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Inductor made with magnet wire wound around a toroidal core. Magnet wire [1] or enameled wire is a copper or aluminium wire coated with a very thin layer of insulation.It is used in the construction of transformers, inductors, motors, generators, speakers, headphones, hard disk head actuators, electromagnets, electric guitar pickups, and other applications that require tight coils of insulated ...
By 1922, Dudlo Wire was the largest magnet wire manufacturer in the country—but by 1927, the owners were concerned about the financial health of the country. They sold out to a conglomerate, General Cable Corporation, in 1927, with the Great Depression beginning in 1929.
George Jacobs (1877 – 1945) was an American inventor, who invented enamel insulation for magnet wire. [1] He founded Dudlo Manufacturing, which became part of General Cable Corporation, and Inca Manufacturing, which became Phelps-Dodge Magnet Wire. [2] [3]
Founded in 1930, is a global provider [4] of magnet wire, used by original equipment manufacturers as well as manufacturers in the automotive, energy, and industrial sectors. In 2020, a global joint venture between Essex Magnet Wire and Furukawa Electric Co., Ltd. was formed and operates under Essex Furukawa Magnet Wire. [6]
Film-insulated magnet wire permits a manufacturer to obtain the maximum number of turns within the available space. Windings that use thicker conductors are often wrapped with supplemental fiberglass insulating tape. Windings may also be impregnated with insulating varnishes to prevent electrical corona and reduce magnetically induced wire ...
The magnetic moment and the magnetic field of the electromagnet are proportional to the number of loops of wire, to the cross-section of each loop, and to the current passing through the wire. [ 45 ] If the coil of wire is wrapped around a material with no special magnetic properties (e.g., cardboard), it will tend to generate a very weak field.
The magnetic field is often created by a current-carrying coil of wire around the core. The use of a magnetic core can increase the strength of magnetic field in an electromagnetic coil by a factor of several hundred times what it would be without the core. However, magnetic cores have side effects which must be taken into account.
Magnetic field (green) induced by a current-carrying wire winding (red) in a magnetic circuit consisting of an iron core C forming a closed loop with two air gaps G in it. In an analogy to an electric circuit, the winding acts analogously to an electric battery, providing the magnetizing field , the core pieces act like wires, and the gaps G act like resistors.
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