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A solenoid (/ ˈ s oʊ l ə n ɔɪ d / [1]) is a type of electromagnet formed by a helical coil of wire whose length is substantially greater than its diameter, [2] which generates a controlled magnetic field. The coil can produce a uniform magnetic field in a volume of space when an electric current is passed through it.
The device creates a magnetic field [1] from electric current, and uses the magnetic field to create linear motion. [2] [3] [4] In electromagnetic technology, a solenoid is an actuator assembly with a sliding ferromagnetic plunger inside the coil. Without power, the plunger extends for part of its length outside the coil; applying power pulls ...
Summary of results: The calculation showed that the space needed for the purely orthocyclic winding with enameled wire fills a rectangular area that measures 1.86 mm x 8.85 mm. Taking into account the assumption that it is a round coil with an inner diameter of 8 mm, then, the outer diameter is 11.72 mm.
where d is the orifice diameter. A typical solenoid force might be 15 N (3.4 lb f). An application might be a low pressure (e.g., 10 psi (69 kPa)) gas with a small orifice diameter (e.g., 3 ⁄ 8 in (9.5 mm) for an orifice area of 0.11 in 2 (71 mm 2) and approximate force of 1.1 lbf (4.9 N)).
A shading coil or shading ring (Also called Frager spire or Frager coil) is one or more turns of electrical conductor (usually copper or aluminum) located in the face of the magnet assembly or armature of an alternating current solenoid. The alternating current in the energized primary coil induces an alternating current in the shading coil.
Thus a 100 mm diameter voice coil, with a 12 mm winding height has similar power handling to a 50 mm diameter voice coil with a 24 mm winding height. In 'underhung' voice coil designs (see below), the coil is shorter than the magnetic gap, a topology that provides consistent electromotive force over a limited range of motion, known as X max.
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