive (VFD) technology, the typical application was in process control for manufacturing synthetic fiber, steel bars and aluminum foil. Because VFD improved process...
Home Motors & Drives

Motors & Drives

Improving Motor Maintenance Practices

Useful approaches to building an effective operation and maintenance program

BY IAN CULBERT AND VICKI WARREN, Iris Power Engineering

The pressures to be more competitive and cost-effective in today’s deregulated market have driven plants to reduce resources by making more informed, condition-based decisions regarding equipment maintenance activities. These decisions go beyond the traditional technical specifications and acceptance criteria that were used when plants where designed and manufactured.

Motor maintenance programs must balance safety and economic...

Motors & Drives Articles

T&D Buyer’s Guide Companies

Motors & Drives Videos

The Sediver Research Center English Version

DDIN Grounded Helicopter Stringing Block

Vibro-Acoustic Testing applied to Circuit Breakers (On-line/Off-line)

Motors & Drives Products

BirdBloc

AMPERETM

Calisto R9 - High-accuracy and Low-maintenance Dissolved Gas Analysis (DGA) Monitor

Motors & Drives Shared Media

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Power Quality, Grounding & UPS Handbook Vol. 8

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Contact Material Recycling and Sustainability in Electronics

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Electricity Today T&D Magazine - Electrical Substations Special Issue