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This article is about the electrical switch. For the switchable magnetic mount, see magnetic switchable device.
See also: proximity sensor and reed switch
Magnetic switch
Magnetic switch is an electrical switch that makes or breaks contact in the presence of a magnetic field. Applications include situations where it is not desirable or possible for moving elements to make direct contact with the switch, such as in explosive environments, submerged in liquids, and where repetitive contact with a mechanical switch would result in undesired wear. Generally, the switch remains actuated as long as a sufficiently strong magnetic field is present, and opens when the field is removed.
Magneticswitch is an electrical switch that makes or breaks contact in the presence of a magnetic field. Applications include situations where it is not...
The reed switch is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the...
A magneticswitchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows...
A magnetic starter is an electromagnetically operated switch which provides a safe method for starting an electric motor with a large load. Magnetic starters...
A3144) refers to having switching thresholds in only one polarity of the magnetic field. Omnipolar switches have two sets of switching thresholds, for both...
A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of...
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable...
rotation, an electronic control system switches on the windings of successive stator poles in sequence so that the magnetic field of the stator "leads" the rotor...
Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits. It is defined as the ratio of magnetomotive force...
static; the equations of magnetostatics can be used to predict fast magneticswitching events that occur on time scales of nanoseconds or less. Magnetostatics...
A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents,: ch1 ...
moving part. Proximity switches operate by the disturbance of an electromagnetic field, by capacitance, or by sensing a magnetic field. Rarely, a final...
and phase caused by varying the local magnetic field using gradient coils. As these coils are rapidly switched during the excitation and response to perform...
Gravitomagnetism Magnetic hysteresis Magnetar Magnetic bearing Magnetic circuit Magnetic cooling Magnetic field viewing film Magnetic stirrer Switched-mode power...
magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave. The disturbance that drives the magnetic storm...
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into...
1900s but soon fell out of favour because of the unreliability of the magneticswitches, largely due to friction and rapid corrosion affecting its cast iron...
short-circuited, compressing the magnetic field and creating an inductive current; At the point of maximal flux compression, the load switch is opened, which then...
cards. Magnetic recording on steel tape and wire was invented by Valdemar Poulsen in Denmark around 1900 for recording audio. In the 1950s, magnetic recording...
accompanying magnetic field, ejected from the solar corona and released into the solar wind. Types of (civil) man-made EMP events include: Switching action...
A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux. The flux is usually generated by permanent magnets or electromagnets...
a magnetisation that is switchable by an applied magnetic field ferroelectricity – an electric polarisation that is switchable by an applied electric field...
the magnetic field produced by the coil and pulling the core towards the field. The magnet is physically connected to a mechanical power switch, which...
the current to the coil is switched off, the armature is returned by a force, approximately half as strong as the magnetic force, to its relaxed position...
Magnetic refrigeration is a cooling technology based on the magnetocaloric effect. This technique can be used to attain extremely low temperatures, as...
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