In 2011, I wrote a five-part series on alternating current (AC) motors and motor efficiency. This column will go into more detail about the impact of efficiency.

Many engineers and technicians in the motor control industry consider a programmable logic controller (PLC) a necessary component for variable frequency drive (

Today’s industrial marketplace uses many different machines—such as pumps, fans, compressors and conveyors. One machine that is often overlooked is the centrifuge.

More than ever, commercial building owners and industrial process users need to reduce their maintenance costs and achieve energy savings.

You have probably noticed that three-phase motors can have a varying number of leads exiting the junction box. The most common numbers are three, six, nine or twelve.

According to the Department of Energy, motor-driven equipment—such as pumps, fans and compressors—consume about 16 percent of the energy used in U.S.

A series of studies by the Institute of Electrical and Electronics Engineers, Inc.

A variable frequency drive’s effect on system efficiency and motor life

End users must include bearing clearance as an integral part of designing or building a pump.

Learn how to avoid misinterpretations.

Last year, a Pumps & Systems reader asked about matching variable frequency drives (VFDs) and motors.

A simple mathematical model can be used to estimate vibration at the top of the motor in a vertical pump-motor structure.

In the food industry, stainless steel performs more productively and efficiently.

Equipment and technology improvements can be sound investments.

Understanding resonance is essential for solving problems of increased vibration.

The biggest decision is determining which tolerances to align.

Cost-effective solutions reduce harmonics and improve system reliability, efficiency.

The benefits of these motors provide the flexibility needed for challenging pump applications.