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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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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)
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)
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
Type of sensor
encoder technologies include optical, magnetic, inductive, capacitive and eddy current. Optical technologies include shadow, self imaging and interferometric
Linear_encoder
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Electric and magnetic fields produced by moving charged objects
observers may determine different vectors. The way in which charges and currents (i.e. streams of charges) interact with the electromagnetic field is described
Electromagnetic_field
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
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
American entrepreneur, engineer and philanthropist
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
position sensors include the following: Capacitive displacement sensor Eddy-current sensor Hall effect sensor Inductive sensor Laser Doppler vibrometer (optical)
Position_sensor
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
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
still be used after testing. Common methods are ultrasonic, X-ray, HF Eddy Current, Radio Wave testing or thermography. Additionally, Structural Health
Carbon_fiber_testing
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
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
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
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
electromagnetic test methods, of which eddy-current testing is just one. also useful for the testing of drill pipes. Eddy-current testing (ECT) is used to detect
Electromagnetic_testing
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
High speed train model
seating 359 in a train 180 m (590 ft 7 in) long, with a version including eddy current brakes with a top speed of 350 km/h (220 mph), and a tilting version
AGV_(train)
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
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
Converting waste materials into new products
ejected by magnetic eddy currents: A rotating magnetic field induces an electric current around aluminum cans, creating an eddy current inside the cans that
Recycling
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
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
Fundamental interaction between charged particles
Magnetostatics is even a good approximation when the currents are not static – as long as the currents do not alternate rapidly. Magnetostatics is widely
Electromagnetism
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
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
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
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
Term in electrical engineering
is frequently made of a series of small gaps to limit the effect of eddy currents in the core. When one of the circuit-forming parts of the machine is
Air_gap_(magnetic)
Surface integral of the magnetic field
wire will cause an electromotive force (emf), and therefore an electric current, in the loop. The relationship is given by Faraday's law: E = ∮ ∂ Σ ( E
Magnetic_flux
EDDY CURRENT
EDDY CURRENT
Surname or Lastname
English
English : from a pet form of Eade.
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
English : probably a variant of Eade. This name is also found in Normandy, France.
Girl/Female
French German
Nobility. French form of the Old German Adalheidis, a compound of 'athal' (noble) and 'haida'...
Female
English
Pet form of English Adelaide, ADDY means "noble sort."
Female
Italian
 Pet form of Italian Edvige, EDDA means "contending battle." Compare with another form of Edda.
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 (Devon)
English (Devon) : from the Middle English personal name Edwy, Old English Ēadwīg, composed of the elements ēad ‘prosperity’, ‘fortune’ + wīg ‘war’.
Surname or Lastname
English and Scottish
English and Scottish : variant spelling of Eddy.
Surname or Lastname
English
English : unexplained.
Boy/Male
French American English Swedish
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Boy/Male
French American English Greek
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Surname or Lastname
English
English : from a pet form of Eade.
Male
English
Variant spelling of English Eddie, EDDY means "guardian of prosperity."
Surname or Lastname
English
English : from the Middle English personal name Ode (see Ott).
Surname or Lastname
English (West Yorkshire)
English (West Yorkshire) : from the Middle English personal name Addy, a pet form of Adam.
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
Boy/Male
Hebrew English
Son of Adam: Man of the red earth.
Girl/Female
German, Hebrew
Pleasure; Enjoyment
EDDY CURRENT
EDDY CURRENT
Girl/Female
Hebrew American
Father rejoiced, or father's joy. Gives joy. The intelligent, beautiful Abigail was Old Testament...
Girl/Female
Indian, Punjabi, Sikh
Only One Thee
Girl/Female
Tamil
New bright light.aries sign
Male
Hebrew
Variant spelling of Hebrew Yishay, YISHAI means "I possess" or "wealthy."
Boy/Male
Gujarati, Hindu, Indian
Rich; Wealthy; Happy
Girl/Female
Hindu
The one who always ascends a wish
Boy/Male
Muslim
Ringneck dove
Female
Greek
(ΕλÎνη) Modern form of Greek HelénÄ“, possibly ELENE means "torch."
Boy/Male
Afghan, Arabic
Dazzling; Brilliant
Girl/Female
Indian
Intelligent
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
EDDY CURRENT
n.
A backset; a countercurrent; an eddy.
a.
Easily irritated; sharp; as, an edgy temper.
a.
Having some of the forms, such as drapery or the like, too sharply defined.
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.
v. i.
To whirl; to eddy.
v. i.
To move as an eddy, or as in an eddy; to move in a circle.
pl.
of Eddy
imp. & p. p.
of Eddy
p. pr. & vb. n.
of Eddy
pl.
of Edda
n.
That which swallows irretrievably; a whirlpool; a sucking eddy.
n.
A current of water or air moving in a circular direction; a whirlpool.
n.
A current of air or water running back, or in a direction contrary to the main current.
n.
A whirling motion; an eddy, as of water; a whirl.
v. t.
To collect as into an eddy.
n.
To whirl, or cause to whirl, as in an eddy.
n.
A circle made by the notion of a fluid; an eddy; a ripple.
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 pet name for a donkey.
pl.
of Neddy