452:
810:
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38:
170:
632:
1526:
Drum armatures and commutators (theory and practice) : a complete treatise on the theory and construction of drum winding, and of commutators for closed-coil armatures, together with a full résumé of some of the principal points involved in their design; and an exposition of armature reactions
173:
In a coil of multiple turns of wire the magnetic field of the turns adds in the center of the coil, creating a strong field. This drawing shows a cross section through the center of the coil. The crosses are wires in which current is moving into the page; the dots are wires in which current is
732:
will add, but if equal currents in opposite directions pass through the windings the opposite fluxes will cancel, resulting in zero flux in the core. So no voltage will be induced in a third winding on the core. These are used in instruments and in devices like
132:. The advantage of using the coil shape is that it increases the strength of the magnetic field produced by a given current. The magnetic fields generated by the separate turns of wire all pass through the center of the coil and add (
801:, the "field" winding of the rotor is energized by the slow relative motion between the rotating winding and the rotating magnetic field produced by the stator winding, which induces the necessary exciting current in the rotor.
215:
made of plastic or other material to hold it in place. The ends of the wire are brought out and attached to an external circuit. Windings may have additional electrical connections along their length; these are called
792:
have one or more windings which interact with moving magnetic fields to convert electrical energy to mechanical energy. Often a machine will have one winding through which passes most of the power of the machine (the
235:. A time-varying current through one winding will create a time-varying magnetic field that passes through the other winding, which will induce a time-varying voltage in the other windings. This is called a
797:), and a second winding which provides the magnetic field of the rotating element ( the "field winding") which may be connected by brushes or slip rings to an external source of electric current. In an
271:
in the center to increase the magnetic field. The current through the coil magnetizes the iron, and the field of the magnetized material adds to the field produced by the wire. This is called a
586:- an adjustable inductor consisting of two coils in series, an outer stationary coil and a second one inside it which can be rotated so their magnetic axes are in the same direction or opposed.
555:
or reactors are coils which generate a magnetic field which interacts with the coil itself, to induce a back EMF which opposes changes in current through the coil. Inductors are used as
184:
227:
Coils can have more than one winding, insulated electrically from each other. When there are two or more windings around a common magnetic axis, the windings are said to be
495:
winding - an iron-core coil which is acted on by the magnetic field of the field winding to either create torque (motor) or induce a voltage to produce power (generator)
645:
A transformer is a device with two or more magnetically coupled windings (or sections of a single winding). A time varying current in one coil (called the
676:- a transformer with only one winding. Different portions of the winding, accessed with taps, act as primary and secondary windings of the transformer.
597:
535:
physically transfer to a voice coil immersed in a magnetic field, and the coil's terminal ends then provide an electric analog of those vibrations.
351:. This includes coils wound on plastic or other nonmagnetic forms, as well as coils which actually have empty air space inside their windings.
113:
imaging machines. Either an electric current is passed through the wire of the coil to generate a magnetic field, or conversely, an external
606:- an iron-core inductor used to control AC power by varying the saturation of the core using a DC control voltage in an auxiliary winding.
1853:
1597:
483:
of electric motors and generators which act on each other to either turn the shaft (motor) or generate an electric current (generator)
696:- an early transformer which uses a vibrating interrupter mechanism to break the primary current so it can operate off of DC current.
148:. The induced voltage can be increased by winding the wire into a coil because the field lines intersect the circuit multiple times.
463:
for some external use, often to exert a mechanical force on something. or remove existing background fields. A few specific types:
527:
is passed through the coil, it vibrates, moving the attached speaker cone to create sound waves. The reverse is used in a dynamic
1564:
1519:
Coil winding; a description of coil winding procedures, winding machines and associated equipment for the electronic industry
211:
such as plastic or enamel to prevent the current from passing between the wire turns. The winding is often wrapped around a
728:- a coil wound with two parallel, closely spaced strands. If AC currents are passed through it in the same direction, the
580:- an inductor used to add inductance to an antenna, to make it resonant, or to a cable to prevent distortion of signals.
1291:
1132:
1045:
1011:
979:
163:
pass through the coil. The end of a magnetic core from which the field lines emerge is defined to be the North pole.
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These are coils used to translate time-varying magnetic fields to electric signals, and vice versa. A few types:
686:. This is a commonly used shape as it decreases the leakage flux, resulting in less electromagnetic interference.
583:
2241:
1982:
1767:
145:
17:
2115:
327:
1281:
1001:
2125:
1838:
1811:
2135:
2130:
1583:
719:
703:
155:. If the fingers of the right hand are wrapped around the magnetic core of a coil in the direction of
110:
2210:
1828:
1806:
884:
339:
coil. This has lower magnetic field and inductance than a closed core, but is often used to prevent
129:
49:
of a current-carrying loop of wire pass through the center of the loop, concentrating the field there
851:. Conversely it is also used to read the data in the form of changing magnetic fields in the medium.
207:. In windings in which the turns touch, the wire must be insulated with a coating of nonconductive
2079:
1933:
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659:
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31:
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in electrical circuits, to temporarily store energy or resist changes in current. A few types:
78:
1407:
1341:
1308:
1248:
1215:
1149:
1089:
592:- Although called a transformer, this is actually an inductor which serves to store energy in
303:
A coil with a core which forms a closed loop, possibly with some narrow air gaps, is called a
128:
A current through any conductor creates a circular magnetic field around the conductor due to
2074:
1938:
1676:
1656:
1636:
1374:
1182:
1035:
969:
532:
208:
574:- an inductor used to block high frequency AC while allowing through low frequency AC or DC.
322:
or doughnut, with either a circular or rectangular cross section. This geometry has minimum
307:
coil. By providing a closed path for the magnetic field lines, this geometry minimizes the
239:. The winding to which current is applied, which creates the magnetic field, is called the
2069:
1962:
1686:
1462:
679:
489:- an iron-core coil which generates a steady magnetic field to act on the armature winding.
156:
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8:
2175:
1878:
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589:
571:
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340:
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118:
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918:
that uses a coil to translate vibration of a needle to an audio signal in playing vinyl
2200:
2094:
2049:
1987:
1957:
1911:
1734:
1721:
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911:
827:
Sensor or pickup coils - these are used to detect external time-varying magnetic fields
789:
748:
613:
609:
94:
1553:
283:
of a coil by hundreds or thousands of times over what it would be without the core. A
2160:
2064:
1992:
1784:
1772:
1762:
1556:
Online calculator for determining the inductance of single-layer and multilayer coils
1500:
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1095:
1068:
1041:
1007:
975:
919:
862:
854:
766:
740:
737:. They are also used in low inductance wirewound resistors for use at RF frequencies.
650:
603:
247:
2110:
1561:
1441:"Bespoke magnetic field design for a magnetically shielded cold atom interferometer"
2215:
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2145:
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2007:
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840:
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649:) generates a magnetic field which induces a voltage in the other coil (called the
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There are many different types of coils used in electric and electronic equipment.
82:
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2002:
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137:
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A coil with a core which is a straight bar or other non-loop shape is called an
151:
The direction of the magnetic field produced by a coil can be determined by the
2185:
2084:
2054:
1916:
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1816:
1744:
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1624:
1474:
836:
814:
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377:
144:
external magnetic flux induces a voltage in a conductor such as a wire, due to
90:
86:
432:
2235:
2195:
1863:
915:
896:
878:
844:
729:
699:
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566:
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311:
and produces the strongest magnetic field. It is often used in transformers.
292:
264:
260:
102:
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1843:
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906:
888:
868:
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37:
408:
coils, inductors or transformers operate with alternating currents in the
66:
1997:
1928:
948:
754:
640:
520:
236:
220:. A winding that has a single tap in the center of its length is called
169:
106:
1888:
1858:
1729:
1691:
707:
667:
528:
516:
510:
436:
280:
2170:
1923:
1701:
848:
839:- a coil which is used to create a magnetic field to write data to a
758:
360:
296:
1575:
928:
There are also types of coil which don't fit into these categories.
1952:
1796:
1752:
1457:
631:
552:
547:
469:
98:
2028:
2023:
833:- a coil which senses when a magnet or iron object passes near it
507:- air-core coils which serve to cancel an external magnetic field
472:- an electromagnet in the form of a straight hollow helix of wire
122:
1706:
1630:
1529:". London, "The Electrician" Printing and Publishing Co., 1893.
683:
480:
475:
Motor and generator windings - iron core electromagnets on the
440:
191:
The wire or conductor which constitutes the coil is called the
183:
70:
715:
319:
117:
magnetic field through the interior of the coil generates an
74:
279:. A ferromagnetic core can increase the magnetic field and
159:
through the wire, the thumb will point in the direction the
268:
62:
757:- a specialized audio transformer with 3 windings used in
531:, where sound vibrations intercepted by something like a
140:
of wire, the stronger the field produced. Conversely, a
1854:
Dual-rotor permanent magnet induction motor (DRPMIM)
1040:. Alpha Sciences International Ltd. pp. 73–77.
666:
which transforms the high voltage from the electric
523:, suspended between the poles of a magnet. When the
195:. The hole in the center of the coil is called the
136:) to produce a strong field there. The greater the
1094:. Jones & Bartlett Learning, LLC. p. 273.
1405:
1376:Comprehensive Dictionary of Electrical Engineering
1343:Comprehensive Dictionary of Electrical Engineering
1310:Comprehensive Dictionary of Electrical Engineering
1283:Comprehensive Dictionary of Electrical Engineering
1246:
1213:
1187:. Jones & Bartlett Learning, LLC. p. 29.
1151:Comprehensive Dictionary of Electrical Engineering
1003:Comprehensive Dictionary of Electrical Engineering
363:of the current they are designed to operate with:
347:A coil without a ferromagnetic core is called an
2233:
881:- a toroidal coil used as an AC measuring device
857:- an AC coil used to heat an object by inducing
455:Canon AF-10 Date old camera shutter driver coil.
1521:" (2d ed.). Chicago, G. Stevens Mfg. Co., 1958.
670:to the lower voltage used by utility customers.
1372:
1339:
1306:
1180:
1147:
1120:
1087:
875:, to convert radio waves to electric currents.
706:to create a pulse of high voltage to fire the
390:coils, inductors or transformers operate with
376:coils or electromagnets operate with a steady
30:"Winding" redirects here. For other uses, see
1591:
187:Diagram of typical transformer configurations
1184:NFPA's Pocket Dictionary of Electrical Terms
1091:NFPA's Pocket Dictionary of Electrical Terms
971:NFPA's Pocket Dictionary of Electrical Terms
295:ceramic compound. Ferrite coils have lower
1346:. Springer Berlin Heidelberg. p. 243.
1313:. Springer Berlin Heidelberg. p. 346.
1154:. Springer Berlin Heidelberg. p. 633.
418:Coils can be classified by their function:
318:coil, in which the core has the shape of a
1598:
1584:
1536:". International Coil Winding Association.
1379:. Springer Berlin Heidelberg. p. 19.
995:
993:
991:
1482:
1456:
1273:
1061:Amos, S. W.; Amos, Roger (4 March 2002).
459:Electromagnets are coils that generate a
314:A common form for closed-core coils is a
287:is a variety of coil with a core made of
1399:
1279:
1060:
999:
967:
808:
630:
620:, to limit the current through the lamp.
450:
431:
182:
168:
36:
1543:". Braintree, R. H. Chandler Ltd, 1977.
1366:
1333:
1300:
1240:
988:
961:
596:and horizontal deflection circuits for
513:coil - a coil used to demagnetize parts
14:
2234:
1438:
1207:
1174:
1141:
1081:
1029:
1027:
1025:
1023:
974:. Jones and Hymel Tucker. p. 36.
77:). Electromagnetic coils are used in
1605:
1579:
931:
1033:
887:- a coil used to produce the output
776:
178:
1439:Hobson, P. J.; et al. (2022).
1114:
1020:
804:
109:, sensor coils such as in medical
24:
1511:
565:Tank coil - an inductor used in a
259:Many electromagnetic coils have a
203:. Each loop of wire is called a
25:
2253:
1547:
1412:. Elsevier Science. p. 113.
1253:. Elsevier Science. p. 326.
1220:. Elsevier Science. p. 167.
710:which initiates the fuel burning.
421:
354:
1409:Newnes Dictionary of Electronics
1250:Newnes Dictionary of Electronics
1217:Newnes Dictionary of Electronics
1124:Newnes Dictionary of Electronics
718:- a transformer which matches a
682:- the core is in the shape of a
254:
245:. The other windings are called
1572:". Surrey.ac.uk, 2005 October 9
1432:
626:
519:- a coil used in a moving-coil
359:Coils can be classified by the
1983:Timeline of the electric motor
1121:Amos, S W; Roger Amos (2002).
1054:
1006:. Springer. pp. 114–115.
13:
1:
1768:Dahlander pole changing motor
1406:Amos, S.W.; Amos, R. (2002).
1280:Laplante, Phillip A. (1998).
1247:Amos, S.W.; Amos, R. (2002).
1214:Amos, S.W.; Amos, R. (2002).
1000:Laplante, Phillip A. (1999).
954:
912:Magnetic phonograph cartridge
1541:Coil coating review, 1970–76
968:Stauffer, H. Brooke (2002).
761:circuits to convert between
702:- an induction coil used in
541:
328:electromagnetic interference
7:
1812:Brushless DC electric motor
942:
871:- a coil which serves as a
704:internal combustion engines
10:
2258:
1562:Producing wound components
1554:Coil Inductance Calculator
1475:10.1038/s41598-022-13979-4
935:
905:- a sensor coil used in a
743:- A transformer used with
720:balanced transmission line
638:
545:
425:
146:Faraday's law of induction
29:
2103:
2042:
2016:
1971:
1902:
1829:Switched reluctance (SRM)
1807:Brushed DC electric motor
1743:
1720:
1645:
1613:
1286:. Springer. p. 143.
885:Musical instrument pickup
735:Ground Fault Interrupters
41:The magnetic field lines
2017:Experimental, futuristic
1934:Variable-frequency drive
1534:Coil winding proceedings
861:in it, a process called
660:Distribution transformer
600:televisions and monitors
594:switching power supplies
81:, in applications where
32:Winding (disambiguation)
2034:Superconducting machine
1672:Coil winding technology
1373:Laplante, P.A. (1999).
1340:Laplante, P.A. (1999).
1307:Laplante, P.A. (1999).
1181:Stauffer, H.B. (2005).
1148:Laplante, P.A. (1999).
1127:. Newnes. p. 191.
1088:Stauffer, H.B. (2005).
938:Coil winding technology
398:range, less than 20 kHz
174:emerging from the page.
1524:Weymouth, F. Marten, "
855:Induction heating coil
818:
662:- A transformer in an
636:
612:- an inductor used in
456:
448:
188:
175:
79:electrical engineering
50:
2242:Electromagnetic coils
2075:Power-to-weight ratio
1939:Direct torque control
1517:Querfurth, William, "
813:The sensor coil of a
812:
722:to an unbalanced one.
634:
454:
439:electromagnet on the
435:
326:and radiates minimum
299:at high frequencies.
186:
172:
89:, in devices such as
40:
2070:Open-loop controller
1963:Ward Leonard control
1687:DC injection braking
747:. They are used for
680:Toroidal transformer
392:alternating currents
233:magnetically coupled
161:magnetic field lines
157:conventional current
153:right hand grip rule
125:) in the conductor.
55:electromagnetic coil
27:Electrical component
1973:History, education,
1619:Alternating current
1467:2022NatSR..1210520H
1064:Newnes 2002, p. 129
664:electric power grid
590:Flyback transformer
412:range, above 20 kHz
341:magnetic saturation
309:magnetic reluctance
229:inductively coupled
2136:Dolivo-Dobrovolsky
2095:Voltage controller
2050:Blocked-rotor test
1988:Ball bearing motor
1958:Motor soft starter
1912:AC-to-AC converter
1773:Wound-rotor (WRIM)
1735:Electric generator
1567:2007-07-07 at the
1539:Chandler, R. H., "
932:Winding technology
920:phonograph records
819:
767:four-wire circuits
749:impedance matching
637:
616:circuits, such as
614:gas-discharge lamp
457:
449:
273:ferromagnetic-core
248:secondary windings
189:
176:
65:in the shape of a
51:
2229:
2228:
2065:Open-circuit test
1904:Motor controllers
1785:Synchronous motor
1607:Electric machines
1034:Arun, P. (2006).
863:induction heating
782:Electric machines
777:Electric machines
741:Audio transformer
651:secondary winding
618:fluorescent lamps
610:Inductive ballast
604:Saturable reactor
380:in their windings
285:ferrite core coil
179:Windings and taps
83:electric currents
57:is an electrical
16:(Redirected from
2249:
2080:Two-phase system
2060:Electromagnetism
2008:Mouse mill motor
1975:recreational use
1849:Permanent magnet
1778:Linear induction
1631:Permanent magnet
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1017:
997:
986:
985:
965:
914:- a sensor in a
843:medium, such as
841:magnetic storage
831:Inductive sensor
805:Transducer coils
653:). A few types:
557:circuit elements
46:
21:
2257:
2256:
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2250:
2248:
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2246:
2232:
2231:
2230:
2225:
2099:
2038:
2012:
2003:Mendocino motor
1976:
1974:
1967:
1898:
1758:Induction motor
1739:
1716:
1662:Braking chopper
1650:
1648:
1641:
1609:
1604:
1569:Wayback Machine
1550:
1514:
1512:Further reading
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1021:
1014:
998:
989:
982:
966:
962:
957:
945:
940:
934:
893:electric guitar
807:
799:induction motor
779:
730:magnetic fluxes
674:Autotransformer
647:primary winding
643:
629:
550:
544:
445:universal motor
430:
424:
410:radio frequency
402:Radio-frequency
396:audio frequency
384:Audio-frequency
357:
257:
242:primary winding
181:
138:number of turns
91:electric motors
87:magnetic fields
44:
35:
28:
23:
22:
15:
12:
11:
5:
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2085:Inchworm motor
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2055:Circle diagram
2052:
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2043:Related topics
2040:
2039:
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2031:
2026:
2020:
2018:
2014:
2013:
2011:
2010:
2005:
2000:
1995:
1993:Barlow's wheel
1990:
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1979:
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1955:
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1944:Vector control
1941:
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1917:Cycloconverter
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1647:Components and
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370:Direct current
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355:Types of coils
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267:material like
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18:Magnetic coil
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1527:and sparking
1525:
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1451:(1): 10520.
1448:
1444:
1434:
1423:. Retrieved
1408:
1401:
1390:. Retrieved
1375:
1368:
1357:. Retrieved
1342:
1335:
1324:. Retrieved
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1264:. Retrieved
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1090:
1083:
1067:. Elsevier.
1063:
1056:
1036:
1002:
970:
963:
927:
907:magnetometer
889:audio signal
869:Loop antenna
820:
780:
726:Bifilar coil
644:
627:Transformers
578:Loading coil
551:
525:audio signal
505:Maxwell coil
458:
417:
405:
401:
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343:of the core.
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324:leakage flux
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130:Ampere's law
127:
115:time-varying
114:
107:transformers
54:
52:
42:
1998:Lynch motor
1763:Shaded-pole
1649:accessories
1037:Electronics
949:Hanna curve
755:Hybrid coil
641:Transformer
635:Transformer
521:loudspeaker
305:closed-core
297:core losses
237:transformer
1894:Axial flux
1884:Ultrasonic
1859:Servomotor
1839:Doubly fed
1834:Reluctance
1730:Alternator
1722:Generators
1692:Field coil
1677:Commutator
1637:commutated
1635:SC - Self-
1458:2110.04498
1425:2017-01-07
1392:2017-01-07
1359:2017-01-07
1326:2017-01-07
1266:2017-01-07
1233:2017-01-07
1200:2017-01-07
1167:2017-01-07
1107:2017-01-07
955:References
795:"armature"
790:generators
708:spark plug
668:power line
584:Variometer
529:microphone
517:Voice coil
511:Degaussing
437:Field coil
281:inductance
209:insulation
95:generators
61:such as a
2211:Steinmetz
2126:Davenport
1924:Amplidyne
1824:Universal
1802:Homopolar
1790:Repulsion
1702:Slip ring
1501:238583775
903:Flux gate
849:hard disk
759:telephony
553:Inductors
542:Inductors
533:diaphragm
443:of an AC
361:frequency
337:open-core
213:coil form
134:superpose
99:inductors
59:conductor
2236:Category
2216:Sturgeon
2146:Ferraris
2131:Davidson
1953:Metadyne
1869:Traction
1817:Unipolar
1797:DC motor
1753:AC motor
1657:Armature
1565:Archived
1493:35732872
1445:Sci. Rep
943:See also
784:such as
763:two-wire
548:Inductor
493:Armature
470:Solenoid
199:area or
142:changing
2206:Sprague
2201:Siemens
2176:Maxwell
2141:Faraday
2090:Starter
2029:Railgun
2024:Coilgun
1864:Stepper
1712:Winding
1484:9217970
1463:Bibcode
847:, or a
394:in the
289:ferrite
193:winding
123:voltage
2196:Saxton
2181:Ørsted
2166:Jedlik
2161:Jacobi
2151:Gramme
2116:Barlow
2104:People
1929:Drives
1844:Linear
1745:Motors
1707:Stator
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978:
891:in an
786:motors
684:toroid
481:stator
441:stator
330:(EMI).
71:spiral
2221:Tesla
2191:Pixii
2156:Henry
2121:Botto
2111:Arago
1697:Rotor
1667:Brush
1629:PM -
1623:DC -
1617:AC -
1497:S2CID
1453:arXiv
716:Balun
572:Choke
477:rotor
320:torus
75:helix
45:green
2186:Park
2171:Lenz
1889:TEFC
1489:PMID
1414:ISBN
1381:ISBN
1348:ISBN
1315:ISBN
1288:ISBN
1255:ISBN
1222:ISBN
1189:ISBN
1156:ISBN
1129:ISBN
1096:ISBN
1069:ISBN
1042:ISBN
1008:ISBN
976:ISBN
788:and
765:and
291:, a
269:iron
218:taps
205:turn
197:core
67:coil
63:wire
1479:PMC
1471:doi
895:or
692:or
598:CRT
479:or
404:or
386:or
372:or
275:or
231:or
119:EMF
111:MRI
73:or
53:An
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1022:^
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751:.
503:,
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406:RF
388:AF
374:DC
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69:(
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20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
