View All What are variable frequency drives? What are AC motors?

Motors, Drives May 17, 2020

10 essential maintenance and troubleshooting tips for VFDs

A properly maintained variable frequency drive (VFD) can provide decades and cost-effective service. Making VFD inspections and maintenance part of facility oversight can improve outcomes.

By Lori Wade
Motors, Drives April 10, 2020

High-performance motor designs

Motor innovations: Advanced motor technologies influence motor form factors, performance, and efficiencies. Examine how these technology advances can help with your next set of applications.

By Dan Jones and Mark T. Hoske
Motors, Drives September 6, 2019

2019 Motor Drives Study research

Five trends on buying and, specifying motor drives for industrial automation applications.

By Amanda Pelliccione
Motors, Drives August 16, 2019

Motors, fans, pumps, compressors: IIoT avoids downtime

Think Again: Remote monitoring, sensors, analytics and real-time intelligence is helping those who manufacture, use, and repair motors and attached critical assets to avoid downtime with prescriptive maintenance technologies, says EASA and Plant Engineering research.

By Mark T. Hoske
Motors, Drives January 30, 2019

Diagnosing motor health: Start with the basics

Temperature, power quality, and torque all are strong indicators of a motor's health.

By Frank Healy
Motors, Drives July 31, 2018

Six common reasons why electric motors fail

A number of reasons can cause an electric motor to fail. Six reasons are discussed.

By Avi Patel, EzyTrader
System Integration June 5, 2017

The ABCs of VFDs

Find the right application to match the motor need and know the conditions for using a variable frequency drive (VFD).

By Kevin Goodsell, Valin Corporation
Motors, Drives March 7, 2017

Understanding ac induction motor basics

Knowing how magnetism and electromagnetic induction work are crucial to understanding how an ac induction motor works and functions.

By David Manney, L&S Electric
Motors, Drives January 13, 2017

How does motor current analysis help motors?

Motor current analysis provides information on existing issues such as loose connections, burned windings, and grounded windings.

By David Manney, L&S Electric
Motors, Drives January 12, 2017

Importance of motor winding analysis in a facility

Motor faults and failure can cause disruptions to business operations and lead to loss of productivity and reduced profits.

By David Manney, L&S Electric
Motors, Drives December 13, 2016

Why online motor testing is a great PdM tool

Although offline or static testing is an important part of a routine maintenance program, dynamic testing of motors can be done more frequently and, in many cases, with greater benefit.

By David Manney, L&S Electric
System Integration December 5, 2016

VFD efficiency: Three best practices

The use of variable frequency drives (VFDs) has many benefits including improved process control, energy savings, higher reliability and reduced wear and tear.

By Gary Jacott, Motion Industries
System Integration December 2, 2016

Considerations for using VFDs with standard motors

End users desire speed and/or torque control procure and install VFDs to modify existing applications where a standard-induction motor is in place. There are a few areas of concern involving misapplication of a standard induction motor.

By Mike Howell, EASA Technical Support Specialist
System Integration October 19, 2016

VFDs offer cost-effective benefits for plants

Variable frequency drives (VFDs) are designed to reduce energy usage by controlling the speed of the motor and can offer cost-effective benefits for plants.

By David Manney, L&S Electric
System Integration October 7, 2016

Prevent shaft current from causing motor damage

Awareness and testing for potential shaft current on motors can help companies experience fewer problems with downtime and equipment failure.

By David Manney, L&S Electric
System Integration October 2, 2015

Using medium-voltage VFDs for better pump process control

How product innovations are revolutionizing pump monitoring and process control management.

By Rob Lax
System Integration June 4, 2015

VFD trends and solutions for drive systems

Harmonics mitigation, filtering voltage spikes are two key issues.

By Alex Ward, REO-USA
Motors, Drives March 4, 2015

A systematic approach to ac motor repair

ANSI/EASA AR100 provides best practices for mechanical repair, electrical repair including rewinding, and testing that help apparatus rebuilders maintain or enhance the performance, reliability, and energy efficiency of ac and dc motors and generators.

By Tom Bishop, PE, Electrical Apparatus Service Association
Motors, Drives October 22, 2013

Motor base support and alignment

A basic understanding of frame construction can help minimize motor vibration.

By Chuck Young
Motors, Drives November 10, 2012

Avoid over-specifying inverter-duty motors

When combining a motor and inverter, the application should tell you what type of motor fits best. If you follow these guidelines, you can avoid more than is necessary.

By John Malinowski
Motors, Drives September 24, 2012

Permanent magnet motors outperform induction motors in many applications

Permanent magnet synchronous motors offer significant advantages on high-energy-consuming and high-dynamic applications, compared to induction motors. See table, photo gallery.

By Harald Poesch
Motors, Drives April 1, 2006

Thinking inside the box: Energy costs drive ac-drive innovations

The types of ac drives used with ac induction motors are V/Hz, encoderless and flux vector. While there are many drives available for synchronous and servo motors, induction motors have the majority of applications. Sensorless vector control is the same as encoderless vector control, which better describes its operation.

By Jack Smith, Senior Editor
Power Systems June 10, 2004

Basics of power management software

Powerful analytical tools — software, PCs, networks, and the internet — are within a click of the mouse. Power monitoring equipment captures data; software analyzes critical data required for responsible electrical energy management. Power management software tools provide control over how you manage your use of electricity.

By Jack Smith, Senior Editor, Plant Engineering magazine
Electrical October 10, 2003

Basics of how to minimize harmonics

The August 14, 2003 blackout emphasized that power quality should not be taken lightly. The blackout was caused by, and affected the power grid — our nation's electrical infrastructure. The issues raised by this event should and will come under scrutiny. Just as the nation looks at its power quality issues, plant engineers must look at power quality issues inside the plant.

By Jack Smith, Senior Editor, Plant Engineering Magazine
Motors, Drives March 1, 2001

Choosing between IEC and NEMA motor controls

Key Concepts NEMA and IEC motor controls differ in size, ruggedness, and complexity. The solid-state overload relay is common to both NEMA and IEC motor controls.

By Jack Smith, Senior Editor, Magazine