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Topic: Inductor

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	Inductor
		The resistance of the rheostat and the inductance of the inductor are capable to be varied by dragging their sliders.
		The blue one represents the current in the circuit while the transient red one is the induced current caused by the inductor.
		The polarities of the inductor are also shown in the conventional colors: red(+), fl(-).
	www.ngsir.netfirms.com /englishhtm/RL.htm (0 words)

	Inductor physics
		Well the philosophy behind the inductor is that flux lines can generate voltage, this is used to alter waveforms in circuits where there is a presents of ripple current.
		When current has reached its peak the inductor stops working until there is a disruption in current flow like in the case of ripple current or in the case of audio applications or power supplies.
		To flatten down the waveform you would use a device related to the inductor, known as the capacitor which is basically an inefficient battery that only holds a charge for fractions of a second but is perfect in an alternating DC circuit.
	www.compworks.faithweb.com /electronics/components/inductor001.html (820 words)

	Inductor Basics
		In an ideal inductor, the current lags behind the voltage by 90° or π/2 radians, but since physical inductors are made from wire that has resistance, a combination resistive-inductive circuit results causing the Q of the tank to be lower.
		The inductor is energized for a specific fraction of the regulator's switching frequency, and de-energized for the remainder of the cycle.
		As inductors tend to be larger and heavier than other components, their use has been reduced in modern equipment; solid state switching power supplies eliminate large transformers, for instance, and circuits are designed to use only small inductors, if any; larger values are simulated by use of gyrator circuits.
	www.tabtronics.com /TECHNOLOGY/ElectromagneticBasics/InductorBasics/tabid/109/Default.aspx (1301 words)

	Inductor Summary
		An inductor is a passive electrical device employed in electrical circuits for its property of inductance.
		An inductor is usually constructed as a coil of conducting material, typically copper wire, wrapped around a core either of air or of ferromagnetic material.
		The quality factor (or Q) of an inductor is the ratio of its inductance to its resistance at a given frequency, and is a measure of its efficiency.
	www.bookrags.com /Inductor (2096 words)

	Class Definition for Class 336 - INDUCTOR DEVICES
		Adjustable inductor devices wherein the inductance variation is attained by changing the physical shape of either the coil or core or both, usually by physically displacing portions of the coil or core relative to other portions of the coil or core respectively, by bending, twisting or stretching.
		Adjustable inductor devices in which the inductance varying element is adjusted in response to the magnetic force existing between the magnetic elements (e.g., between the core and coil or between coils) of the inductor device.
		Subject matter in which the inductor device has a circumambient liquid or gaseous insulating medium in contact with its coil or core and wherein means, such as a pump or fan, is included to force the medium to circulate for the purpose of effecting a heat exchange between the medium and the inductor device.
	www.uspto.gov /go/classification/uspc336/defs336.htm (5841 words)

	The Inductor (Site not responding. Last check: )
		The inductor is a coil of wire which may or may not have a center, or "core".
		An inductor's characteristics are typically the opposite of the capacitor's characteristics.
		The inductor is energized with a magnetic voltage equal to the source voltage of 12 volts DC.
	members.aol.com /radelkopf/inductor.html (570 words)

	Inductor@Everything2.com
		If the inductor is at zero state and then current is run through it, it will initially not let the current by, acting like an open circuit.
		Inductors have inductance, usually represented by the letter L. The unit for inductance is the henry.
		The impedance of an inductor is equal to L * S, where S is is equal to j * omega.
	www.everything2.com /index.pl?node=inductor (445 words)

	FEEE - Fundamentals of Electrical Engineering and Electronics: Magnetic fields and inductance
		Although a simple coil shape is the generic symbol for any inductor, inductors with cores are sometimes distinguished by the addition of parallel lines to the axis of the coil.
		When an inductor is faced with an increasing current, it acts as a load: dropping voltage as it absorbs energy (negative on the current entry side and positive on the current exit side, like a resistor).
		When an inductor is faced with a decreasing current, it acts as a source: creating voltage as it releases stored energy (positive on the current entry side and negative on the current exit side, like a battery).
	www.vias.org /feee/inductor_02.html (1407 words)

	PARC High-Q Integrated Inductor Coil Solutions
		High-quality, low-loss inductors are the last remaining components still not successfully integrated on ICs (integrated circuits).
		Substrate material beneath inductor is removed or coils are suspended—this eliminates eddy currents but does not address skin-effect losses, wasted wafer space, or fragility of suspended coils.
		PARC’s StressedMetal™ on-chip, out-of-plane inductor coils achieve higher Qs partly because the coil axis is parallel to the substrate plane.
	www.parc.com /research/projects/stressedmetal/oopcoil.html (611 words)

	The Dispatch - Serving the Lexington, NC - News
		An inductor is usually constructed as a coil of conducting material, typically copper wire, wrapped around a core either of air or of ferromagnetic material.
		The inductor is energized for a specific fraction of the regulator's switching frequency, and de-energized for the remainder of the cycle.
		As inductors tend to be larger and heavier than other components, their use has been reduced in modern equipment; solid state switching power supplies eliminate large transformers, for instance, and circuits are designed to use only small inductors, if any; larger values are simulated by use of gyrator circuits.
	www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=inductor (1405 words)

	RFC - Inductor
		Inductors are commonly used for filtering, amplifying, or for creating resonant circuits used in radio-frequency applications.
		The layout of a 10nH inductor is typically a square spiral, since standard CMOS processes constrain all angles to be 90° (Figure 12-3).
		The variation of the resonant frequency with the capacitor and inductor is proposed in figure 12-8.
	www.lesia.insa-toulouse.fr /~bendhia/Cours/RF/rfc_inductor.html (1257 words)

	AC Inductor Circuits - Reactance And Impedance - Inductors
		It means that the inductor is releasing power back to the circuit, while a positive power means that it is absorbing power from the circuit.
		What this means in a practical sense is that the reactance of an inductor dissipates a net energy of zero, quite unlike the resistance of a resistor, which dissipates energy in the form of heat.
		An inductor's opposition to change in current translates to an opposition to alternating current in general, which is by definition always changing in instantaneous magnitude and direction.
	www.opamp-electronics.com /tutorials/ac_inductor_circuits_2_03_02.htm (1408 words)

	inductor. The Columbia Encyclopedia, Sixth Edition. 2001-05 (Site not responding. Last check: )
		An inductor is usually connected into a circuit in order to raise the inductance to a desired value.
		Since inductance is a property that varies with frequency, inductors range from a single loop in a length of wire (used at ultrahigh frequencies), through spirals in the copper coating of an etched circuit board (used at very high frequencies), to large coils of insulated wire wound onto iron or ferrite cores.
		For radio use, inductors often have air cores to avoid the losses caused by magnetic hysteresis and by eddy currents that occur when solid cores are used.
	www.bartleby.com /65/in/inductor.html (205 words)

	What is inductor? - a definition from Whatis.com - see also: inductance
		An inductor is a passive electronic component that stores energy in the form of a magnetic field.
		Inductors are used with capacitors in various wireless communications applications.
		Large inductors are used in the power supplies of electronic equipment of all types, including computers and their peripherals.
	whatis.techtarget.com /definition/0,,sid9_gci212339,00.html (398 words)

	AC inductor circuits : REACTANCE AND IMPEDANCE -- INDUCTIVE (Site not responding. Last check: )
		It means that the inductor is releasing power back to the circuit, while a positive power means that it is absorbing power from the circuit.
		What this means in a practical sense is that the reactance of an inductor dissipates a net energy of zero, quite unlike the resistance of a resistor, which dissipates energy in the form of heat.
		An inductor's opposition to change in current translates to an opposition to alternating current in general, which is by definition always changing in instantaneous magnitude and direction.
	www.allaboutcircuits.com /vol_2/chpt_3/2.html (1415 words)

	Guide to Selecting Inductors for Switching Regulators (Site not responding. Last check: )
		is the voltage across the inductor, di is the ripple current, and dt is the duration for which the voltage is applied.
		Irms is normally specified as the dc current that produces an inductor temperature rise of 40°C. Isat is the peak current that produces a specific roll off in inductance —; specified as a percentage reduction from the open circuit value and can vary from 5% to 50%.
		The two main issues with this area of inductor selection are calculating the core loss and the required de-rating of Irms to keep the temperature rise down to an acceptable level.
	powerelectronics.com /mag/power_guide_selecting_inductors/index.html (2065 words)

	Inductor Supply, Inc -- The Premier Supplier of Inductor Manufacturing
		Inductor Supply, Inc. is a world leader in the design, development and manufacturing of all types of magnetic components for the industry.
		Founded in 1979 as an inductor manufacturing specialist, today Inductor Supply is recognized as a premier supplier of Inductors, Chips, Coils, Chokes, Transformers and related magnetic components.
		We supply thousands of inductors in a wide range of sizes, shapes and inductance, always delivering on time.
	www.inductorsupply.com (0 words)

	inductor - Search Results - MSN Encarta
		Inductors consist of a conducting wire wound into the form of a coil.
		When a current passes through the coil, a magnetic field is set up around it...
		If an antenna is not long enough or is too long for the intended radio frequency, the wave crests will encounter and interfere with one another as...
	encarta.msn.com /inductor.html (156 words)

	Earth Inductor or Delzenne's Circle
		The Earth Inductor is a flip coil used to measure the magnitude and direction of the earth's magnetic field.
		The earth inductor at the right was made by Phillip Harris, and in the Spring of 2000 was at James Kennedy Antiques in Durham, North Carolina.
		The Earth Inductor at the right was made by Gaertner of Chicago, and is in the collection of Denison University in Granville, Ohio.
	physics.kenyon.edu /EarlyApparatus/Electricity/Earth_Inductor_or_Delzennes_Circle/Earth_Inductor_or_Delzennes_Circle.html (634 words)

	The Inductor as a Transmission Line
		The time taken for the energy leaving the inductor to rise to equal the amount entering is dependent on the mismatch between the characteristic impedances and also the time delay involved in traversing the device.
		The single turn inductor is a transmission line with an increase in characteristic impedance followed by a short circuit, discussed in the previous chapter.
		A computer iteration of the two-turn inductor was written by Michael S. Gibson, and the results confirmed that the two-turn inductor had the expected exponential waveform with four times the time constant for the one-turn inductor.
	www.ivorcatt.com /4_6.htm (587 words)

	Inductor coil patent invention
		The inductor coil is formed from a flat plate which is cut into a sine-shaped configuration and then is folded in accordion fashion to create a helical coil.
		The inductor coil comprises a plurality of coil turns extending around a longitudinal coil axis in an approximately helical path which progresses axially along the coil axis.
		A plurality of slots are cut in each of the opposite side edges of the plate conductor so as to form the plate conductor into a plurality of cross segments extending transversely with respect to the plate axis and a plurality of connecting segments extending approximately axially with respect to the plate axis.
	www.freshpatents.com /Inductor-coil-dt20060824ptan20060186980.php (1085 words)

	Inductor suits mediumlow-frequency resonant circuits., Vishay Intertechnology, Inc.
		July 29, 2005 - Model ISC-1008 surface-mount, wirewound, magnetically shielded inductor is rated for operating temperatures of -40 to +85°C. With dimensions of 0.142 x 0.142 x 0.098 in., unit has inductance values from 1.0—1,000 H at 100 kHz with standard tolerance of 20% over range.
		A wide range of inductance ratings is available for the ISC-1008 inductor, with values (at 100 KHz) ranging from 1.0 H to 1000 H. Standard tolerance is 20% over this range, and rated current ranges from 1000 mA to 30 mA.
		The inductor, which features a ferrite construction with a magnetic shield, is rated for an operating temperature range of -40 C to +85 C and is both 100% lead (Pb)-free and RoHS-compliant.
	news.thomasnet.com /fullstory/465768/rss/772 (967 words)

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