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High Quality Variable-frequency drive-lx3100_01

High Quality Variable-frequency drive-lx3100_01

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A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.

VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service,[5] and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.

Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.

VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.

System description and operation

VFD system

A variable-frequency drive is a device used in a drive system consisting of the following three main sub-systems: AC motor, main drive controller assembly, and drive/operator interface.

AC Motor

The AC electric motor used in a VFD system is usually a three-phase induction motor. Some types of single-phase motors can be used, but three-phase motors are usually preferred. Various types of synchronous motors offer advantages in some situations, but three-phase induction motors are suitable for most purposes and are generally the most economical motor choice. Motors that are designed for fixed-speed operation are often used. Elevated-voltage stresses imposed on induction motors that are supplied by VFDs require that such motors be designed for definite-purpose inverter-fed duty in accordance with such requirements as Part 31 of NEMA Standard MG-1.

Q:I am planning to buy a big guitar amp from america and you dont want to mess around with something as powerful as that so i want to know is there suitable adapters out there for such a job? because i heard that some electrical equipment from America will eventually burn out if you use it in Ireland!!help!?!?!
As long as you get a proper adapter that can handle the load, you should be fine
Q:How can I ensure my computer is properly backed up and the back-up files are unaffected by the sun? Would putting everything on CDs and DVDs work? Which would be better; an external hard disk drive or an external optical hard drive or jusr DVDs/CDs?
NASA aren't predicting any 'once in a generation solar storm'. They are merely saying that warning and protection systems should be in place - a perfectly reasonable precaution. In fact NASA are predicting the next maximum of solar activity in 2013 to be less intense than the last in 2001: solarscience.msfc.nasa /images Solar activity can produce induced currents in transmission lines, very occasionally leading to problems in electricity supply and distribution, so the worst that might happen is a power cut. The Sun does not directly affect your computer or any other electrical equipment. You certainly don't need any lead casing. Having said that, backing up your computer files is never a bad idea. No medium is completely immune to damage, whether heat, damp, power surges or physical damage so maybe you should put your more important files on both DVD and an external drive.
Q:I'm comparing the GP 6500 with 389 cc engine (splash lubrication) to the XG 6500 with a 410 cc industrial engine (oil pump pump lubrication). I would be using it for home emergency use, so I doubt I really need the industrial engine with oil pump. Over 10 years it will probably only get 100 hours on the engine mostly at a consistent 50% load with occasional short term peaks closer to max (toaster, sump pump coffee pot, etc). So I'm leaning towards the cheaper GP. But want to consider the following:Are they both easy to pull start? The biggest engine I pull start is my snowblower with a 250cc OHV Briggs. But when starting only the engine is turned, i.e. it's not engaged to the snowblower yet. The hardest thing I have to start is my power washer with a 160cc OHV Kohler. I think because it's directly connected to the pump which makes it harder to start.Is the XG industrial engine quieter than the GP engine?
This Site Might Help You. RE: Has anyone compared the Generac GP generators vs the XG genertors? I'm comparing the GP 6500 with 389 cc engine (splash lubrication) to the XG 6500 with a 410 cc industrial engine (oil pump pump lubrication). I would be using it for home emergency use, so I doubt I really need the industrial engine with oil pump. Over 10 years it will probably only get
Q:I was wondering, if everyone on earth was to disappear and there was no one to work the electrical grid, how long would it take for 1] The electrical power lines themselves to decay?2] The electrical substations to break down?3] The transformer units to break down?4] Any other electrical equipment to break [such as those boxes on the power lines, as well as ANY other piece of equipment on the electric grid]?P.S- Don't give how long it would take for the power stations to stop running, I already know that. Just answer the four questions I asked.
The lines are mostly copper or aluminum for the wires themselves. The towers are steel. They would last for decades easily. But lines that run from transformers to homes or neighborhoods could fail earlier. Look at what happens with ice storms in New England. Substations and transformers would last quite long also. But the power stations would last for anywhere from hours to weeks, depending on the degree of automation, and on chance. .
Q:If i were to give a hybrid vehicle to a teenager, and they decided to add a bunch of high powered electrical equipment:1. Does this utilize the same battery that the car motors use to propel the car.2. Do gas-electric hybrids have alternators capable of generating electricity while the car is running?3. What are the limitations of adding additional electrical accessories to the car? ie. DVD players, video screens, amplifiers, extra power outlets for laptops
1 Yes there is a seperate battery for auxillaries and a seperate battery that runs the electric motor/charger. 2 the alternator that runs the auxillaries is a normal 60 to 90 watt unit. It cannot charge the batteries that drive the car. 3 no differant than addind to a regular car.
Q:I have a garage full of my dad's old equipment from oscilloscopes, amplifiers, circuit board materials, etc. that I don't know what they are/or are worth, or how to go about selling. Does anyone have any suggestions other than listing everything individually (there is a lot) on OKorder or CraigsList? I'm leaning towards hiring someone to come in and auction it all off for me, but need suggestions.Thanks!
You might be able to list on OKorder (or CraigsList) as a LOT. Sell all for a set price, with pictures and text til you get tired of doing it. I expect you would not get so much money, but it might be easier. Since the stuff is related, some single bidder might be interested in several of the pieces. You might also offer something like winning bid gets pick of any seven single items or some such intermediate solution. You might also find a Radio Amatuer or Ham. They have 'hamfests' where they sell and trade such things.
Q:I have a school project (Construction management) that involves the estimating of the electrical cost for a building addition. I can do the fixture counts, equipment hook ups, box counts, switches and etc. I cant figure out how much wiring would be involved. from the blueprints, is there a way to measure (estimate) the lf of wiring? this is a school building so there are mostly medsize room and hallways. any help would be great. I remember something about the homerun count from when i was a laborer, but could i figure 1 line around the room with a line for fixtures or something like that. doesnt have to be perfect by any means.
You aren't giving anything even close to enough info for an estimate.If you have set of plans you would have to go to the electrical specs. and find out what needs to be included. ie; additional panels,increased service from electric co., computer class rooms, fire alarm, wiring in conduit.the list goes on and on, your not just adding a few lights and outlets., what about HVAC that all requires elect. Good luck!
Q:I am a freshman electrical engineering student and I have been given an assignment in which I have to write a 2 page paper about electrical engineering drawings. The paper has to include specific requirements for drawings in this field of engineering, any standards that are used, and any drawing codes that should be included in a typical drawing.Any help would be greatly appreciated.
Certain groups like NASA, the US government, etc have specific requirements for all drawing including electrical drawings. Some engineering companies and industrial companies have standards as well. Basically any engineering drawing has to address to tasks to be done, the materials and equipment to be used, the codes and standards to be met, and any specific requirements that are over and above common practice. A specific requirement might be something like stating the color coding for wiring that could be unsual. Look at the results of a simple online search for more information.
Q:i need to take my house hold to san diego and need to know to ship them by ground how much will it cost and who will do that? which company? it is 10 pieces overal cost of $15000is it worth taking them with me because selling them with only cover maybe $6000 and replacing them there is more expensive. need help please.
10 pieces of what. if it is electrical equipment (radio, TV. and the like) make sure it is the same plugs and wattage outlets before shipping. as they may not work. next get quotes from shipping companies. do a web search for shipping companies in your area. like shipping companies+Ontario what you get is a web page of shipping companies click on the link below to see
Q:1.What is Rated AC voltage? Why we would like to state Rated instead of Nominal?2.What is Nominal AC voltage?3.Explain rms value for AC voltage. What is it's relation to Rated/Nominal Voltage?
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