Columns and Blogs

One of the major impacts on motor life is common sense—or maybe the lack thereof!

There are several ways to control two identical, parallel pumps operating under variable frequency control in pumping applications.

This month we will quickly look at the load types that comprise a typical AC circuit.

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.

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

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.

I received many comments and suggestions on proper installation practices, following my article “Grouting: Pumps and Telephone Poles,” Pumps & Systems, July 2010).

When selecting a pump for variable speed operation, a number of conditions must be evaluated.

Using pump system analysis, from simple to the complex

Starting can have a significant effect on the life of the winding insulation of an AC motor.

Dr. Lev Nelik answers pump user questions.

Energy efficiency and reduced consumption are important issues in the pump and motor marketplace.

Efficiency degradation in pumps can be related to three areas.

The radial forces that form about the periphery of a single volute pump's impeller are proportional to total pump head, impeller diameter and vane width. They are seldom balanced, but they reach their lowest intensity between 80 and 100 percent of BEP flow.

When the motor amps are kicking a unit offline, the first question is whether the motor or the pump is the problem.

About 900 years before Newton formulated his universal gravitational theory, the Greek philosopher Aristotle espoused something different.

While scheduled downtime is different from unscheduled, both can take away from a company.

The frame sizes (physical dimensions) of AC motors have changed substantially through the years. Originally, they were considerably larger than those in use today. This increased size was the result of inefficiency and the need to dissipate heat.

Strengthening of bent shafts is a tricky and controversial process.

The frame sizes (physical dimensions) of AC motors have changed substantially through the years. Originally, they were considerably larger than those in use today. This increased size was the result of inefficiency and the need to dissipate heat.

Pages

Cahaba Media Group

See also:

Upstream Pumping Solutions

© Copyright Cahaba Media Group 2014. All Rights Reserved. Privacy Policy