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Coils & Inductors

An inductor is a passive electrical device employed in electrical circuits for its property of inductance. An inductor can take many forms.

Inductance (measured in henries) is an effect which results from the magnetic field that forms around a current carrying conductor. Electrical current through the conductor creates a magnetic flux proportional to the current. A change in this current creates a change in magnetic flux that, in turn, generates an electromotive force (emf) that acts to oppose this change in current. Inductance is a measure of the generated emf for a unit change in current. For example, an inductor with an inductance of 1 henry produces an emf of 1 V when the current through the inductor changes at the rate of 1 ampere per second. The inductance of a conductor is increased by coiling the conductor such that the magnetic flux encloses (links) all of the coils (turns). Additionally, the magnetic flux linking these turns can be increased by coiling the conductor around a material with a high permeability.



    Chokes, Filter (182)
    Chokes, Swinging (76)
    Coil Assemblies & Forms (120)
    Coils, AF (101)
    Coils, Air Core (58)
    Coils, Antenna (55)
    Coils, Chip (86)
    Coils, Field (38)
    Coils, Focusing (24)
    Coils, Foil Wound (88)
    Coils, High Frequency High Q (119)
    Coils, Hybrid & Repeater (39)
    Coils, IF (68)
    Coils, Low Frequency High Q (131)
    Coils, Molded (107)
    Coils, pi Winding (53)
    Coils, Relay (58)
    Coils, RF (137)
    Coils, Saturable Reactor (74)
    Coils, Shielded (127)
    Coils, Solenoid (101)
    Coils, Surface Mount (68)
    Coils, Switching, Power (119)
    Coils, Telephone (68)
    Coils, Toroidal (204)
    Coils, Transducer (52)
    Coils, Transformer (208)
    Coils, TV (43)
    Coils, Variable (72)
    Igniters, Electronic & Piezo (17)
    Inductors, Chip (77)
    Inductors, Power (164)
    Inductors, Surface Mount (100)
    Inductors, Switch Mode (127)
    Inductors, Variable (46)
    Reactors, Charging (28)
    Reactors, Filter (57)
    Yokes, CRT Deflectiion (11)
Fix & Prog. Sinewave Oscillators - Frequency Devices

 

Books
The 2006-2011 World Outlook for Manufacturing Electronic Inductors, Coils, and Transformers

The 2006-2011 World Outlook for Manufacturing Electronic Inductors, Coils, and Transformers

Inductors and Transformers For Power Electronics
Alex Van den Bossche and Vencislav Cekov Valchev

Excerpt - page 9: "... Hysteresis Loop Let us suppose a magnetic core with a coil, as shown in Fig. 1.8. At the beginning, the net ..."
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Design and Test of Integrated Inductors for RF Applications
Jaime Aguilera and Roc Berenguer

Excerpt - page 30: "... the inner connection. It produces: - Capacitative coupling among the coils of the inductor. - Electric field passing through the oxide and the substrate ..."
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Transformer and Inductor Design Handbook, Third Edition (Electrical and Computer Engineering)
Colonel Wm. T. McLyman

Excerpt - page 47: "... it becomes obsolete. In these power systems there are switching inductors, smoothing choke coils, common mode filters, input filters, output filters, power transformers, current ..."
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The 2006-2011 World Outlook for Electronic Coils, Transformers, and Other Inductors

The 2006-2011 World Outlook for Electronic Coils, Transformers, and Other Inductors

Magnetic Core Selection for Transformers and Inductors (Electrical and Computer Engineering)
Colonel Wm. T. McLyman

Excerpt - page 11: "... 403 590 Laminations 366 534 C Cores 322 468 Single Coil 395 569 Tape Toroids 250 365 INDUCTOR DESIGN The Design Problem Generally The designer is faced with ..."
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High Reliability Magnetic Devices (Electrical Engineering & Electronics, 115)
Colonel Wm. T. McLyman

Excerpt - page 55: "... In-process Inspection 5-17 Traveler-Transformers, Inductors and Coil Assemblies (Front) Assembly No. Program Drawing No. & Rev. Machine ..."
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Sound Reinforcement Handbook
Gary D. Davis and Ralph Jones

Excerpt - page 248: "... the nature of the electronic circuitry in early equalizers. The coils (inductors) were either fixed in value or very difficult to alter. ..."
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Electronic Gadgets for the Evil Genius : 28 Build-It-Yourself
Robert E. Iannini and Robert Iannini

Excerpt - page 62: "... can crusher Note the inclusion of the trigger pulse blocking inductor in one of the coil leads. This part provides reliable triggering when using low- impedance ..."
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The Science and Engineering of Microelectronic Fabrication
Stephen A. Campbell

Excerpt - page 484: "... such unique structures as air bridges, through hole vias, and coil inductors. MODFETs make use of advanced growth processes to improve device ..."
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Antenna Theory: Analysis and Design, 3rd Edition
Constantine A. Balanis

Excerpt - page 218: "... LINEAR WIRE ANTENNAS REFERENCES 1. W. A. Wheeler, "The Spherical Coil as an Inductor, Shield, or Antenna," Proc. IRE, Vol. 46, pp. 1595-1602, September ..."
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Beginner's Guide to Reading Schematics
Robert J. Traister and Anna L. Lisk

Excerpt - page 32: "... and is present only when the current is actually changing. Coils or inductors can be tiny or very large, depending upon the inductance ..."
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How to Test Almost Anything Electronic
Delton T. Horn

Excerpt - page 152: "... 152 Oscilloscope tests A coil or an inductor exhibits a do resistance (usually fairly small) and an inductive ..."
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Physics Demystified : A Self-Teaching Guide (Demystified)
Stan Gibilisco

Excerpt - page 377: "... points for specific complex-number impedances. In the real world, all coil inductors have some resistance because no wire is a perfect conductor. ..."
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Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering)
Adel S. Sedra and Kenneth C. Smith

Excerpt - Index: "... concentration profile, 225 Tapered shape, 359, 360, 361, 449 Tapped coil/inductor, 950, 951 td, BJT tumon-delay, 1161 Technologies, chart, 1043 Telecommunications ..."
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Tab Electronics Guide to Understanding Electricity and Electronics
G. Randy Slone

Excerpt - page 89: "... field. As stated previously, if the current flow through a coil (inductor) is varied, the electromagnetic field will move in proportion to ..."
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Magnetic Components for Power Electronics
Alex Goldman

Excerpt - page 116: "... threat of saturation that would allow the current in the coil to build up and overheat ... important in design of filter inductors or choke coils. We shall discuss this application later in ..."
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Guitar Effects Pedals: The Practical Handbook
Dave Hunter

Excerpt - page 40: "... circuit that consists of Just a couple of transistors, a coil inductor, a few resistors, and a capacitor. And of ~~: ..."
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Electrical Engineering 101: Everything You Should Have Learned in School but Probably Didn't
Darren Ashby

Excerpt - page 138: "... the current as you are switching a diode to ground. Coils All sorts of devices have coils or inductors in them that you can send signals to. Let's take ..."
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Foundations of MEMS
Chang Liu

Excerpt - page 306: "... p. 184-192. 19. Zou, J., et al., Development of Three-Dimensional Inductors Using Plastic Deformation Magnetic Assembly ... Using On-Chip High-Q Three- Dimensional Coil Inductor and Micromachined Variable Capacitor. In Technical Digest, IEEE Solid-State ..."
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High-Power Audio Amplifier Construction Manual
G. Randy Slone

Excerpt - Back Matter: "... one channel to another. The opposite of crosstalk. choke A single-coil inductor. class A A type of output stage biased so that ..."
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Problems and Solutions on Electromagnetism (Major American Universities Ph.D. Qualifying Questions and Solutions)
Yung-Kuo Lim

Excerpt - page 219: "... shop for con- structing simple linear electric components such as coils, inductors, capac- itors, and resistors. You have instruments to measure mechanical ..."
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Electronics For Dummies
Gordon McComb and Earl Boysen

Excerpt - page 131: "... in power supply circuits that convert AC voltage to DC. Inductors (L) Inductors are coils of wire that you often see used in radio frequency ..."
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CMOS Circuit Design for RF Sensors (The International Series in Engineering and Computer Science)
Gunnar Gudnason and Erik Bruun

Excerpt - page 77: "... 1 MHz and actually had the receiver antenna (the secondary inductor/coil) in- tegrated in metal on the chip itself. This is ..."
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Scanners And Secret Frequencies (Electronic Underground S.)
Henry Eisenson

Excerpt - page 6: "... by rotating a variable capacitor wired in conjunction with a coil, or inductor. The combination "resonated" at some frequency, used by the rest ..."
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The Audiophile's Project Sourcebook: 80 High-Performance Audio Electronics Projects
G. Randy Slone

Excerpt - page 293: "... one channel to another. The opposite of cros.stalk. choke A single-coil inductor. Ciss Gate-to-source capacitance with input short-circuited in a common source ..."
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Complete Wireless Design
Cotter W. Sayre

Excerpt - Back Matter: "... in the PA, and with less power back-off required. Loading coils An inductor will electrically increase the length of an antenna to make ..."
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RV Electrical Systems: A Basic Guide to Troubleshooting, Repairing and Improvement
Bill Moeller and Jan Moeller

Excerpt - page 7: "... around a single wire, but forming the wire into a coil increases the strength of the ... Such a coil is an inductor, and the magnetic field surrounding it has a property that ..."
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Secrets Of Surveillance: A Professional's Guide To Tailing Subjects By Vehicle, Foot, Airplane, And Public Transportation
ACM IV Security Services

Excerpt - page 37: "... body communications with earpieces, this risk can be negated. A coil induction system can be installed within the interior roof insulation liner. This consists of a loop coil inductor that is wired to the communications converter. Any incoming radio ..."
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Electromagnetics Explained: A Handbook for Wireless/ RF, EMC, and High-Speed Electronics, Part of the EDN Series for Design Engineers (EDN Series for Design Engineers)
Ron Schmitt

Excerpt - page 257: "... same product. It is probably fairly obvious that components containing coils (inductors, transformers, motors) are predominated by inductance and therefore give rise ..."
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National Electrical Code 2002 Handbook (National Fire Protection Association//National Electrical Code Handbook)
NFPA

Excerpt - page 903: "... parallel (current fed) or in series (voltage fed) with the coil. Because the output capacitance and ... is generated by a coil (inductor) around or adjacent to the workpiece to be heated. The ..."
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Teach Yourself Electricity and Electronics
Stan Gibilisco

Excerpt - page 185: "... is a function of the number of turns in the coil, the diameter of the coil, ... is connected across a wire-coil inductor (or any kind of inductor), it takes a while for ..."
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Practical Antenna Handbook
Joseph J. Carr

Excerpt - page 486: "... Short antennas exhibit capacitive reactance, so we add a loading coil (inductor L in Fig. 25-4) to the radiator to make up ..."
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Fundamentals of Tool Design, Fifth Edition
David Spitler, Society of Manufacturing Engineers, Jeff Lantrip, and John G. Nee

Excerpt - page 330: "... use of an internal induction -heating coil. If the external coil is used, the fixture designer must provide some method of moving the fixture or coil while workpieces are loaded and unloaded. Induction coils (inductors) provide a convenient and precise way of quickly and efficiently ..."
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