- Inductor
Refimprove date December 2008 Infobox electronic component component Inductor photo Image Electronic ... File Inductor.svg An inductor or reactor is a Passivity engineering passive Electronic component ... through it. An inductor s ability to store magnetic energy is measured by its inductance , in units of Henry unit henries . Typically an inductor is a conducting wire shaped as a coil the loops ... of the amount of EMF generated per unit change in current. For example, an inductor with an inductance of 1 Henry unit henry produces an EMF of 1 volt when the current through the inductor changes ... An ideal inductor has inductance, but no Electrical resistance resistance or capacitance , and does not dissipate or radiate energy. A real inductor may be partially modeled by a combination of inductance ..., resistance and resistive losses in inductors grow due to skin effect in the inductor s winding wires. Core losses also contribute to inductor losses at higher frequencies. Practical inductors work ... . Circuits and materials close to the inductor will have near field coupling to the inductor s magnetic field, which may cause additional energy loss. Real world inductor applications may consider .... Applications Image Choke electronic component Epcos 2x47mH 600mA common mode.jpg thumb left An inductor ... radio frequency interference from being transmitted down the wire. Smaller inductor capacitor ... 24 ref An inductor is used as the energy storage device in some switched mode power supply switched mode power supplies . The inductor is energized for a specific fraction of the regulator s switching .... Larger value inductors may be simulated by use of gyrator circuits. Inductor construction Image Coils.jpg thumb 150px Inductors. Major scale in centimetres. An inductor is usually constructed as a coil ... it closely to the inductor, thereby increasing the inductance. Low frequency inductors are constructed ... to an inductor. Types of inductors Air core coil The term air core coil describes an inductor that does ... more details
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- File:Inductor symbol.PNG
Summary circuit representation of an inductor Licensing GFDL self with disclaimers migration relicense ... more details
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- Earth inductor compass
voltage is measured, allowing the Earth inductor compass to determine direction. History The earth inductor compass is an American invention. It was designed in 1924 by Morris Titterington at the Pioneer ..., the Earth inductor compass provided pilots with a more stable and reliable reference instrument. ref cite web title The Earth Inductor Compass publisher Wings Publishing url http www.oldbeacon.com beacon earth inductor compass.htm ref Problems with a magnetic compass at high altitude during flights ... how the compass works blockquote The operation of the earth inductor compass was very simple. The controller ... compass which was subject to rotation. Using the earth inductor compass aircraft could be navigated with much greater ease and accuracy than with an ordinary compass. One drawback with the inductor ... inductor compasses were used in the Douglas DWC s during the 1924 U.S. Army Air Corps Around the World flight. In 1927, another equally famous flight also employed the earth inductor compass. Charles ... earth inductor compass.htm The Beacon Aviation s Golden Age on the Internet ref blockquote Patents Ref patent country US number 2434324 status granted title Earth inductor compass gdate 1948 01 ... G01C17 36 External links http oldbeacon.com beacon earth inductor compass.htm The Beacon Aviation ... more details
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- File:Inductor distributed model.svg
Information Description A possible distributed element representation of a single layer solenoid inductor. Source Self created using Inkscape Date 30th November 2009 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font other versions Licensing cc by sa 3.0 Courtesy Spinningspark at Wikipedia KeepLocal ... more details
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- File:Inductor button.svg
Information Description Button image for use in templates Inductor Source Self created using Inkscape Date 21st May 2010 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font other versions Licensing cc by sa 3.0 Courtesy Spinningspark at Wikipedia KeepLocal ... more details
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- Pap-Ion Magnetic Inductor
Pap Ion Magnetic Inductor PAP IMI or Papimi ref http www.papimi.gr Manufacturers website ref is an energy medicine device. It is illegal for use in the United States due to lack of Food and Drug Administration FDA approval, ref name snakeoil cite web url http seattletimes.nwsource.com html medicaldevices date December 26, 2008 work Seattle Times title Miracle Machines The 21st Century Snake Oil ref ref http seattletimes.nwsource.com html localnews 2004022169 miraclegolob19m0.html Risky devices found in Issaquah, Bellevue , Seattle Times , 19 November 2007 ref Jay Inslee of the House Energy and Commerce Subcommittee on Oversight and Investigations states that it claims to pulse the body with electromagnetic waves, has been marketed as a rapid healing machine to patients suffering cancer, AIDS, chronic fatigue and allergies, among other health problems. The device is described as potentially dangerous . ref http www.house.gov inslee issues health medical devices.html Letter from rep. Jay Inslee House Energy and Commerce Subcommittee on Oversight and Investigations , 20 November 2007. ref Actor Dan Haggerty has appeared in commercial endorsements for the device, although there is no evidence he was aware of the legal and ethical problems associated with it at the time he agreed to endorse it. ref name snakeoil Although importation of the device to the US is illegal, a number of machines were imported under false descriptions. ref cite news url http www.sunjournal.com node 101645 title Federal agency bans import of fugitive s miracle machines date 9 December 2007 work Sun Journal location Seattle ref References reflist Category Pseudoscience health stub ... more details
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- Single-ended primary-inductor converter
Image SEPIC Schematic.gif thumb 500px right Figure 1 Schematic of SEPIC Single ended primary inductor converter SEPIC is a type of DC to DC converter DC DC converter allowing the electrical potential voltage at its output to be greater than, less than, or equal to that at its input the output of the SEPIC is controlled by the duty cycle of the control transistor. A SEPIC is similar to a traditional buck boost converter , but has advantages of having non inverted output the output voltage is of the same polarity as the input voltage , the isolation between its input and output provided by a capacitor in series , and true shutdown mode when the switch is turned off, its output drops to 0 V. SEPICs are useful in applications in which a battery voltage can be above and below that of the regulator s intended output. For example, a single lithium ion battery typically discharges from 4.2 volts to 3 volts if other components require 3.3 volts, then the SEPIC would be effective. Circuit operation The Circuit diagram schematic diagram for a basic SEPIC is shown in Figure 1. As with other switched mode power supply switched mode power supplies specifically DC to DC converter s , the SEPIC exchanges energy between the capacitor s and inductor s in order to DC to DC converter convert from one voltage to another. The amount of energy exchanged is controlled by switch S1, which is typically ... the inductor L1 never falls to zero. During a SEPIC s steady state operation, the average voltage across ... direct current DC , the average current across it I sub C1 sub is zero, making inductor L2 the only source of load current. Therefore, the average current through inductor L2 I sub L2 sub is the same ... cycle of resonance with inductor L2, and by this time the current in inductor L1 could be quite ... of capacitor C1 and inductor L2. Inductor L1 and switch S1 create a standard boost converter , which ... if the electric current current through the inductor L1 is allowed to fall to zero. Reliability and Efficiency ... more details
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- File:Series inductor button.svg
Information Description Button image for use in templates Inductors in series Source Self created using Inkscape Date 30th May 2010 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font other versions Licensing cc by sa 3.0 Courtesy Spinningspark at Wikipedia KeepLocal ... more details
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- File:Parallel inductor button.svg
Information Description Button image for use in templates Inductors in parallel Source Self created using Inkscape Date 30th May 2010 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font other versions Licensing cc by sa 3.0 Courtesy Spinningspark at Wikipedia KeepLocal ... more details
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- Sweep generators
These circuits are mostly transistor circuits with inductor s and capacitor s to create linear characteristics. Category Electrical circuits electronics stub Also these are very commonly used for practicals with cro s. ... more details
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- File:Grassot Fluxmeter constant determination.svg
Summary Grassot fluxmeter constant determination setup using a standard mutual inductor and a known quantity of electrical discharge. Licensing self cc zero ... more details
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- File:Mutually inducting inductors.PNG
Summary A picture of the usual depiction of mutual inductance. The two vertical lines between the inductors indicate a solid core that the wires of the inductor are wrapped around. n m shows the ratio between the number of windings of the left inductor to windings of the right inductor. This picture also shows the dot convention . Licensing GFDL self with disclaimers migration relicense ... more details
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- Self-resonant frequency
Refimprove date November 2006 In electronics , capacitor s and inductor s have parasitic inductance and parasitic capacitance capacitance , respectively. For a capacitor, the inductance is primarily due to the physical dimensions including the leads. The lead inductance can be calculated using the equation Ldc 2L ln 2L r 0.75 nH where Ldc is the low frequency or DC inductance in nano henries, L is the wire length in cm, and r is the wire radius in cm. ref Electromechanics A First Course in Electromechanical Energy Conversion, Hugh Hildreth Skilling, ISBN 0882757946 ref Since a capacitor and inductor in series creates an electronic oscillator oscillating circuit , all capacitors and inductors will oscillate when stimulated with a step impulse . The frequency of this oscillation is the self resonant frequency SRF . Inductors have both inductive and capacitance tendencies. SRF is the frequency, typically rated in MegaHertz MHz , that an inductor takes on enough of the capacitive tendencies that they cancel out the inductive tendencies, thus rendering this device useless as an inductor. At this frequency the inductor acts purely resistive and above this frequency will begin to act like a capacitor. A capacitor or inductor behaves ideally only when its working frequency is well below the self resonant frequency. As its working frequency increases, the effects of the parasitic inductance or capacitance became more pronounced until its self resonant frequency, when the effective capacitance or inductance is zero since it is canceled by its counterpart. This number is commonly published for each capacitor or inductor by the manufacturer. British electronics engineer Ivor Catt controversially argues against the existence of a self resonant frequency for capacitors. ref name Capacitor Self Resonant Frequency http www.ivorcatt.co.uk 26031.htm Ivor Catt on self resonant frequency ref References Reflist DEFAULTSORT Self Resonant Frequency Category Electronics terms Electron stub ... more details
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- Dot convention
Unreferenced date December 2009 In circuit analysis, the dot convention is a Convention norm convention used to denote the voltage Polarity physics polarity of two mutual inductance mutually inductive components, such as winding on a transformer . The Electrical polarity polarity of all dotted terminals will be the same at any particular time, assuming an ideal transformer with no leakage inductance . Image Mutual inductance.PNG Sinusoidal AC For sinusoidal AC such as the mains, the convention can be thought of in either of the following ways The Electric current current going into one dot either dot tries to come out the other dot. Into meaning from the dot toward the inductor , and conversely out meaning from the inductor toward the dot. Current going into a dotted terminal of the inductor induces a positive voltage at the other dot. Conversely, current leaving a dotted terminal induces a negative voltage at the other dot. DEFAULTSORT Dot Convention Category Electronics terms zh ... more details
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- File:NotchFilter 1591hz.png
Summary This is a drawing of a very simple notch filter. The resonant frequency of this circuit is 1 sqrt LC which is 1591.5 Hz. The series impedance of the capacitor and inductor at this frequency is zero, which yields zero output. See also Image Analysis NotchFilter 1591hz.png Analysis NotchFilter 1591hz.png . Licensing PD self date November 2007 ... more details
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- File:Pudagla-Greifenwappen.JPG
Summary Information Description CoA of the House of Pomerania , Pudagla palace Source de Datei Pudagla Greifenwappen.JPG Date 24.09.2007 Author Inductor Permission GNU free licence http de.wikipedia.org w index.php?title Datei Pudagla Greifenwappen.JPG&filetimestamp 20071013142051 other versions Licensing GFDL migration review ... more details
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- File:Bridge T with non-ideal inductor.svg
Information Description LF Bridge T equaliser with non ideal inductor. Circuit showing constant resistance compensation for inductor resistance Source Self created using Inkscape. Date 19th September 2008 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font real life identity SHA 1 commitment ba62ca25da3fee2f8f36c101994f571c151abee7 other versions Licensing self cc by sa 3.0 KeepLocal ... more details
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- Capacitor-input filter
refimprove date April 2010 The capacitor input filter , also called pi filter due to its shape that looks like the Greek alphabet Greek letter pi letter pi , is a type of electronic filter . Filter circuits are used to remove unwanted or undesired frequencies from a signal. Image Capacitor input filter.svg A typical capacitor input filter consists of a filter capacitor C1, connected across the rectifier output, an inductor L, in series and another filter capacitor, C2, connected across the load, RL. A filter of this sort is designed for use at a particular frequency, generally fixed by the AC line frequency and rectifier configuration. When used in this service, filter performance is often characterized by its Voltage regulation regulation and Ripple electrical ripple . The capacitor C1 offers low Reactance electronics reactance to the AC component of the rectifier output while it offers infinite reactance to the DC component. As a result the capacitor shunts an appreciable amount of the AC component while the DC component continues its journey to the inductor L The inductor L offers high reactance to the AC component but it offers almost zero reactance to the DC component. As a result the DC component flows through the inductor while the AC component is blocked. The capacitor C2 bypasses the AC component which the inductor had failed to block. As a result only the DC component appears across the load RL. References reflist See also Electronic filter topology contains a general definition of a pi section filter topology, of which this is an example DEFAULTSORT Capacitor Input Filter Category Linear filters Category Analog circuits Category Electronic filter topology sr sv Pi filter ... more details
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- Flyback diode
source connected to an inductor with a switch, we have 2 states available. In the first steady state, the switch has been closed for a long time such that the inductor has become fully energized ... terminal of the voltage source to its negative terminal, through the inductor. When the switch is opened Figure 2 , the inductor will attempt to resist the sudden drop of current dI dt is large therefore ... supply, but it is still in contact with the inductor pulling down a negative voltage. Since .... A flyback diode solves this starvation arc problem by allowing the inductor to draw current from ..., the diode becomes forward biased relative to the inductor instead of the power supply as before , allowing it to conduct current in a circular loop from the positive potential at the bottom of the inductor ... at the top of the inductor prior to the switch being opened . The voltage across the inductor will merely ... and the inductor according to National Instruments, the flyback diode should be no greater than 18 inches from the inductor . Total time for dissipation can vary, but it will usually last ... elimination through the use of a flyback diode 1N4007 . The inductor in this case is a solenoid connected ... set to trigger when the voltage across the inductor dipped below zero. In Figure 1 we see the voltage ... the diode , low forward voltage drop, and a reverse breakdown voltage suited to the inductor s power ... an energized inductor. Schottky diode s are preferred in flyback diode applications, because they have ... energy from wires connected to the inductor, the flyback diode should be connected as physically close to the inductor as practicable. This approach also minimises those parts of the circuit ... at an inductor is, by the law of electromagnetic induction and the definition of inductance math ... more details
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- Hanna curve
Orphan date February 2009 File Hanna curve by Zureks.svg thumb right 320px An example of Hanna curve for a gapped inductor Hanna curve a curve defining magnetism magnetic parameters of an inductor . ref http www.dextermag.com uploadedFiles Literature Fair Rite Direct Current Inductance.pdf Fair Rite Products Corp., The Effect of Direct Current on the Inductance of a Ferrite Core ref ref http books.google.co.uk books?id ur2ieG8JuPoC&pg PA151&lpg PA151&dq hanna curve&source web&ots Otd52 P7Tb&sig XoEp vgQ Pvqkt1W8zDFVn2mtSo&hl en&sa X&oi book result&resnum 1&ct result PPA152,M1 Alex Goldman, Magnetic Components for Power Electronics ref Hanna curves help in finding optimum working conditions maximum energy stored in an air gap for an inductor. Several parameters are taken into account, including magnetic field or flux density level, size of an air gap , physical dimensions of the magnetic core , number of turns of the winding , etc. ref http info.ee.surrey.ac.uk Workshop advice coils gap index.html len Example of calculation of Hanna curve ref References reflist Category Magnetism ... more details
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- Discrete device
A discrete device or discrete component is an electronic component with just one circuit element , either passive component passive resistor , capacitor , inductor or active component active transistor or vacuum tube , other than an integrated circuit . Several discrete devices are combined to form a discrete circuit . Such discrete circuits are different from integrated circuit s and hybrid circuit s, which are built from several circuit elements in one Chip carrier package . br It typically refers to semiconductor device s. Examples are Discrete transistor Transistor Diode TRIAC LED Passive devices Resistor Capacitor Inductor References references DEFAULTSORT Discrete Device Category Electrical components ca Component discret de Diskretes Bauelement fr Composant discret ... more details
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- ?uk converter
source through the inductor L sub 1 sub . When in the On state, the capacitor C transfers the energy ... two inductor s, two capacitor s, a switch usually a transistor , and a diode . Its schematic can be seen ... time scale an inductor can be considered as a current source as it maintains a constant current ... a capacitor with a current source the inductor prevents resistive current limiting and its associated .... The energy in an inductor is given by math E frac 1 2 LI 2 math This implies that the current through ... of the current through an inductor is related to the voltage across it math V L L frac dI dt math it can be seen that the average value of the inductor voltages over a commutation period have ... o sub are large enough for the voltage ripple across them to be negligible, the inductor voltages become in the off state, inductor L sub 1 sub is connected in series with V sub i sub and C see figure ..., inductor L sub 1 sub is directly connected to the input source. Therefore math V L1 V i math . Inductor L sub 2 sub is connected in series with C and the output capacitor, so math V L2 V o V ... . Discontinuous mode Pi Po Current Voltage Related structures Inductor coupling Instead of using two discrete inductor components, many designers implement a coupled inductor uk converter , using ... between the inductors inside that component gives a coupled inductor uk converter lower output ripple than a uk converter using two independent discrete inductor components. ref http boostbuck.com ... more details
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- Dynatron oscillator
of inductor and capacitor was connected would oscillate at its natural frequency a very ... more details
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- File:RF Suppression Toroid.jpg
Summary An Radio Frequency RF Suppression toroid used to block radio signals from entering a microphone preamplifier through the long mic cable. Note how the turns go through the center of the core. Each time the wire goes through the hole, it is counted as one turn. Thus, this is a 4 turn inductor. Licensing PD self date October 2006 ... more details
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- File:Reactance L.svg
Information Description Plot of reactance of an inductor Source Self created using Inkscape Date 1st June 2010 Author User Spinningspark font style background FFF090 color 00C000 Sp font style background FFF0A0 color 80C000 in font style color C08000 ni font font font style color C00000 ng font font font style color 2820F0 Spark font other versions Licensing cc by sa 3.0 Courtesy Spinningspark at Wikipedia KeepLocal ... more details
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