Improving the efficiency of water pumps with VFD

With the increased use of variable frequency drives distributors such as Crompton Greaves, Schneider, and many others in India to have a wide range of variable speed drives to choose from, suitable in all areas. It is most often used for industrial purposes VFD and others to improve the efficiency in the motor pumps. The following is a look at how VFD improve the efficiency of the pump.........


What is VFD?
A frequency converter is used in adjustable speed electrical and mechanical steering systems to control AC motor speed of the motor by changing the input voltage and the drive frequency. They are used in applications ranging from small household appliances to large industrial machines.

How the VFD motor can benefit?
With rising energy prices and the need for highly efficient energy products, VFD is the complete savior! A VFD reduces engine speed to the actual speed required by the device
and thus save energy. With the reduction in engine speed, it does not just down energy consumption, but also reduce carbon emissions by industrial machinery levels.

When VFDs are used to manage water?
• The water pressure generally increases and flows either in the mouth or pump inlet. Often, pumps, and the areas of irrigation can not withstand a large force of water. In these moments, VFD can be used to limit the flow.
• In many irrigation areas, and often different flow rates required fields, but may be using a fixed speed pump. This is when the VFD has become customary. And it can be attached to a fixed pump and turn it into a variable speed pump.

When should you not use VFD?
• If you use a pump that determines that it requires a certain speed and a certain amount of pressure levels, not using VFD with it. Because in those moments VFD will attempt to change the pressure and pump speed and damage.
• In some cases, you only need variable rates for a short period. These are the times when you should not choose VFD, not because it will hurt your machine, but because it does not serve as a good return on investment. Each time you start VFD consumes 5% more energy and with many twists and turns, it ended up consuming a lot of energies and therefore not allow you to achieve satisfactory cost savings. In such cases, it is preferable to opt for 2 variable speed pumps.

The advantages of frequency inverters
• it can be converted to a variable speed pump of the fixed displacement pump with optimum performance in all operating points.
• benefit the consumer with a higher savings rate. When the device is reduced to 50% of the initial speed and the load is only 12.5%, which gives the user 87.5% saving. Alternatively, when it fell to 30% of the initial speed and VFD minimizing the load at 2.7%, which means a 97.3% economy!