Posted inNon Destructive Testing
Resonant Circuits
Eddy current probes typically have a frequency or a range of frequencies that they are…
Posted inNon Destructive Testing
Eddy Current Instruments
Eddy current instruments can be purchased in a large variety of configurations. Both analog and digital instruments…
Posted inNon Destructive Testing
Phase Lag
Phase lag is a parameter of the eddy current signal that makes it possible to…
Posted inNon Destructive Testing
Depth of Penetration & Current Density
Eddy currents are closed loops of induced current circulating in planes perpendicular to the magnetic…
Posted inNon Destructive Testing
Impedance
Electrical Impedance (Z), is the total opposition that a circuit presents to alternating current. Impedance is…
Posted inNon Destructive Testing
Circuits and Phase
A circuit can be thought of as a closed path in which current flows through…
Posted inNon Destructive Testing
Mutual Inductance
The magnetic flux through a circuit can be related to the current in that circuit…
Posted inNon Destructive Testing
Self-Inductance and Inductive Reactance
The property of self-inductance is a particular form of electromagnetic induction. Self inductance is defined as the…
Posted inNon Destructive Testing
Induction and Inductance
Induction In 1824, Oersted discovered that current passing though a coil created a magnetic field capable of shifting a…
Posted inNon Destructive Testing
Current Flow and Ohm’s Law
Ohm's law is the most important, basic law of electricity. It defines the relationship between…