Active Front End (AFE) drives use two power sections. An active rectifier is used to minimize the amount of harmonic distortion reflected to the power grid by drawing nearly sinusoidal current from...
Drives Enhance Energy Efficiency in Wastewater Aeration
Variable frequency drives improve treatment plant’s blower operation.
Drives to Reduce Harmonics
Cost-effective solutions reduce harmonics and improve system reliability, efficiency. Energy efficiency requirements, regulatory compliance, increasing energy costs and improving system and...
In the U.S. industrial sector, motor-driven systems consume 70 percent of all electricity. Motor-driven pumps account for more than 30 percent of that amount-more than any other application....
Pumps & Systems, April 2008 As oil prices and gasoline usage have increased, the demands on U.S. oil and gas wells have grown dramatically. In the past, there was a low cost supply from the...
New Advances in Variable Frequency Drives
Variable frequency drive technology is more efficient and accurate, which leads to increased energy savings. Advancements in capacitors and direct current (DC) link reactors, IGBTs, heat management,...
Pumps & Systems, June 2008While driving a car with the gas pedal to the floor and then controlling your speed using the brake is obviously inefficient, many facilities use the approach for pump...
Engineering got underway for the modern Cresson Mine, located between Cripple Creek and Victor, Colo., in 1993. (The historic underground mining operation for the Cresson Mine was first developed in...
Pumps & Systems, April 2008 Production, distribution and refining applications in the oil and gas industry rely heavily on motor-driven pumps and pumping systems. Keeping electric motors driving...
Variable Frequency Parallel Pump Analyzer
There are several ways to control two identical, parallel pumps operating under variable frequency control in pumping applications. One method is to size a single drive to handle both pumps and vary...
Editor's Note: This is part one of a three part series about variable speed pump selection. To read the next article in the series, click here.When it comes to pressure and flow, variable speed...
Pumps & Systems, January 2009 Editor's Note: This is part three of a three part series about variable speed pump selection. To read the previous article, click here. Last month we reviewed...