Search results
Results from the WOW.Com Content Network
An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil (spiral or helix). [ 1 ] [ 2 ] Electromagnetic coils are used in electrical engineering , in applications where electric currents interact with magnetic fields , in devices such as electric motors , generators , inductors , electromagnets , transformers ...
A Helmholtz coil Helmholtz coil schematic drawing. A Helmholtz coil is a device for producing a region of nearly uniform magnetic field, named after the German physicist Hermann von Helmholtz. It consists of two electromagnets on the same axis, carrying an equal electric current in the same direction. Besides creating magnetic fields, Helmholtz ...
To concentrate the magnetic field in an electromagnet, the wire is wound into a coil with many turns of wire lying side by side. [2] The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there. [2] A coil forming the shape of a straight tube (a helix) is called a solenoid. [1] [2]
Maxwell's geometry of the coils. A constant-field Maxwell coil set consists of three coils oriented on the surface of a virtual sphere. [1] According to Maxwell's original 1873 design: [2] each of the outer coils should be of radius , and distance from the plane of the central coil of radius .
The arrow or vector below each diagram indicates the direction of the magnetic field in each case. [16] A symmetric rotating magnetic field can be produced with as few as two polar wound coils driven at 90-degree phasing. However, three sets of coils are nearly always used, because it is compatible with a symmetric three-phase AC sine current ...
Pages in category "Electromagnetic coils" The following 29 pages are in this category, out of 29 total. This list may not reflect recent changes. ...
Schematic diagram. An induction coil consists of two coils of insulated wire wound around a common iron core (M). [1] [7] One coil, called the primary winding (P), is made from relatively few (tens or hundreds) turns of coarse wire. [7] The other coil, the secondary winding, (S) typically consists of up to a million turns of fine wire (up to 40 ...
Polyphase coils are electromagnetic coils connected together in a polyphase system such as a generator or motor. In modern systems, the number of phases is usually three or a multiple of three. Each phase carries a sinusoidal alternating current whose phase is delayed relative to one of its neighbours and advanced relative to its other ...