eddy$23851$ - definizione. Che cos'è eddy$23851$
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Cosa (chi) è eddy$23851$ - definizione

AMERICAN ARCHITECT
Colonel J.W. Eddy; J.W. Eddy; J W Eddy; JW Eddy; James Wade Eddy; James W. Eddy

Eddy current         
  • Demonstration of Waltenhofen's pendulum, precursor of eddy current brakes. The formation and suppression of eddy currents is here demonstrated by means of this pendulum, a metal plate oscillating between the pole pieces of a strong electromagnet. As soon as a sufficiently strong magnetic field has been switched on, the pendulum is stopped on entering the field.
  • Lamination of magnetic cores in transformers greatly improves the efficiency by minimising eddy currents
  • E-I transformer laminations showing flux paths.  The effect of the gap where the laminations are butted together can be mitigated by alternating pairs of E laminations with pairs of I laminations, providing a path for the magnetic flux around the gap.
  • Eddy current brake. The North magnetic pole piece ''(top)'' in this drawing is shown further away from the disk than the South; this is just to leave room to show the currents. In an actual eddy current brake the pole pieces are positioned as close to the disk as possible.
  • '''B'''}}, green</span>)'' with insulation ''(C)'' between them reduces the eddy currents. Although the field and currents are shown in one direction, they actually reverse direction with the alternating current in the transformer winding.
  • A cross section through a linear motor placed above a thick aluminium slab. As the [[linear induction motor]]'s field pattern sweeps to the left, eddy currents are left behind in the metal and this causes the field lines to lean.
AN EXAMPLE OF THE APPLICATION OF LENZ'S LAW
Eddy Current; Eddy currents; Eddy-current; Foucault current; Foucault Current; Magnetic eddy currents; Eddy-currents; Eddy Currents; Rotatory magnetism; Magnetism by rotation; Induction current; Induction currents
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 or by the relative motion of a conductor in a magnetic field. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.
Eddy current         
  • Demonstration of Waltenhofen's pendulum, precursor of eddy current brakes. The formation and suppression of eddy currents is here demonstrated by means of this pendulum, a metal plate oscillating between the pole pieces of a strong electromagnet. As soon as a sufficiently strong magnetic field has been switched on, the pendulum is stopped on entering the field.
  • Lamination of magnetic cores in transformers greatly improves the efficiency by minimising eddy currents
  • E-I transformer laminations showing flux paths.  The effect of the gap where the laminations are butted together can be mitigated by alternating pairs of E laminations with pairs of I laminations, providing a path for the magnetic flux around the gap.
  • Eddy current brake. The North magnetic pole piece ''(top)'' in this drawing is shown further away from the disk than the South; this is just to leave room to show the currents. In an actual eddy current brake the pole pieces are positioned as close to the disk as possible.
  • '''B'''}}, green</span>)'' with insulation ''(C)'' between them reduces the eddy currents. Although the field and currents are shown in one direction, they actually reverse direction with the alternating current in the transformer winding.
  • A cross section through a linear motor placed above a thick aluminium slab. As the [[linear induction motor]]'s field pattern sweeps to the left, eddy currents are left behind in the metal and this causes the field lines to lean.
AN EXAMPLE OF THE APPLICATION OF LENZ'S LAW
Eddy Current; Eddy currents; Eddy-current; Foucault current; Foucault Current; Magnetic eddy currents; Eddy-currents; Eddy Currents; Rotatory magnetism; Magnetism by rotation; Induction current; Induction currents
·add. ·- An induced electric current circulating wholly within a mass of metal;
- called also Foucault current.
eddy current         
  • Demonstration of Waltenhofen's pendulum, precursor of eddy current brakes. The formation and suppression of eddy currents is here demonstrated by means of this pendulum, a metal plate oscillating between the pole pieces of a strong electromagnet. As soon as a sufficiently strong magnetic field has been switched on, the pendulum is stopped on entering the field.
  • Lamination of magnetic cores in transformers greatly improves the efficiency by minimising eddy currents
  • E-I transformer laminations showing flux paths.  The effect of the gap where the laminations are butted together can be mitigated by alternating pairs of E laminations with pairs of I laminations, providing a path for the magnetic flux around the gap.
  • Eddy current brake. The North magnetic pole piece ''(top)'' in this drawing is shown further away from the disk than the South; this is just to leave room to show the currents. In an actual eddy current brake the pole pieces are positioned as close to the disk as possible.
  • '''B'''}}, green</span>)'' with insulation ''(C)'' between them reduces the eddy currents. Although the field and currents are shown in one direction, they actually reverse direction with the alternating current in the transformer winding.
  • A cross section through a linear motor placed above a thick aluminium slab. As the [[linear induction motor]]'s field pattern sweeps to the left, eddy currents are left behind in the metal and this causes the field lines to lean.
AN EXAMPLE OF THE APPLICATION OF LENZ'S LAW
Eddy Current; Eddy currents; Eddy-current; Foucault current; Foucault Current; Magnetic eddy currents; Eddy-currents; Eddy Currents; Rotatory magnetism; Magnetism by rotation; Induction current; Induction currents
¦ noun a localized electric current induced in a conductor by a varying magnetic field.

Wikipedia

J. W. Eddy

Colonel James Ward Eddy (May 30, 1832 – April 13, 1916) was the builder of Angels Flight funicular railroad in Los Angeles, California.

Eddy was born in Java, New York and matriculated at Genesee College in Lima, New York. He taught school in western New York before going to Illinois in 1853, where he studied law and was admitted to the bar in Chicago in 1855.

He practiced in Batavia, Illinois, where he also served on the Board of Education and as a county supervisor. In 1866, he was elected to the Illinois House of Representatives, and in 1870 to the Illinois Senate.

Eddy was a friend and supporter of Abraham Lincoln. He was in Washington, D.C. when the Civil War broke out, and enlisted in Cassius M. Clay and Gen. James H. Lane's battalion which was formed for the protection of Washington during the first month of the war.

Eddy spent three years in railroad construction in Arizona, founding the Arizona Mineral Belt Railroad in 1881 to build a branch of the Santa Fe road south from the town of Flagstaff.

He moved to Los Angeles in 1895, where he settled and surveyed the first transmission line for water power from Kern River to Los Angeles, which was later obtained and used by the Pacific Electric Railroad Company of Los Angeles. In 1901 Eddy developed and built Angels Flight without public financing. The funicular system of two counterbalanced cars traveled up and down parallel tracks and transported passengers along the steep grade between Third and Hill Streets and Bunker Hill, where Eddy lived. The ride lasted one minute and cost one cent.

Eddy served as vice-president of the California Children's Home, president of the Los Angeles Orthopedic Hospital, and was a member of the Chamber of Commerce.

He was married to Isabella A. Worsley, of Batavia, Illinois, until her death in 1895. In 1900 he married Jane M. Wiswell, a native of Vermont. She died in 1913.