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Eddy Current Testing at Level 2, International Atomic Energy Agency, Vienna, 2011 (pdf 5.6 MB). ASTM E3052 Standard Practice for Examination of Carbon Steel Welds Using Eddy Current Array Official web page of Lorentz Force Velocimetry and Lorentz Force Eddy Current Testing Group Archived 2013-11-17 at the Wayback Machine
In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction or by the relative motion of a conductor in a magnetic field. Eddy currents flow in closed loops within conductors, in planes ...
Eddy current sensors are displacement sensors that use the principle of eddy current formation to sense displacement. These sensors measure shaft displacement in rotating machinery and have been around for many years as they offer manufacturers high-linearity, high-speed measurements, and high resolution. [ 1 ]
Although RFT works in nonferromagnetic materials such as copper and brass, its sister technology eddy-current testing is preferred. The basic RFT probe consists of an exciter coil (also known as a transmit or send coil) which sends a signal to the detector (or receive coil). The exciter coil is pumped with an AC current and emits a magnetic field.
The closer that q 1 and q 2 are, the greater the effect. When q 2 is inside a conductive medium such as a thick slab made of copper or aluminum, it more readily responds to the force applied to it by q 1. The energy of q 1 is not instantly consumed as heat generated by the current of q 2 but is also stored in two opposing magnetic fields
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Since d 2 = 0, the 3-form J satisfies the conservation of current (continuity equation): = = The current 3-form can be integrated over a 3-dimensional space-time region. The physical interpretation of this integral is the charge in that region if it is spacelike, or the amount of charge that flows through a surface in a certain amount of time ...
Skin depth has a major influence on eddy current losses, was missing from the formula, and has the correct dimension so the units on left and right side match. Henkdeleeuw 05:54, 23 February 2010 (UTC) Units still don't add up in the current article. When I check T^2*m^2*Hz^2/(Ohm*m*m) I get kg/(s^3*m^2), but power is kg*m^2/s^3.