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.

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.

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

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.

Bigger is better — or at least it used to be

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

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.

The frame sizes (physical dimensions) of AC motors have changed substantially through the years. Originally, they were considerably larger than those in use today.

Last month, we studied the properties and effects of resistive, inductive and capacitive loads in an AC circuit.

Due to the expense and labor required, most facilities need to maximize the life of their motors.

Most of us probably never notice the spinning cylinder mounted between the pump and motor, except how easy it is to dis/assemble when a pump or motor is changed out.

All electric motors (motors) have a housing that contains the working components of the motor. In the U.S., the enclosure describes this housing.

Data-driven visibility helps protect industrial processes and motors.

The pump industry is the largest purchaser of electric motors in the United States.

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