Latest Motors Articles

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.

Aligning an electric motor coupled to a large air blower required multiple measurements.

All electric motors (motors) have a housing that contains the working components of the motor.

Water and wastewater systems in the United States use a tremendous amount of power.

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.

Advanced motor protective relays provide superior protection for motors and pumps. pump system optimization

Last month, we ended with a discussion of the relationship between peak and RMS (or effective) voltage.

Following the development of variable frequency converter drives during the 1990s, totally enclosed fan-cooled (TEFC) AC induction motors became viable options for replacing DC motors in pumping applications.

With highly reliable electrical systems, protective relays may be called upon to operate very infrequently.

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.

A flexible coupling's primary functions are connecting two shafts, transmitting power from a driver shaft to a driven shaft and accommodating the misalignment between them.

Couplings are often forgotten until a project is nearing its end.

It has been said that Washington, D.C., is the home of the largest invertebrate population in the U.S.

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.

Bigger is better — or at least it used to be

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

The SI system is the modern day version of the metric system, and the U.S. gets a lot of grief for not embracing its inherent transportability across international boundaries.

A large wastewater processing plant experienced continual problems with its influent raw wastewater pumps for several years.

Energy is the largest ongoing cost of mixer operation, so it is vital to carefully consider the energy-to-thrust ratio (sometimes called the “water-to-wire” ratio) for each and every mixer application.

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Upstream Pumping

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