Feb 24, 2005 00:00
VFD, what is it and what does it do? A VFD is a variable frequency drive. It controls speed, torque, and horsepower of different types of machines. (Polka) You find these VFDs just about anywhere you go these days. Although you may not realize it but you they are found in malls, hospitals, factories, and we even have some here at good old DBCC.
“When applied properly, the VFD is the most effective motor controller in the industry today.” (Turkel) They are both affordable and reliable, have a flexibility of control, and offer a significant electrical energy savings through reduced electric bills. And we all know that a reduced electrical bill makes everyone happy. VFDs are used in a wide variety of applications for various reasons. For instance, they are the most effective energy savers in pump and fan applications, such as commercial air handlers (really big AC’s) and water chiller plants. They also enhance process operations. This is particularly where flow control is involved. Not only that but they provide soft-start capabilities. (Polka)
These ‘soft-start” capabilities not only decrease electrical stress and line voltage sags associated with full voltage motor start-ups, but it reduces the cost of part replacements. So not will you save an average of $200 a year in just fan belt replacements but you will be saving money from the energy efficiency. Plus we all get to enjoy the fact that these VFDs are also a lot quieter than the original “Full Voltage Magnetic Across the Line Starters”. I know you guys are looking at me like “what is that supposed to mean?” right? These older large pieces cost a lot of money to maintain, they took up a lot more space, were slower, and all around, were just no good. (Johnston)
So here we go from these big bulky Full Voltage Starters to these smaller sleeker VFDs. The average VFD is 4.72 in. wide x 14.14 in. high x 8.24 in. deep and this is on average a ¼ the size of the Full Voltage Starters they are replacing these days. (ABB 4) These units not only take up less space, but they run more efficiently with less energy required. All in all they save money, take up less room, are quieter, and far better than the old systems they are replacing. (Johnston)
One more speech down and only a few more to go. I am starting to dislike this class and I don't want to. My teacher is cool but I am not into this whole getting up in front of people and taling. I am a girl that would rather text you instead of calling you. I don't like confronting people unless it is essential or I am severely provoked. But anyway, I don't really like this speech as much as the last one but I will hopefully get a decent score on it tomorrow. Wish me luck.
P.S. I am such a slaker, at school and even at work and home... I SUCK...
So on a good note, I'm OUTTA HERE!!!!!
----ME----