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Topic: VfD

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	Variable Frequency Drive - Wikipedia, the free encyclopedia
		When a VFD starts, the applied frequency and voltage are increased at a controlled rate or ramped up to accelerate the load without drawing excessive current.
		VFD controllers designed to operate at 110 volts to 690 volts are often classified as low voltage units.
		In this case, the chopper usually converts a low DC voltage (such as 12 volts) to the three-phase current used to drive the electromagnets that turn the permanent magnet rotor.
	en.wikipedia.org /wiki/Variable_Frequency_Drive (1226 words)

	Wikipedia:Requests for deletion - Wikipedia, the free encyclopedia
		Maybe VFD should be reformed, maybe it should be replaced, maybe a lot of people think it is good enough, but until we truly have an open discussion with problems and alternatives discussed we won't know.
		VFD is the only fair way of doing things, and this vote was not nearly publicised enough to make it a valid means of changing such a major policy.
		VfD voters tend to make confusing votes, such as "delete and redirect," "merge and delete," "keep and merge," that by their sheer diversity make it difficult for the closing admin to ascertain exactly what should be done.
	en.wikipedia.org /wiki/Requests_for_deletion (5267 words)

	VFD Power Quality Checklist (Site not responding. Last check: 2007-10-22)
		VFD system is supplied with input transformer to protect motor from common mode voltages.
		VFD systems using an input line reactor in lieu of an input transformer are unacceptable.
		VFD vendor shall have units of similar power circuit technology operating in the field for at least two (2) years.
	www.ece.umr.edu /links/power/Energy_Course/energy/Pow_quality/Var_freq_Drives.htm (484 words)

	Hoover Pumping Systems / VFD Tech Insight
		A VFD or drive is an electronic device that changes the frequency of the AC power going to a motor, thereby varying the motor speed.
		VFD manufacturers tend to be reluctant to honor their warranty if it can be shown that the problem was caused by excessive temperature, power surges or lightning.
		In that case, the VFD should include a cooling fan and fins to dissipate the heat and also be shielded from direct sunlight.
	www.hoover-online.com /VFD_Artical.aspx (1867 words)

	VFD Architects BV - Interior Design, Engineering and Architectural Design.
		VFD is the only association of architects in The Netherlands engaged in designing the interior of cruise liners.
		Another main activity of VFD within the scope of Interior design, is the selection of antiques and modern art for ships and large buildings, such as hotels, offices and hospitals.
		VFD covers the whole process from selection, purchasing, restoration, framing and design of art locations and mounting fixtures for the art.
	www.vfd.nl (629 words)

	The application of VFD’s in paint spray booths?
		However, modern VFDs are very efficient, (about 97.5 percent or better) and the difference between the calculated theoretical and VFD curves is very small.
		The role of the VFD is to maintain a constant pressure, by varying the speed of the fan.
		A 15 HP VFD, for example, would weigh approximately 20 lbs and have a dimension of 5 inches wide by 17 inches tall by 9 inches deep and could easily fit into an operator console, as shown in figure 8.
	www.mrotoday.com /mro/archives/exclusives/VFDs.htm (3630 words)

	Z8 11 digit VFD Display design note (Site not responding. Last check: 2007-10-22)
		The VFD filament is controlled directly by the CPU and will be pulsed at a frequency of 120Hz with a 50/50 duty cycle.
		VFD's require both grid and anode to be at a higher voltage than ground to allow segment illumination.
		VFD's, on the other hand, require both: lighted segments (Anodes), and digit selects (Grid) to be positive with respect to ground.
	www.cate.com.au /download/Z8/z8vfdcounter/z8vfd11_detailed.html (2533 words)

	Features Item : Vfd’s: When You’re Driven To Save Energy (Site not responding. Last check: 2007-10-22)
		In the hvac industry, vfd’s are usually found on motors that drive fans, blowers, pumps, cooling towers, etc. The Department of Energy reports that 64% of all electrical energy in the U.S. is consumed by electric motors.
		If there is any change in the sound of either the vfd or the motor, a problem might be indicated in the power section of the vfd, a bearing or insulation problem in the motor, or a wiring problem between the vfd and motor, says Mudge.
		Repeated fault trips of the vfd, depending upon the nature of the trip, could indicate a problem in the vfd, motor, power line, or a change in the load.
	www.achrnews.com /CDA/ArticleInformation/features/BNP__Features__Item/0,1338,73944,00.html (1152 words)

	Veterinary Feed Directive (VFD) Drugs
		The VFD solves this problem by allowing the veterinarian to order the use of VFD drugs in feed without the involvement of a pharmacist in the manufacture of medicated animal feed.
		However, VFD feed may be sent down the distribution chain if the consignee provides the distributor with a signed "acknowledgment" letter affirming that it will only ship the VFD feed to a VFD holder or to another distributor who supplies similar acknowledgment letter.
		Another area of concern is the length of time a VFD may be valid (expiration date) and the number of refills or reorders that may be allowed.
	www.michigan.gov /mda/1,1607,7-125-1568_2390_2440-8092--,00.html (585 words)

	Load Reactors - Increase VFD System Performance & Reliability (Site not responding. Last check: 2007-10-22)
		Motors operated on a VFD tend to run warmer than when they are operated on pure 60hz, such as in an across-the-line stator application.
		Utility tests conducted on VFD's with and without output reactors have documented efficiency increases of as much as eight percent (at 75% load) when the harmonic compensated reactors were used.
		Whether you are using reactors on the input or output of a VFD the best performance results will always be achieved using reactors which are fully compensated for the harmonics which are present.
	www.ece.umr.edu /links/power/Energy_Course/energy/Pow_quality/load.html (1050 words)

	AVMA -The Veterinary Feed Directive Veterinarian Factsheet (Site not responding. Last check: 2007-10-22)
		VFD medicated feeds will offer an alternative to prescription status for medicated feeds, requiring veterinary diagnosis for the use of these types of medicated feeds while enabling the feed industry to maintain current, sound practices in the manufacturing and distribution of feed.
		VFD products, like other animal medications, are approved by the Food and Drug Administration's Center for Veterinary Medicine (CVM).
		VFD forms will be printed in such a way that you may check off many of the items mentioned.
	www.avma.org /scienact/savetfs.html (414 words)

	Lathe - Variable Speed/VFD
		A consideration when obtaining VFDs to operate 3 phase motors from single phase input; a derating factor is usually given for the VFD, sometimes as much as 40% (depending on load).
		The VFD isn't a highly inductive load like the drive motor slaved to an idler motor, so it's not clear to me that all the phase relationships will support each other as is the case with a straight rotary system with two motors.
		VFD's are normally meant for 230v 3-phase 60 hz to 230v 3-phase 0-120 hz (or thereabouts).
	www.armurerieduroi.com /pages/lathe/lathe_variable_speed.html (10214 words)

	VFD (Site not responding. Last check: 2007-10-22)
		The First time V.F.D. is mentioned in the Academy, then, in Village, we learn that the village is called V.F.D. The VFD in this case stands for Village of Fowl Devotees.
		Though this is a VFD with "Volunteer" in the title, which, as we know from Jacques Snicket, is supposed to be in the title (Vile Village, pg 115), we can pretty much safely assume that this isn't it, for a couple of reasons.
		One, The Farm is the real VFD, and that's why LS is writing to them, or two, it's just a code so that when the right people come along (ie, other VFD'ers) they can retrieve his papers.
	www.angelfire.com /ga2/LoneWolf/SnickStuff/VFD.html (1238 words)

	VFD's FOR DUMMIES - Vincent Corporation
		VFD's have a built-in circuit breaker that shuts down the motor if the amps get too high for the speed at which the motor is being run.
		VFD's are good for only one voltage, either 208-220-240 volts or 440-480 volts.
		There are more sophisticated VFD models that work on both voltages, but Vincent does not have any of these in the rental fleet.
	www.vincentcorp.com /tech_papers/vfds_4_dummies.html (1061 words)

	CE-Bar VFD Home (Site not responding. Last check: 2007-10-22)
		CE-Bar VFD is a member of the Travis County Firefighter’s Association and the Capital Area Fire Chief’s Association.
		While most CE-Bar VFD alarms are of a medical nature, the department also responded to structure fires, car fires, rescues, hazardous materials incidents, motor vehicle accidents, grass fires, unreported control burns and false alarms.
		CE-Bar VFD apparatus and administrative offices are currently housed at 353 S Commons Ford Rd in the Austin Lake Estates community of Lake Hills off of Cuernavaca Drive.
	home.flash.net /~cebar (1051 words)

	5 Bears - VFD - Conclusion
		the side of the casting slopes inward by 3 or 5 degrees, and when the bracket was firmly mounted, the VFD head itself sat at an annoying angle relative to the head, with the outer left edge sloping down relative to the right edge.
		Knowing that the motor and VFD combination was delivering excellent torque, I replaced the motor sheave with my largest, which will reduce available torque, but increase the top speed to about 3,000 RPM.
		Note that when the VFD is at or near its peak output current, increasing the PWM carrier may force a current derate.
	www.5bears.com /vfd06.htm (1043 words)

	AVMA -The Veterinary Feed Directive Feed Industry Factsheet (Site not responding. Last check: 2007-10-22)
		VFD drugs offer an alternative to prescription status, allowing veterinarian supervision of these types of drugs while enabling the feed industry to maintain current good manufacturing practices with minimal disruption to the feed distribution.
		A VFD feed may not be distributed to a producer without a signed VFD form.
		Licensed feed manufacturers and distributors that ship a VFD feed to a downstream distributor or retailer for inventory must receive and retain a copy of a written acknowledgment, stating that the VFD feed will be further distributed only in accordance with FDA requirements.
	www.avma.org /scienact/safedfs.html (330 words)

	Home Theater PC News - Your Source for Everything HTPC Related (Site not responding. Last check: 2007-10-22)
		The VFD that Silverstone includes is connected using a parallel cable that you must run through the back of the case and connect to your motherboard's back I/O panel.
		Since this VFD seems to be almost identical to the one included in the Ahanix cases, I'll recommend they use LCDSmartie since people can download it off the internet for free.
		The VFD that they include with this new version of the LC03 is very legible from a distance, I could even read it at 15 feet while sitting on my recliner in the home theater room.
	htpcnews.com /main.php?id=silverstonelc03vfd_1 (1026 words)

	bit-tech.net \| Orac³ Part 2 (Site not responding. Last check: 2007-10-22)
		With one of the prime goals being to make the case look good when viewed from any angle, you will start to see an even distribution of wiring down both sides and an equal amount of attention paid to the details on whichever side they happen to be.
		VFD in action in it's housing along with the fan controller and a neon green acrylic front cover.
		The rear of the VFD module - chrome housing, power-on LED that lights up the neon green plexi rear mounting panel, chrome jack plug power and serial cable inside chrome shower hose.
	www.bit-tech.net /article/116 (502 words)

	Welcome to Red and Blackness Hardware Reviews
		Around a year ago when we started rbmods we reviewed a L.I.S LCD and tonite we are having a look at the follower to the popular plug and play LCD.
		This new VFD product has several new features and we are going to have a close look on this thing and see if it's better or worse than the LCD.
		This L.I.S VFD is a new type one for clearer letter and exiting of graphic effect than the previous product.
	www.rbmods.com /Articles/Vlsys/Vfd/1.php (596 words)

	Vacuum Fluorescent Display (VFD)
		The VFD is composed of three basic electrodes; the Cathode (Filaments), Anodes (Phosphor) and Grids under a high vacuum condition in a glass envelope.
		The VFD is composed of a vacuum envelope with a front glass and the base plate, in which cathode (filament), grid and anode are formed as the basic electrodes
		In this case, there are differences in the grid and anode voltages at the ends of the display pattern in the value of filament voltage, which requires correction of the filament structure.
	hem.passagen.se /communication/vfd.html (816 words)

	HOME
		It is one of the largest volunteer fire departments in the country with more than 350 volunteers and 160 full- and part-time employees assisting with weekday duty crews, EMS, dispatch and administrative duties.
		Hwy 6 and West Road — Cy-Fair VFD responded to a 2-11 apartment fire at the Easton Commons Apartment complex on Sunday April 23.
		The patient was being treated by CFVFD Ambulance 9 crews and at the scene decided because of the patient’s injuries that time was critical and called for Lifeflight to expedite the patient to Herman Hospital located in the Medical Center.
	www.cyfairvfd.com (1394 words)

	GruntvillE.com Case Modding, Overclocking, Hardware Reviews & Gaming Computers.
		Referred to as VFD's no doubt because both vacuum and fluorescent are quite hard to spell.
		First introduced in 1967 the VFD is a variation of the triode vacuum tube consisting of a cathode, grid, and anode sealed in a high- vacuum glass envelope.
		In an attempt to keep this review relevant to the defining features of the VFD series and included accessories, I'm simply going to ask you first read the other three reviews.
	www.gruntville.com /reviews/lcds/orbital_mx512/index.php (408 words)

	VFD
		With our VFD External Relay Option, you can use this instrument to interrupt your transmit control circuitry to protect your valuable station equipment in high V.S.W.R. conditions (wrong antenna, bad cable, ice, etc.).
		This feature adds a reed relay output to the VFD that you can use to inhibit a radio or amplifier when your preset V.S.W.R. limit is exceeded.
		The Power Monitor Option allows your VFD to monitor your transmitted power and gives you relay contacts to let you know that you are applying RF to an antenna.
	www.arraysolutions.com /Products/VFD.htm (559 words)

	Industrial VFD Cables suit AC motor drive applications., Belden Electronics Div.
		Conventional VFD cabling solutions, such as armored cable and lead wire conduit, are cumbersome and difficult to install and do not solve noise and corona discharge problems.
		All of Belden's VFD 1000V UL flexible motor supply cables meet applicable industry standards and offer the robust construction required for superior electrical performance and reliability in the most demanding industrial environments.
		Belden VFD cables are tested and approved for use in Rockwell Automation AC drives and are also suitable for use with drives from other major manufacturers.
	news.thomasnet.com /fullstory/470067/rss (1023 words)

	VFD (Vacuum Fluorescent Display Module) User’s Manual (Site not responding. Last check: 2007-10-22)
		VFD shall be considered as an independent device.
		Smartie 5.1 may not be 100% compatible with Samsung VFD.
		Although VFD is manufactured and supplied by Samsung, there is no driver and operation software support from Samsung.
	www.ahanix.com /support/vfd.html (360 words)

	VM Back
		New images created with VFD are pre-formatted with FAT12.
		If certain programs don't recognize a VFD drive, try changing the drive letter to A: or B:.
		If a VFD drive suddenly becomes unaccessible, try changing the drive letter.
	chitchat.at.infoseek.co.jp /vmware/vfd.html (949 words)

	The Green Button - VFD Driver for MCE 2005 (Site not responding. Last check: 2007-10-22)
		I'm using a 2x16 display, but this code should work for any VFD that is based on the Hitachi HD44780 chip (which I think they all are).
		A customizable driver for the LCD or VFD in your Media Center case.
		Awesome...now for a question, the reason never use these things, though both my MCE's have VFD on then, is that coming out of S3 standby kills the VFD output.
	www.thegreenbutton.com /community/shwmessage.aspx?ForumID=26&MessageID=71980 (1130 words)

	VFD Series (Site not responding. Last check: 2007-10-22)
		in your station, the VFD is for you!
		This option adds a reed relay output to the VFD that you can use to inhibit a radio or amplifier when your preset V.S.W.R. limit is exceeded.
		The VFD Relay Option is US$20, and the VFD Vanity Option is priced at US$20.The Power Monitoring Option is US$35.
	www.rfapps.com /vfd.htm (588 words)

	VFD Bayern Vereinigung der Freizeitreiter und Fahrer in Deutschland - Home
		Die VFD ist neben der FN die große Vereinigung der Reiter und Reiterinnen in Deutschland und bietet in Ergänzung des Breitensportes der FN das, was die immer größer werdende Zahl der Freizeitreiter und —fahrer benötigt, wie wichtige Informationen, Rechtsbeistand, Preisvorteile, Ausbildungsmöglichkeiten, Kommunikation und vieles mehr.
		Auch VFD Ausbilder/Prüfer, Ausbildungsstätten, Wanderreitstationen, Pferdebetriebe, Vereine und sogar pferdefreundliche Gaststätten können sich hier selbst eintragen, ihre Daten selbst verwalten und kostenlos hier bei VFD Bayern für sich und ihre Leistungen Werbung machen.
		Dieses Internetprojekt von VFD Bayern versteht sich als Teil der VFD-Group, der bundesweit tätigen VFD-Internet-Organisation, ist aber dennoch völlig eigenständig und unabhängig.
	www.vfd-bayern.de (572 words)

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