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Magnet wire 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 , hard disk head actuators , electromagnets , electric guitar pickups, and other applications that require tight coils of insulated wire.
George Jacobs. 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.
Until George Jacobs invented a practical enamel for the purpose, cloth was used to insulate magnet wire. This had a number of drawbacks such as, the cloth being too expensive, becoming worn, and bulky. Wire with enamel insulation could be more densely packed, allowing smaller, more efficient motors, coils and other electromagnetic devices.
The magnet wire enamel is made by dissolving the PAI powder in a strong, aprotic solvent such as N-methyl pyrrolidone. Diluents and other additives can be added to provide the correct viscosity for application to the copper or aluminum conductor. Application is typically done by drawing the conductor through a bath of enamel and then through a ...
The major application of formvar resins is as electrical insulation for magnet wire. It is combined with other "wire enamels" which are then coated onto copper wire and cured in an oven to create a crosslinked film coating. [5]
Litz wire is used for the helix and variometer in both helix houses. It consists of 9 × 5 × 5 × 27 (totaling 6,075) strands of #36 AWG (0.127 mm [0.0050 in] diameter) magnet wire and multiple layers of cotton, hemp, and plastic insulation, in a cable 19 mm (3 ⁄ 4 inch) in diameter, totaling 151,875 circular mils (0.7695619839 cm 2) of ...
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