Electric Power Meter Eddy Current

The magnetic field b t produced due to winding current i t causes eddy current i eddy to flow inside the core.

Electric power meter eddy current. In a rapidly changing magnetic fields due to a large emf produced large eddy currents are set up. In the power meter of your house you must have observed a rotating shiny disc. An induction motor or a c. The utility company charges you for the power you use based on the monthly readings of an electric meter that measures the current passing through the service entrance into your electrical service panel the meter can either be a mechanical analog meter that is read monthly by a utility service person who visits your home or a newer digital meter that may send information via internet or radio.

The shiny metal disc in the electric power meter rotates due to eddy currents. The meter is less expensive and accurate. The flow of magnetic field inside the core of the transformer induces emf in the core according to the faraday law and lenz law causing eddy current to flow in the core as shown in the figure below. The magnetic field induces the electric currents in the disc.

This disk is the visible part of an electric motor inside the meter known as the rotor. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. Eddy currents also called foucault s currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to faraday s law of induction eddy currents flow in closed loops within conductors in planes perpendicular to the magnetic field. Consider a section of the core of transformer as shown.

The energy is the total power consumed and utilised by the load at a particular interval of time it is used in domestic and industrial ac circuit for measuring the power consumption. The silver disk you see protruding through the slot with black bars is actually made of aluminum. Motor is yet another important application of eddy current. The magnetic fields can be made to create an eddy current in the aluminum disk and cause the disk to rotate at a speed proportional to the amount of power being consumed.

Eddy current conductivity meters are widely used in the aircraft and aerospace fields for material temper verification and detecting heat damaged components. Digital portable eddy current electrical conductivity meter s technical parameters. This is a metal disc which rotates due to eddy currents developed in the disc by magnetic fields produced by alternating current. You can also observe the shiny disc at your house.

Used for inspection of non ferrous magnetic metal identification classification and status. Older electric meters this type of electric meter works on the eddy current electrical principle.