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Topic: Capacitor


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  AMERICAN CAPACITOR CORPORATION - Capacitors proudly made in the United States of America   (Site not responding. Last check: 2007-11-02)
Capacitor designs include combination Metallized and Film and Foil types as well as multi series constructions.
Class 100 flow hoods are utilized in the winding process enabling the manufacturing of extremely high quality capacitors.
A large percent of what American Capacitor manufactures are custom made capacitors at catalog prices, specifically for customer requirements, send us your capacitor requirements or prints and we will design capacitors to meet them.
www.americancapacitor.com   (288 words)

  
  Sci.Electronics.Repair FAQ: Capacitor Testing, Safe Discharging and Other Related Information
Capacitors may be thought of as having pure capacitance (C) and some pure resistance (R), the two being in series.
DF is defined as Rc/Xc, the ratio of the R in the capacitor (Rc) to the reactance of the capacitor (Xc).
Smaller capacitors usually are not electrolytic and therefore tend to be relatively stable.
www.repairfaq.org /REPAIR/F_captest.html   (6386 words)

  
  Capacitor - MSN Encarta
The Leyden jar is a simple form of capacitor in which the two conducting plates are metal-foil coatings on the inside and outside of a glass bottle or jar that serves as the dielectric.
Capacitors are limited in the amount of electric charge they can absorb; they can conduct direct current for only an instant but function well as conductors in alternating-current circuits.
Large capacitors are also employed in power lines to resonate the load on the line and make it possible for the line to transmit more power.
encarta.msn.com /encyclopedia_761574900/Capacitor.html   (282 words)

  
  Capacitor - Wikipedia, the free encyclopedia
Capacitors are connected in parallel with the power circuits of most electronic devices and larger systems (such as factories) to shunt away and conceal current fluctuations from the primary power source to provide a "clean" power supply for signal or control circuits.
Capacitors are also used in parallel to interrupt units of a high-voltage circuit breaker in order to equally distribute the voltage between these units.
Capacitors are used as the sensor in condenser microphones, where one plate is moved by air pressure, relative to the fixed position of the other plate.
en.wikipedia.org /wiki/Capacitor   (3941 words)

  
 Flux capacitor - Wikipedia, the free encyclopedia
The flux capacitor is the fictitious core component of Doctor Emmett Brown's time traveling De Lorean DMC-12 in the 1985 movie Back to the Future, its two sequels, and the animated series.
In order to travel through time, the vehicle integrated with the flux capacitor needs to be travelling at 88 mph (141.6 km/h), and requires 1.21 gigawatts of power, originally supplied by a plutonium-powered nuclear reactor.
The flux capacitor prop was previously used as the oscillation overthruster in The Adventures of Buckaroo Banzai Across the 8th Dimension.
en.wikipedia.org /wiki/Flux_capacitor   (1349 words)

  
 Capacitor
Some capacitors are called electrolytics, meaning that their dielectric is made up of a thin layer of oxide formed on a aluminum or tantalum foil conductor.
Capacitors are also graded by their breakdown (i.e., smoke) voltage.
Capacitors rated for lower voltages are generally smaller in size and weight; you don't want to use too low a voltage rating, though, unless you enjoy replacing burnt-out capacitors in your creation.
encyclobeamia.solarbotics.net /articles/capacitor.html   (381 words)

  
 Shangyu Power Capacitor Co.,Ltd-Products introduced
Capacitor for electric induction heating system is applied to medium frequency electric induction heating system for improving power factor and loop quality.
High voltage shunt capacitor installation is applied to AC po- wer system with 50Hz for raising power factor, adjusting voltage of power grid, reducing transmission loss and raising the efficiency of transmission andtransformation facilities, so as to improve the quality of power supply.
High voltage shunt capacitor installation is comprised of capacitor cabinets or steel racks´╝îcapacitor,spe- cial fuses for capacitor overload protection, capacitor discharge device, air-cored reactor which is applied to restrain surge current and high freq.
www.sy-capacitor.com /Eng_prod.htm   (411 words)

  
 Capacitor Characteristics
Capacitors used in filter circuits are deliberately selected so that they cause the signal to roll off at the selected frequency, and this will be examined later in the article.
It is obvious that capacitor leads should be kept as short as possible, and it would be an advantage if manufacturers stopped spreading and kinking the leads of monolithic ceramics in particular, as this introduces a (small) additional inductance because of the lead length and reduces the maximum operating frequency.
Standard capacitors are perfectly acceptable for audio, and will rarely (if ever) compromise sound quality unless used beyond their ratings, or a completely inappropriate type is selected for the application (such as a high tempco ceramic in a filter circuit).
sound.westhost.com /articles/capacitors.htm   (10728 words)

  
 capacitor - The Columbia Encyclopedia, Sixth Edition - HighBeam Research   (Site not responding. Last check: 2007-11-02)
Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting material or dielectric (e.g., glass, paraffin, mica, oil, paper, tantalum, or air).
It describes the ratio of the capacitance of a dielectric-filled capacitor to a capacitor of the same size with a vacuum between the plates.
The main capacitor classifications are non-polarized (used for AC circuits) and polarized (used for DC circuits).
www.highbeam.com /doc/1E1:capacito/capacitor.html?refid=holomed_1   (324 words)

  
 Capacitors Tutorial, Dean Huster, Tony van Roon VA3AVR
Capacitors connected in parallel, which is the most desirable, have their capacitance added together, which is just the opposite of parallel resistors.
When a capacitor is shown as one straight line and one curved one, the curved line, which represents the outer case or electrode of the device, is assumed to be at a lesser potential than the straight one.
A capacitor with a value of 3.3fF is the same as a capacitor with a value of 3.3 x 10^-6 farads or 0.0000033 farads.
www.uoguelph.ca /~antoon/gadgets/caps/caps.html   (7692 words)

  
 networked_performance: Capacitor
Capacitor* is a group of interdisciplinary movement artists that accumulate energy from our technologically impacted culture and release it through innovative, multi-sensory performances.
Capacitor has created works that tackle the creation of the universe (Within Outer Spaces, 2001), the past and future of mankind (futurespecies, 2000), the modern phenomenon of video gaming (Avatars, 2002) and, most recently, a journey through the visible and invisible layers of the Earth (Digging in the Dark, 2004).
Founded in 1997, Capacitor is grateful for support from San Francisco's Grants for the Arts, California Arts Council, the Zellerbach Family Foundation, Altria Group, Inc., the LEF Foundation, Theatre Bay Area, and the American Composers Forum.
www.turbulence.org /blog/archives/000378.html   (378 words)

  
 The Capacitor
The simplest type is the parallel plate capacitor, illustrated in figure 17.1.
Capacitors come in many different geometries and the formula for the capacitance of a capacitor with a different geometry will differ from this equation.
The magnetic field which occurs when the charge on the capacitor is increasing with time is shown at right as vectors tangent to circles.
www.physics.nmt.edu /~raymond/classes/ph13xbook/node178.html   (594 words)

  
 Capacitors
Polystyrene capacitors can be damaged by heat when soldering (it melts the polystyrene!) so you should use a heat sink (such as a crocodile clip).
The standard capacitor values are based on this idea and they form a series which follows the same pattern for every multiple of ten.
Variable capacitors are not normally used in timing circuits because their capacitance is too small to be practical and the range of values available is very limited.
www.kpsec.freeuk.com /components/capac.htm   (1171 words)

  
 The capacitor filter
The capacitor (C1) shown in figure 4-15 is a simple filter connected across the output of the rectifier in parallel with the load.
The value of the capacitor is fairly large (several microfarads), thus it presents a relatively low reactance to the pulsating current and it stores a substantial charge.
The capacitor attempts to charge to the peak value of the rectified voltage anytime a diode is conducting, and tends to retain its charge when the rectifier output falls to zero.
www.tpub.com /neets/book7/27e.htm   (1489 words)

  
 ELECTRICITY MISCONCEPTIONS: Capacitor
The same number of electrons are in a "charged" capacitor as in a capacitor which has been totally "discharged." Yes, a certain amount of charge has been forced to flow momentarily during "charging," and a rising potential difference has appeared.
Yet in electronics, "capacitor" means only one thing: "two closely-spaced plates." As far as electronic equipment is concerned, capacitors only have two plates, and the current in one terminal must always equal the current in the other terminal.
Conventional capacitors in electronic equipment are different: the electrostatic coupling between their plates is extremely strong, the electrostatic coupling to the earth is nearly zero, and the current in the terminals connected to the two plates is always equal.
amasci.com /emotor/cap1.html   (2964 words)

  
 ELECTRICITY MISCONCEPTIONS: Capacitor
The same number of electrons are in a "charged" capacitor as in a capacitor which has been totally "discharged." Yes, a certain amount of charge has been forced to flow momentarily during "charging," and a rising potential difference has appeared.
Yet in electronics, "capacitor" means only one thing: "two closely-spaced plates." As far as electronic equipment is concerned, capacitors only have two plates, and the current in one terminal must always equal the current in the other terminal.
Conventional capacitors in electronic equipment are different: the electrostatic coupling between their plates is extremely strong, the electrostatic coupling to the earth is nearly zero, and the current in the terminals connected to the two plates is always equal.
www.amasci.com /emotor/cap1.html   (2964 words)

  
 Howstuffworks "How Capacitors Work"
In a way, a capacitor is a little like a battery.
A capacitor is a much simpler device, and it cannot produce new electrons -- it only stores them.
Capacitor 88-106 Mfd - MFD Rating 88-106 Voltage Rating 110-125 Volts Frequency 50/60 Hertz Overall Height 2 3/4 Capacitors
electronics.howstuffworks.com /capacitor.htm   (137 words)

  
 Understand Capacitor Soakage to Optimize Analog Systems
A capacitor exhibiting dielectric absorption acts as if during its long precharge time the dielectric material has soaked up some charge that remains in the dielectric during the brief discharge period.
Fig 2 depicts a simple model of this capacitor: When 10V is applied for 1 min, the 0.006-µF capacitor gets almost completely charged, but during a 6-sec discharge period it only partially discharges.
A practical method of getting good performance with less-than-perfect capacitors is to use a soakage-cancellation circuit such as one of the form shown in Fig 8, in which a capacitor of the type modeled in Fig 4 serves as an integrator.
www.national.com /rap/Application/0,1570,28,00.html   (1976 words)

  
 What is capacitor? - a definition from Whatis.com - see also: capacitance
In its simplest form, a capacitor consists of two conducting plates separated by an insulating material called the dielectric.
The capacitance is directly proportional to the surface areas of the plates, and is inversely proportional to the separation between the plates.
Large capacitors are used in the power supplies of electronic equipment of all types, including computers and their peripherals.
whatis.techtarget.com /definition/0,,sid9_gci211742,00.html   (284 words)

  
 capacitor — Infoplease.com
Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting material or dielectric (e.g., glass, paraffin, mica, oil, paper, tantalum, or air).
It describes the ratio of the capacitance of a dielectric-filled capacitor to a capacitor of the same size with a vacuum between the plates.
The main capacitor classifications are non-polarized (used for AC circuits) and polarized (used for DC circuits).
www.infoplease.com /ce6/sci/A0810266.html   (358 words)

  
 CapSite 2007
Most capacitor types require that air and moisture are sealed out to prevent degradation or contamination of the dielectric and corrosion of the metal film.
Film-foil capacitors are made of alternating layers of plastic film and metal foil, while metallized film capacitors have the metal vacuum deposited directly on the film.
Ceramic capacitors are especially suitable for surface mounting due to their heat resistance, mechanical integrity, and the ability to make them in very small packages at low cost, for portable equipment.
my.execpc.com /~endlr   (3523 words)

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