Electric Motor
Comparison of 4 Different Flow Control Methods Of Pumps
When in use, the pumps are always part of a pumping system. A pumping system is usually a network of pipes, tanks, valves and other system parts. The receiver is usually at a higher geographic level than the supply of… Read more
Nov 27, 2015 | By Edvard Csanyi
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 with one pump controlled by one variable speed drive (VSD)…. Read more
Oct 03, 2015 | By Edvard Csanyi
Industrial Automation
Selection of a suitable softstarter for application with conveyor belts
Conveyor belts can have a lot of different looks and directions of use. It is a typical constant torque load with low to high braking torque depending on how heavy it is loaded. Let’s take a look at the most… Read more
Sep 07, 2015 | By Edvard Csanyi
Industrial Automation
Few Good Tips For Estimating and Optimizing Pumping Energy Costs
To help estimate pumping energy costs: To compare different system and pumping equipment proposals and make an intelligent choice, three facts will need to be established: Will the process require varying flow rate, and, if so, must it be continuously variable… Read more
Aug 28, 2015 | By Edvard Csanyi
Electric Motor
Comparison of Soft Starting and Frequency Converter Motor Starting
A soft starter is, as you would expect, a device which ensures a soft starting of a motor. A softstarter has different characteristics to the other starting methods. It has thyristors in the main circuit, and the motor voltage is… Read more
Aug 12, 2015 | By Edvard Csanyi
Testing and Commissioning
What to check when commissioning variable speed drives
The main purpose of commissioning VSDs is to ensure that: The AC converter and motor have been correctly installed and meet the wiring and safety standards such as IEC 60364 or Australian standard AS 3000. The power and motor cables… Read more
Apr 22, 2015 | By Edvard Csanyi
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 output requirements, and control of the motor speed is more… Read more
Mar 13, 2015 | By Edvard Csanyi
Industrial Automation
10 Things to Consider When Selecting a High Quality Medium Voltage Drive
Medium voltage drives have been available for over 35 years, but have only recently achieved very high reliability and simplicity within the past few years. Below are 10 considerations on how I would go about specifying and selecting a very… Read more
Sep 17, 2014 | By Craig Hartman
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 directly related to shaft rotational speed, for a fixed impeller… Read more
May 09, 2014 | By Edvard Csanyi
Energy and Power
Effect of utility-induced surges in a steel mill with variable speed drives
A steel mill with variable speed drives (VSDs) had problems of frequent tripping of the VSDs with the indication overvoltage in AC line. Each tripping caused severe production disruption and resulted in considerable monetary loss due to lost production. Steady-state… Read more
Feb 12, 2014 | By Edvard Csanyi
Electric Motor
Keeping Motor At Correct Temperature When Connected To a Frequency Converter
When a motor is connected to a frequency converter it must be kept at the correct temperature, and this is subject to two types of influence: If the speed decreases, the cooling air volume goes down. If a non-sinusoidal motor… Read more
Jul 05, 2013 | By Edvard Csanyi
Energy and Power
An Introduction To SCADA For Electrical Engineers – Beginners
It is impossible to keep control and supervision on all industrial activities manually. Some automated tool is required which can control, supervise, collect data, analyses data and generate reports. A unique solution is introduced to meet all this demand is… Read more
Jun 19, 2013 | By Bipul Raman
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 be avoided. With rotodynamic pump installations, savings of between 30%… Read more
Apr 03, 2013 | By Edvard Csanyi
Electric Motor
PLC Application For Speed Control of AC Motors With Variable Speed (VS) Drive
A common PLC application is the speed control of AC motors with variable speed (VS) drives. The diagram in Figure 1 shows an operator station used to manually control a VS drive. The programmable controller implementation of this station will… Read more
Dec 29, 2012 | By Edvard Csanyi
Industrial Automation
Basic Mechanical Terms Used In Drives Applications
Terms below are the basic mechanical terms associated with the mechanics of DC drive operation. Many of these terms are familiar to us in some other context. Force Net Force Torque Speed Linear Speed Angular (Rotational) Speed Acceleration Law of… Read more
Dec 06, 2012 | By Edvard Csanyi
