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Loops of electric current induced within conductors by a changing magnetic field
In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field
Eddy_current
Device used to slow or stop a moving object by generating eddy currents
An eddy current brake, also known as an induction brake, Faraday brake, electric brake or electric retarder, is a device used to slow or stop a moving
Eddy_current_brake
Australian musical group
Eddy Current Suppression Ring (often abbreviated as ECSR) are an Australian garage rock band originating from Melbourne. Formed in 2003, the band consists
Eddy_Current_Suppression_Ring
Electromagnetic method of non-destructive testing of conductive materials
Eddy-current testing (also commonly seen as eddy current testing and ECT) is one of many electromagnetic testing methods used in nondestructive testing
Eddy-current_testing
Type of displacement sensor
Eddy current sensors are displacement sensors that use the principle of eddy current formation to sense displacement. These sensors measure shaft displacement
Eddy-current_sensor
Machine that separates non-ferrous metals from an input stream
An eddy current separator (ECS) is a machine that uses a powerful magnetic field to separate non-ferrous metals from an input waste or ore stream. The
Eddy_current_separator
Topics referred to by the same term
and Scottish families Eddy (given name), male given name Eddy (fluid dynamics), the swirling of a fluid and the reverse current created when the fluid
Eddy
Production of voltage by a varying magnetic field
magnetic field, will have circular currents induced within them by induction, called eddy currents. Eddy currents flow in closed loops in planes perpendicular
Electromagnetic_induction
Sweep frequency eddy current testing (SFECT) is a type of eddy current testing technique, where the probes are operated around its resonance frequency
Sweep frequency eddy current testing
Sweep_frequency_eddy_current_testing
Eddy Current is a twelve issues comic-book series created in 1987 by Ted McKeever and published by Mad Dog Graphics. This and Transit were later tied into
Eddy_Current_(comics)
Damper that resists motion via viscous friction
common viscous damper, the eddy current damper produces a resistive force proportional to velocity. A common use of the eddy current damper is in balance scales
Dashpot
Process of heating an electrically conducting object by electromagnetic induction
generating electric currents inside the conductor called eddy currents. The eddy currents flow through the resistance of the material, and heat it by
Induction_heating
Object used to guide and confine magnetic fields
account. In alternating current (AC) devices they cause energy losses, called core losses, due to hysteresis and eddy currents in applications such as
Magnetic_core
Machine used to measure force or mechanical power
manually controlled or determined by a computer. Most systems employ eddy current, oil hydraulic, or DC motor produced loads because of their linear and
Dynamometer
Device to couple energy between circuits
magnetizing current losses, consisting of Hysteresis losses due to nonlinear magnetic effects in the transformer core, and Eddy current losses due to
Transformer
Magnetically induced effect in AC conductors
adjacent to the nearby conductor. The proximity effect is caused by eddy currents induced within a conductor by the time-varying magnetic field of the
Proximity effect (electromagnetism)
Proximity_effect_(electromagnetism)
Electric current that periodically reverses direction
1885. In early 1885, the three engineers also eliminated the problem of eddy current losses with the invention of the lamination of electromagnetic cores
Alternating_current
Piece of machine equipment
(which is a function of field current), either armature voltage or field current can be used to control speed. An eddy-current drive (sometimes called a "Dynamatic
Motor_drive
Modern form of roller coaster
Adventure, was capable of reaching 128 mph (206 km/h) in 3.5 seconds. The current second and former fastest roller coaster in the world, Formula Rossa, reaches
Launched_roller_coaster
Component of railway rolling stock
electric generator, thus slowing the train. An eddy current brake slows or stops a train by generating eddy currents and thus dissipating its kinetic energy
Railway_brake
Dimensionless quantity in magnetohydrodynamics
\mathrm {R} _{\mathrm {m} }<1} the skin effect is negligible and the eddy current braking torque follows the theoretical curve of an induction motor. For
Magnetic_Reynolds_number
Suspension of objects by magnetic force
mechanical damping (in the support), such as dashpots, air drag, etc. eddy current damping (conductive metal influenced by field) tuned mass dampers in
Magnetic_levitation
Speed gauge in motor vehicles
inventor Otto Schultze patented his version (which, like Belušić's, ran on eddy currents) on 7 October 1902. Many speedometers use a rotating flexible cable
Speedometer
Flow of electric charge
equipment. Eddy currents are electric currents that occur in conductors exposed to changing magnetic fields. Similarly, electric currents occur, particularly
Electric_current
Type of analysis technique
troubleshooting, and research. The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual
Nondestructive_testing
Town in Kerala, India
original on 19 June 2008. Retrieved 18 November 2025. White, Black and. "Eddy Current Controls (India) Limited – India". www.eddyindia.com. Archived from the
Chalakudy
2008 studio album by Eddy Current Suppression Ring
Primary Colours is the second album by Australian garage punk band Eddy Current Suppression Ring. The album was recorded in a suburb of Melbourne over
Primary Colours (Eddy Current Suppression Ring album)
Primary_Colours_(Eddy_Current_Suppression_Ring_album)
Technology and service company
Reno. Don Bently was the first to manufacture a commercially successful eddy-current proximity probe which measured vibration in high-speed turbomachinery
Bently_Nevada
Non-contact high precision sensors
glue sensing. Lion Precision Capacitive Eddy Current Comparison, A comparison between capacitive and eddy current sensing technology from Lion Precision
Capacitive displacement sensor
Capacitive_displacement_sensor
Electromagnetic flow measurement technique
outlet zones). Eddy current in its turn creates induced magnetic field according to Ampère's law. The interaction between eddy currents and total magnetic
Lorentz_force_velocimetry
Swirling and reverse current in a turbulent flow regime
In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. The moving fluid creates
Eddy_(fluid_dynamics)
Unidirectional flow of electric charge
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through
Direct_current
Tendency of AC current flow in a conductor's outer layer
caused by opposing eddy currents induced by the changing magnetic field resulting from the alternating current. The electric current flows mainly at the
Skin_effect
Passive two-terminal electrical component that stores energy in its magnetic field
frequency current is higher than its resistance to direct current because of skin effect. Due to induced eddy currents, radio frequency alternating current does
Inductor
Electronic instrument which detects the presence of metal nearby
alternating current that passes through a coil producing an alternating magnetic field. If a piece of electrically conductive metal is close to the coil, eddy currents
Metal_detector
Electric motor driven by an AC electrical input
super multiple of the supply frequency. Other types of motors include eddy current motors, and AC and DC mechanically commutated machines in which speed
AC_motor
Device for slowing down large vehicles
producing a magnetic field through which the rotor moves. This induces eddy currents in the rotor, which produces an opposing magnetic field to the stator
Retarder (mechanical engineering)
Retarder_(mechanical_engineering)
Electrical resistance of a thin film
a four-point probe measurement) or indirectly by using a non-contact eddy-current-based testing device. Sheet resistance is invariable under scaling of
Sheet_resistance
French physicist (1819–1868)
He also made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope. The son of a publisher,
Léon_Foucault
Magnet that creates a magnetic field through an electric current
field is concentrated there, eddy currents in the core are the major problem. Eddy currents are closed loops of current that flow in planes perpendicular
Electromagnet
Magnetic phenomenon
direction of the circulation of eddy-currents is always such as to tend to oppose the relative motion. The eddy-current in the part receding from the poles
Arago's_rotations
Type of sensor
encoder technologies include optical, magnetic, inductive, capacitive and eddy current. Optical technologies include shadow, self imaging and interferometric
Linear_encoder
Test used in electrical engineering
consisting of the hysteresis loss and the eddy current loss. Although the hysteresis loss is less than the eddy current loss, it is not negligible. The two
Open-circuit_test
Difference in electric potential between two points in space
per 1 coulomb of charge. The old SI definition for volt used power and current; starting in 1990, the Josephson effect was used, and in 2019 physical
Voltage
Ratio of active power to apparent power
presence of current harmonics in a transformer also result in larger eddy currents in the magnetic core of the transformer. Eddy current losses generally
Power_factor
Electromagnetic opposition to change
voltage induced in an inductor or wire loop by a changing current, or the drag force of eddy currents exerted on moving objects in the magnetic field. Lenz's
Lenz's_law
Method of inspection using remotely operated tools
contributes to structural integrity efforts. Main article – Pulsed-eddy current Pulsed-eddy current (PEC) tools use a probe coil to send a pulsed magnetic field
Robotic non-destructive testing
Robotic_non-destructive_testing
Device to slow or stop vehicles
electromagnetic brakes and eddy current brakes use electromagnetic force, but electromagnetic brakes ultimately depend on friction whereas eddy current brakes use magnetic
Electromagnetic_brake
Mechanical belay device
and based on centrifugal force. The electro-magnetic method uses the Eddy current brake principle. It requires a conductive disk that rotates through the
Auto_belay
Amount of charge flowing through a unit cross-sectional area per unit time
current density is the electric current (or the amount of charge per unit time) that flows through a unit area of a chosen cross section. The current
Current_density
Fifth planet from the Sun
second-largest contiguous structure in the Solar System, generated by eddy currents within the fluid, metallic hydrogen core. The solar wind interacts with
Jupiter
Basic law of electromagnetism
change of inertial frame, the two fields transform into one another. Eddy current Inductance Crosstalk Felici's law Sadiku, M. N. O. (2007). Elements of
Faraday's_law_of_induction
Ferrimagnetic ceramic material
useful in applications like magnetic cores for transformers to suppress eddy currents. Ferrites can be divided into two groups based on their magnetic coercivity
Ferrite_(magnet)
Imaging technique
the eddy current effect. It is also called electromagnetic induction tomography, electromagnetic tomography (EMT), eddy current tomography, and eddy current
Magnetic_induction_tomography
Rotating part of the common squirrel-cage induction motor
iron with several times the resistivity of pure iron, further reducing eddy-current loss, and low coercivity to reduce hysteresis loss. The same basic design
Squirrel-cage_rotor
Motor which works on direct current
motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly
DC_motor
defects in steel pipes and tubes. RFT is also referred to as remote field eddy current testing (RFEC or RFET). RFET is sometimes expanded as remote field electromagnetic
Remote_field_testing
Mechanical device that inhibits motion
pressurized air or pressurized oil. Eddy current brakes use magnetic fields to convert kinetic energy into electric current in the brake disc, fin, or rail
Brake
Physical quantity, density of magnetic moment per volume
The magnetization M makes a contribution to the current density J, known as the magnetization current. J m = ∇ × M {\displaystyle \mathbf {J} _{\mathrm
Magnetization
Unit of electrical conductivity
described in ASTM International specification ASTM E 1004 Electromagnetic (Eddy-Current) Measurements of Electrical Conductivity. Electrical conductivity meters
International Annealed Copper Standard
International_Annealed_Copper_Standard
Form of damping involving magnets and electrical conductors
When a magnetic field moves through a conductor the movement induces an eddy current in the conductor. The flow of electrons in the conductor immediately
Magnetic_damping
Equations describing classical electromagnetism
how electric and magnetic fields are generated by electric charges and currents. Together with the Lorentz force law, they form the foundation of classical
Maxwell's_equations
Quality control process in welding
material is placed within this magnetic field, eddy currents are induced within the material. Eddy current instruments measured the inductive reactance
Welding_inspection
Object or material which allows the flow of electric charge with little energy loss
electrons generates electric current, positively charged holes, and positive or negative ions in some cases. In order for current to flow within a closed electrical
Electrical_conductor
Ratio of inertial to viscous forces acting on a liquid
even move counter to the overall direction of the flow (eddy currents). These eddy currents begin to churn the flow, using up energy in the process,
Reynolds_number
Animated television series
Ed, Edd n Eddy is an animated television series created by Danny Antonucci for Cartoon Network. The series revolves around three friends named Ed, Edd
Ed,_Edd_n_Eddy
2018 aviation accident over Pennsylvania
2016, accident in Pensacola, Florida, in which a fan blade fractured, eddy-current inspections were incorporated into the overhaul process requirements
Southwest Airlines Flight 1380
Southwest_Airlines_Flight_1380
Electric train with no locomotive
motors allows for a higher total motor power output Braking, including eddy current, rheostatic and/or regenerative braking, on multiple axles at once, greatly
Electric_multiple_unit
Environmental practice of separating waste categories to make it easy to recycle
Laser-induced breakdown spectroscopy Eddy current separator based sorting Magnetic Separation (Beyond just Eddy Current) Ferrous Metal Separation Uses powerful
Waste_sorting
Mobile equipment that transports people, animals or cargo
vehicle's potential energy. High-speed trains sometimes use frictionless Eddy-current brakes; however, widespread application of the technology has been limited
Vehicle
Welding using electromagnetic induction
heating effect is resistive heating, which is due to induced currents called eddy currents. In a ferromagnetic workpiece, the heating is caused mainly
Induction_welding
Six seat retractable gear single-engine general aviation aircraft
FAA issued an Airworthiness Directive on February 21, 2020 mandating eddy current inspections of the carry-through spar lower cap, corrective action if
Cessna_210_Centurion
position sensors include the following: Capacitive displacement sensor Eddy-current sensor Hall effect sensor Inductive sensor Laser Doppler vibrometer (optical)
Position_sensor
Type of transformer
turns and output voltage and the use of a "divided" iron core to reduce eddy current losses. Michael Faraday discovered the principle of induction, Faraday's
Induction_coil
Type of transducer
The eddy current in the magnetic field experiences Lorentz force. In a microscopic view, the Lorentz force is applied on the electrons in the eddy current
Electromagnetic acoustic transducer
Electromagnetic_acoustic_transducer
Reduction in ductility of a metal exposed to hydrogen
operations of turbo-aggregates. Non-Destructive methods like In situ eddy current and ultrasonic monitoring of hydrogen diffusion is also reported Recent
Hydrogen_embrittlement
Metallurgical process
electric currents to melt metal within a vacuum. The first prototype was developed in 1920. Induction heating induces eddy currents within conductors. Eddy currents
Vacuum_induction_melting
SI derived unit of power
electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one
Watt
American electrical engineer
tone-burst pulses. He also designed a rotating field transceiver probe for eddy current detection, enabling precise defect location. Moreover, he co-holds a
Satish_Udpa
Defunct Australian record label
bands and record labels, including Mikey Young and Brendan Huntley of Eddy Current Suppression Ring, Guy Blackman of Chapter Music, Richard Stanley of Aarght
Corduroy_Records
Technique in chemistry and manufacturing
and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous biological and physical reaction
Electrolysis
Electron flow-powered mechanical device
machines include the Amplidyne, Synchro, Metadyne, Eddy current clutch, Eddy current brake, Eddy current dynamometer, Hysteresis dynamometer, Rotary converter
Electric_machine
Open standard from the medical computer science
radiography, digital radiography, computed tomography, ultrasonic testing, eddy-current testing, and thermographic testing. DICONDE is used worldwide to store
DICOM
Fundamental interaction between charged particles
(clockwise or counter-clockwise) depends on the direction of the current in the wire. A current is induced in a loop of wire when it is moved toward or away
Electromagnetism
Electromagnetic effect in physics
that is transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current. Such potential difference is known
Hall_effect
Adaptive suspension system
ECU turned off the current to when the damper lost its magnetic field. This was caused by a temporary electric current, or eddy current, in the electromagnet
MagneRide
German high speed train model
300 km/h (190 mph). Problems with flying gravel and its frictionless linear eddy current brake came up during testing. In order to limit the creation of tornado-like
ICE_3
Amusement park in Missouri, United States
was closed in 2003 and construction began to modify the ride into the current Powder Keg: A Blast in the Wilderness, which opened in 2005. Rube Dugan's
Silver_Dollar_City
Relationship between relativity and pre-quantum electromagnetism
with a constant velocity through the field of a stationary magnet, eddy currents will be produced due to a magnetic force on the electrons in the conductor
Classical electromagnetism and special relativity
Classical_electromagnetism_and_special_relativity
Law of electrical current and voltage
Ohm's law states that the electric current through a conductor between two points is directly proportional to the voltage across the two points. Introducing
Ohm's_law
Small-scale magnetometer
the eddy current shows a constant pattern as it moves along the material being tested. But a crack or pit in the material interrupts the eddy current, so
MEMS_magnetic_field_sensor
Steel spinning roller coaster at Plopsaland
of traditional spinning roller coasters. Each of the trains have an eddy current brake situated under the coaster's car. When the roller coaster's metallic
The_Ride_to_Happiness
Low-power, low-speed AC motor
split phase electromagnetic coils. Eddy currents are generated in the disk and the reaction between the eddy currents and the flux produces the driving
Induction_disk_motor
American entrepreneur, engineer and philanthropist (1924-2012)
of rotating machinery. He designed the first commercially successful eddy current proximity transducer. It became the de facto standard when the American
Donald_E._Bently
Light, strong and rigid composite material
inspection of delamination defects in unidirectional CFRP by non-contact eddy current testing". Composites Part B: Engineering. 224 109167. doi:10.1016/j.compositesb
Carbon-fiber reinforced polymer
Carbon-fiber_reinforced_polymer
Energy recovery mechanism
transmits torque mechanically Eddy current brake – Device used to slow or stop a moving object by generating eddy currents "Transforming the Tube" (PDF)
Regenerative_braking
High frequency optimised electric wire
However at high frequencies, alternating current (AC) does not penetrate deeply into conductors due to eddy currents induced in the material; it tends to
Litz_wire
Model of electrically conducting fluids
relation to the lines of force is forbidden because it would give infinite eddy currents. Thus the matter of the liquid is "fastened" to the lines of force.
Magnetohydrodynamics
steel is removed by electromagnets, and nonferrous metals are removed by eddy-current separators. Then an air classifier can be used to deal with the remaining
Air_classifier
Physical quantity in electromagnetism
displacement current density is the rate of change of the electric displacement field D, appearing as ∂D/∂t in Maxwell's equations. Displacement current density
Displacement_current_density
EDDY CURRENT
EDDY CURRENT
Surname or Lastname
English
English : from the Middle English personal name Ode (see Ott).
Girl/Female
German, Hebrew
Pleasure; Enjoyment
Surname or Lastname
English
English : probably a variant of Eade. This name is also found in Normandy, France.
Male
English
Variant spelling of English Eddie, EDDY means "guardian of prosperity."
Female
English
Pet form of English Adelaide, ADDY means "noble sort."
Boy/Male
Hebrew English
Son of Adam: Man of the red earth.
Female
Italian
 Pet form of Italian Edvige, EDDA means "contending battle." Compare with another form of Edda.
Female
English
 Variant spelling of English Eda, EDDA means "rich battle." Compare with another form of Edda.
Girl/Female
Norse Dutch German
Poetry.
Surname or Lastname
English (Devon)
English (Devon) : from the Middle English personal name Edwy, Old English Ēadwīg, composed of the elements ēad ‘prosperity’, ‘fortune’ + wīg ‘war’.
Boy/Male
French American English Greek
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Boy/Male
French American English Swedish
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Surname or Lastname
English and Scottish
English and Scottish : variant spelling of Eddy.
Surname or Lastname
English (West Yorkshire)
English (West Yorkshire) : from the Middle English personal name Addy, a pet form of Adam.
Girl/Female
French German
Nobility. French form of the Old German Adalheidis, a compound of 'athal' (noble) and 'haida'...
Boy/Male
American, Anglo, British, Christian, Danish, Dutch, English, French, German, Gothic, Netherlands, Swedish, Swiss
Names Beginning with Ed; Form of Edward; Guardian of Prosperity; Wealthy Defender; Wealthy Protector; Wealthy Guard
Surname or Lastname
English
English : from a pet form of Eade.
Surname or Lastname
English
English : unexplained.
Surname or Lastname
English
English : perhaps, as Reaney suggests, a patronymic from a personal name, a short form of Edwin or Edward, or for Eade 1.
Surname or Lastname
English
English : from a pet form of Eade.
EDDY CURRENT
EDDY CURRENT
Girl/Female
American, British, English
Meadow of Ash Trees
Surname or Lastname
English
English : of uncertain origin. Early examples, as for example William Spring (Yorkshire 1280), all point to a personal name or nickname, perhaps going back to an Old English byname derived from the verb springan ‘to jump or leap’ (see Springer 1). Alternatively, it could be a topographic name from Middle English spring ‘young wood’, ‘spring’. Compare Springer. Reaney derives the surname from the word denoting the season, although the word is not attested in this sense until the 16th century, the usual Middle English word being lenten. Compare Lenz. The surname has also been established in Ireland (County Kerry) for several centuries.German : from Middle High German sprinc, Middle Low German sprink ‘spring’, ‘well’, hence a topographic name for someone who lived by a spring or well, or habitational name from Springe near Hannover.Jewish (Ashkenazic) : variant of Springer.John Spring emigrated from England and settled in Watertown, MA, in 1634.
Boy/Male
Hindu, Indian, Kannada, Marathi, Telugu
Born of Intellect
Male
Swiss
, (whom) Jehovah has set up.
Girl/Female
Greek
Beautiful.
Female
Egyptian
, city of life.
Girl/Female
Latin
Lioness.
Girl/Female
Australian, British, English, German, Greek, Latin, Swedish
Honey; Sweet
Girl/Female
American, Arabic, Australian, Celtic, Chinese, Christian
Virtuous; Noble; Strong; She Ascends; High Hill; Force; Strength; Sweet; Adorable; Innocent and Very Intelligent; Female Version of Brian
Male
English
Farmer
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
n.
A whirling motion; an eddy, as of water; a whirl.
n.
To whirl, or cause to whirl, as in an eddy.
pl.
of Neddy
a.
Having some of the forms, such as drapery or the like, too sharply defined.
v. t.
To collect as into an eddy.
v. i.
To move as an eddy, or as in an eddy; to move in a circle.
n.
The religious or mythological book of the old Scandinavian tribes of German origin, containing two collections of Sagas (legends, myths) of the old northern gods and heroes.
p. pr. & vb. n.
of Eddy
n.
That which swallows irretrievably; a whirlpool; a sucking eddy.
pl.
of Edda
n.
A pet name for a donkey.
pl.
of Eddy
a.
Easily irritated; sharp; as, an edgy temper.
n.
A backset; a countercurrent; an eddy.
imp. & p. p.
of Eddy
n.
A current of water or air moving in a circular direction; a whirlpool.
v. i.
To run swiftly round, as a small stream flowing among stones or other obstructions; to eddy; also, to make a murmuring sound, as water does in running over or through obstructions.
n.
A circle made by the notion of a fluid; an eddy; a ripple.
v. i.
To whirl; to eddy.
n.
A current of air or water running back, or in a direction contrary to the main current.