What to Know of to Pick the Best Variable Frequency Drive for an Application
By and large, a variable frequency drive may well prove to be the best tool you are to find for you to ensure good operation and power reduction for your motors. As you consider the alternative drives for an application, some of the general aspects you will be required to look at are the torque and the amp developed by the AC motor. There are those who have thought that the horsepower of the drive is the most critical and the sole feature to look for in a variable frequency drive to settle for to address their needs. Though this has been the belief for many, the horsepower isn’t to be the only thing to be concerned with when choosing a variable frequency drive as the load element must as well be taken into consideration when this is the need. Generally, when it comes to the size determination for a variable frequency drive for any given use, this size is going to be decided on having taken a look at the torque and the amp developed by the AC motor. The load factor of a VFD is always given or represented in amps.
Care and caution matter when it comes to the choice of a variable frequency drive for your needs just like it is often the case with any instrument or control device. In order to make an informed decision for the one you will be going for looking at your needs, at least have some basic idea or knowledge about these devices. You need to appreciate the fact that control using a variable frequency drive is not similar to control using a control valve.
Installation, staff skill levels and training required are some of the things that you should take a look at when settling for the best variable frequency drives for your needs.
Now, when it comes to the installation of the variable frequency drives, for some it sounds so simple and easy but in actual sense, it isn’t as simple as it sounds and seems. In order to ensure that they are indeed perfectly installed, you should ensure that you are following the recommended procedures and protocols as laid out by the manufacturers and the national electrical codes for the installation of these devices.
For instance, you should take into consideration the wire and cable size as you install these drives. Pay a particular attention to the need to have them mounted on shielded cables so as to ensure that their installation doesn’t cause any interference to the other plant instruments in use in the business. Added to this you must as well take a look at the power distribution and impedance so as to know whether there will be a need for an isolation transformer or a line reactor.