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Although induced currents can be harmful, they can also be helpful. Electrical distribution line engineers use inductive coupling to tap power for cameras on towers and at substations that allow remote monitoring of the facilities. Using this they can watch from anywhere and not need to worry about
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in parallel with a high-voltage power line, the power line can induce current on the pipe. Since the pipe is a conductor, insulated by its protective coating from the earth, it acts as a secondary winding for a long, drawn out transformer whose primary winding is the power line. Voltages induced on
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239:. When brought within the oscillating magnetic field of a reader unit, the transceiver is powered up by energy inductively coupled into its antenna and transfers data back to the reader unit inductively.
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200:, or may be separated. Coupling may be intentional or unintentional. Unintentional inductive coupling can cause signals from one circuit to be induced into a nearby circuit, this is called
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Reducing low-frequency magnetic fields may be necessary when dealing with electronics, as sensitive circuits in close proximity to an instrument with a power transformer may pickup the
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is also an effective way of reducing unwanted inductive coupling, though moving the source of the magnetic field away from sensitive electronics is the simplest solution if possible.
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Example of inductive coupling, 1910. The bottom coil is connected to AC power. The alternating magnetic field through the top coil induces current in it which lights the lamp.
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in the coils, which increases the magnetic flux. The two coils may be physically contained in a single unit, as in the primary and secondary windings of a
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and placing them close together on a common axis, so the magnetic field of one coil passes through the other coil. Coupling can also be increased by a
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Low-frequency induction can be a dangerous form of inductive coupling when it happens inadvertently. For example, if a long-distance metal
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the pipe are then a hazard to people operating valves or otherwise touching metal parts of the metal pipeline.
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Inductive coupling is widely used throughout electrical technology; examples include:
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Antenna transformer inductively couples antenna of AM radio station to transmitter
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when they are configured in a way such that change in current through one wire
556:"Could Magnetic Gears Make Wind Turbines Say Goodbye to Mechanical Gearboxes?"
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can also be used to mechanically transfer power without contact, as in the
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The coupling between two wires can be increased by winding them into
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transfers power from one winding to the other by inductive coupling
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573:. Press Syndicate of the University of Caimbridge. p. 456.
153:. A changing current through the first wire creates a changing
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of truck produces high spark plug voltage by inductive coupling
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changing camera batteries or solar panel maintenance.
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chip connected to a large coil that functions as an
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a voltage across the ends of the other wire through
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395:from radio allows inductive coupling to be varied
441:accelerates a projectile by inductive coupling
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16:Electrical circuit coupling using induction
471:boiling water by inductive coupling to pan
161:. The changing magnetic field induces an
109:Learn how and when to remove this message
380:cutaway shows inductively coupled coils
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569:Horowitz, Paul; Hill, Winfield (1989).
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365:measuring current by inductive coupling
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571:The Art of Electronics Second Edition
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47:adding citations to reliable sources
558:. machinedesign.com. 19 June 2014.
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606:Electromagnetic compatibility
532:Handbook of filter synthesis
206:electromagnetic interference
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323:Uses of inductive coupling
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171:Faraday's law of induction
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611:Wireless energy transfer
477:Low-frequency induction
304:Wireless power transfer
227:An inductively coupled
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530:Zverev, A.I. (2005) .
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192:material like iron or
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485:is installed along a
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219:, Le1 and Le2 is the
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217:coupling coefficient
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378:Utility transformer
316:Presence of voltage
204:, and is a form of
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507:Magnetic shielding
272:Inductive charging
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99:December 2009
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41:Please help
36:verification
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336:transformer
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595:Categories
580:0521370957
517:References
437:Prototype
393:Variometer
267:generators
202:cross-talk
135:conductors
69:newspapers
534:. Wiley.
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215:k is the
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334:Power
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90:JSTOR
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