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Archive: Category «Variable Speed Drives»

Industrial Automation

Applying Variable Speed Drives To Control Pressure

Using variable speed drives (VSDs) to control pressure reduces the electrical energy requirements by reducing the amount of hydraulic energy actually produced. A basic pressure control pump station is equipped… Read more

Oct 03, 2015 | By Edvard Csanyi

Applying Variable Speed Drives To Control Pressure
Electric Motor

Comparison of motor speed control methods

It is often desirable to control the motor speed, usually for reasons process control for such variables as flow or pressure. Such applications as fans and pumps often have varying… Read more

Mar 13, 2015 | By Edvard Csanyi

Comparison of motor speed control methods
Industrial Automation

Effects of Speed Variation on Rotodynamic Pumps

A rotodynamic pump is a dynamic device with the head generated by a rotating impeller. Thus, there is a relationship between impeller peripheral velocity and generated head. Peripheral velocity is… Read more

May 09, 2014 | By Edvard Csanyi

Industrial Automation

Benefits and Potential Drawbacks of VSDs

VSDs (Variable Speed Drives) offer several benefits, some of which are relatively easy to quantify, and others of which are less tangible, but there are some potential drawbacks, which must… Read more

Apr 03, 2013 | By Edvard Csanyi

Benefits and Potential Drawbacks of VSDs
Variable Speed Drives

VLT Drives in Wastewater Treatment Plant Applications

The most common use of frequency converters is to drive sludge pumps, elevators, conveyers, aeration, chemical dosing, clarifiers, digesters, presses and centrifugal dewatering. In the beginning water is being pumped… Read more

Nov 22, 2012 | By MarkoCvrkota

VLT Drives in Wastewater Treatment Plant Applications
Industrial Automation

Few Words About Frequency Converters

Since the late 1960’s, frequency converters have undergone extremely rapid changes, largely as a result of the development of microprocessor and semi-conductor technologies and their reduction in prices. However, the basic principles of… Read more

Nov 21, 2012 | By Edvard Csanyi

Few Words About Frequency Converters


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