Owing partly to tradition, the shafts of electric motors are often larger than those of the equipment they drive.

Last September, we spoke about the importance of pipe-to-piping alignment, evaluating actual numbers, and tabulating stress values as they approach yield stress of pipe at various values of misalignment. This time, we will discuss the effects of pump-to-motor misalignment, beyond hype or generalities, by numerically quantifying the conclusions.

The industrial motor world has a new specification available for defining the requirements of general purpose, severe duty motors in the 250- to 3,000-hp range.

Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability.

For the first time, the United States Department of Energy (DOE) adopted energy conservation standards for small electric motors in February 2010.

Mechanical resonance occurs when an external source amplifies the vibration level of a mass or structure at its natural frequency.

It is impossible to balance line-to-line voltages perfectly in a three-phase circuit.

Bigger is better — or at least it used to be

After spending money on a powerful new pump and the motor to run it, the next big decision is how to connect the two in a way that maximizes their efficiencies and protects them from normal wear and tear.

Significant energy and money savings are realized when using variable speed motors controlled with drives.

This three part primer is a basic introduction to AC power for those in the pump industry who need a place to start. It will also provide several web references to access if you would like to further your understanding of this interesting and essential topic.

Introduced in June 2010, Super-E Motors with AEGIS Shaft Grounding Ring are used in commercial and industrial applications.

Named for a technique commonly used on failing pumps, "percussion maintenance" - where a technician beats on the pump's stalled motor with a hammer or rubber mallet - often indicates motor deficiencies in his diaphragm pump.

The industrial motor world has a new specification available for defining the requirements of general purpose, severe duty motors in the 250- to 3,000-hp range.

As a follow up on my AC Motors series, I thought it would be a good idea to provide a short overview of work, power and torque as it applies to the AC motor.

Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability.

Although a number of AC motor designs are used, the induction motor is, by far, the most common and will be the topic of this column.

Because operational costs ride on efficiency determinations, accurate measurements of losses occurring within the motor are paramount. The reliability of efficiency data is key to any energy-savings plan, and knowing the meaning behind the rating can make or break a smart purchasing decision.

Data-driven visibility helps protect industrial processes and motors.

Pages