(electricity) alternating current

A device for causing acceleration.

The real component of the power of an alternating current circuit; the product of the voltage and that part of the current that is in phase with the voltage

(historical) A rotating machine for the generation of high-frequency alternating current, used in radio transmission.

(electrical engineering) An electric generator which produces alternating current through mechanical means.

(US) A standard for the measurement of the diameter of wire, especially of non-ferrous, electrically conducting wire.

Short for amortisseur winding. [A squirrel cage winding placed near the surface of the pole faces of a synchronous motor. Its main purpose is to dampen any speed fluctuations or oscillations that may occur as a result of sudden load changes. It is also used to accelerate the motor during starting. All the windings are shorted at the two ends of each pole of the motor. As the rotating field moves past the winding it induces currents in the winding which produce torque and accelerate the motor so as to overcome the lag in its speed.]

A squirrel cage winding placed near the surface of the pole faces of a synchronous motor. Its main purpose is to dampen any speed fluctuations or oscillations that may occur as a result of sudden load changes. It is also used to accelerate the motor during starting. All the windings are shorted at the two ends of each pole of the motor. As the rotating field moves past the winding it induces currents in the winding which produce torque and accelerate the motor so as to overcome the lag in its speed.

Activated, as with electric power.

A form of electromechanical amplifier in which an AC motor drives a DC generator

(electrical engineering) An undesired and uncontrolled electric arc from one conductor through the air (or other gas) to a conductor at ground potential or a different voltage phase.

The rotating part of an electric motor or dynamo, which mostly consists of coils of wire around a metal core.

That dims automatically: applied to electrochromic mirrors used in motor vehicles to reduce glare.

Describing a motor whose speed is automatically synchronized by the motion of another

(electrical engineering) A transformer with a single winding, its output being taken from taps.

An array of similar things.

fitted with a battery or batteries, which provide(s) the power to operate the device.

(electrical engineering) The process of restoring an electric power station or part of an electric grid to operation without relying on the external electric power transmission network.

A coil, carrying an electric current, that serves to deflect and thus extinguish an arc formed when the contacts of a switch part to turn off the current.

A motor-generator set used for voltage regulation in direct current electrical power circuits.

The current that a fuse, circuit breaker, or other electrical apparatus is able to interrupt without being destroyed or causing an electric arc with unacceptable duration.

An electric coil of small resistance and large inductance, used in an alternating current circuit to impede or throttle the current, or to change its phase.

(electronics) A coil of electrically conductive wire through which electricity can flow.

A person whose job it is to wind electromagnetic coils.

An electrical switch, in a generator or motor, that periodically reverses the direction of an electric current.

(airplanes) Something that aims at ensuring that the electric generator produces a constant frequency.

(electrical engineering) A device that changes voltage or frequency, for example one that converts alternating current to direct current.

Alternative form of converter [(electrical engineering) A device that changes voltage or frequency, for example one that converts alternating current to direct current.]

(electronics) A device that modifies alternating current to a lower frequency without converting it to direct current

A winding in a synchronous motor, (in the form of a squirrel cage), that damps any oscillation caused by changes in loading

One of two coils of conducting wire so related to one another or to a magnet or armature common to both, that one coil produces polar action contrary to that of the other.

A rheostat that is used to vary the intensity of a domestic electric light

A device that distributes electric current, especially to the spark plugs in an internal combustion engine.

(physics) An electricity generator; a dynamo-electric machine.

A generator that creates electricity using spinning magnets; a dynamo.

A device for converting electrical power to another form.

(electrical engineering) A dynamo which is also a starter motor.

An electrode, in the form of a metal plate buried in external soil, used to earth the electrical system of a building

A motor that converts electrical energy into kinetic energy.

A toothbrush that uses electric power, usually supplied by a battery, to move the brush head rapidly.

A tradesperson who installs, repairs and maintains electrical wiring and equipment.

(physics) Any device that generates electricity

(informal) A device or appliance that uses electricity even while switched off.

A conductor of low resistance joining the armature ends of the series field coils of dynamos connected in parallel.

A piece of laboratory apparatus used to connect equipment having ground glass joints of different sizes

(electrical engineering) An electromagnet, consisting of a coil of wire through which a current flows, used to generate a magnetic field in an electromagnetic machine, typically a rotating machine such as a motor or generator.

A special kind of electrical transformer, originally designed to generate high-voltage sawtooth signals at a relatively high frequency, and now extensively used in switched-mode power supplies.

(electrical engineering) A device to prevent excessive overcurrent from overload or short circuit in an electrical circuit, containing a component that melts and interrupts the current when too high a load is passed through it.

(engineering, US) An electrical generator that runs on gasoline.

A variable-speed electric motor (incorporating a variable gearbox)

(slang) A generator (device that converts mechanical to electrical energy).

Especially, a machine that converts mechanical energy into electrical energy.

(electricity) A battery-plate somewhat like a grating, especially a zinc plate in a primary battery, or a lead plate in a secondary or storage battery.

A device for checking electrical equipment for short circuits etc.

(historical) A machine in which the energy of an electric current is used, by means of two small electromagnets, to keep up the vibrations of a large and heavily-weighted tuning fork whose arms are connected to two pistons working a miniature pump.

Of an electric generator that produces alternating current

A type of synchronous motor in which the rotor consists of a central nonmagnetic core around which are rings of material with a high degree of magnetic hysteresis; it generates near constant torque at varying speeds, even when starting.

(electricity) a coil of wire designed to provide impedance in an electric circuit

A transformer that produces a high voltage alternating current pulse from a low voltage direct current supply, especially such a device in the starter motor of an automobile

An electromagnetic communication and detection system, relying on the fact that a moving magnet will induce an electrical current in a nearby conducting wire.

(mechanics) An alternating current motor in which currents in the secondary wiring of the rotor are created by induction from the magnetic field of the primary winding of the stator.

(dated) An induction coil.

(electrical engineering) An auxiliary pole of a commutator placed between the main poles to increase its efficiency.

(electrical engineering) A power inverter.

(electricity) A device that converts direct current into alternating current.

The condition of a distributed generation (DG) generator continuing to power a location even though power from the electric utility is no longer present.

A transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while galvanically isolating the device from the power source, usually for safety reasons.

A small, low-cost self-oscillating voltage booster, typically used for driving small loads.

(electrical) The angle between the line joining the brushes of a continuous-current dynamo and the diameter symmetrical between the poles.

A deep-cycle battery used to power electric appliances and equipment in a motor home, caravan, boat, or other vehicle with living quarters.

An electric motor in which the equivalent of the stator and rotor are linear and parallel, normally one part is a vehicle and the other a track on which it moves

The process by which an electric utility cuts power to some customers in response to a shortage of available electricity.

Alternative form of load cell [A transducer used to create an electrical signal whose magnitude is directly proportional to the force being measured.]

A specification which indicates the current amperage being drawn by an electric motor when it is "locked up", i.e. not turning.

A loop-shaped intrauterine device.

A small magnetic dynamo, especially one that provides power to the spark plugs of a small internal combustion engine (now mostly used in aircraft).

A sound associated with alternating current which has a frequency a multiple of that of the mains electricity.

In an internal combustion engine with two or more cylinders, an induction coil and vibrator placed in the circuit between the battery or magneto and the coils for the different cylinders, which are used without vibrators of their own.

A direct current electrical machine with two pairs of brushes, able to be used as an amplifier or rotary transformer.

Any protein capable of converting chemical energy into mechanical work.

(mathematics) A variable that can be a split-complex number.

(physics, obsolete) a coil; when Johann Schweigger in 1820 invented the electric coil, increasing the electro-magnetic field from a single wire, this invention was called a multiplier.

Of a generator or power plant: connected to the grid.

(electronics) An electrical transformer that utilizes magnetic inductance

A power station that provides energy supply only during peak usage periods.

An electric power station used to rapidly generate power to prevent brownouts when demand rapidly increases, exceeding supply and the ability of baseload power generation stations to ramp up the supply of electricity.

(electrical) A special form of rotary converter with stationary commutator and rotating brushes, in which the exciting field is induced by the alternating current in a short-circuited magnetic core instead of being produced by an external magnet.

(electrical engineering) In a polyphase electrical power system, one of the power-carrying conductors, or the alternating current carried by it.

(meteorology) A small unmanned balloon whose ascent is followed by a theodolite to obtain data for the computation of the speed and direction of winds in the upper air.

(electronics) Synonym of resettable fuse

Any device that delivers a constant electric current at a constant voltage

Electricity or a supply of electricity.

(electrical engineering) A device that converts direct current electricity to alternating current electricity.

A source of power such as the mains or a generator.

Any tool powered by an electric motor.

A toothbrush with bristles moved by electric power; an electric toothbrush.

Any other unit capable of providing power.

Electrically (or mechanically) operated.

(electronics) A directly driven inductive coil, as in a transformer or induction motor that is magnetically coupled to a secondary

A device that converts alternating current into direct current; often a diode.

an alternating current motor with a stator winding like that of an induction motor and a rotor that has projecting poles of ferromagnetic material

A static induction machine used for maintaining the charge of a quadrant electrometer.

an alternating current commutator motor, designed for single-phase operation, in which the armature is supplied by induction from the field of the stator winding

A device whose electrical output is proportional to the angular position of an object such as a rotor.

A set of replacement coils on an electric motor or other device that uses wound wires to generate a magnetic field.

Either of a pair of spirally wound conductors with metal balls at their ends. Placing one above the other forms an induction coil.

A reflector intended for pedestrians, runners, and motorized and non-motorized vehicles. It aids visibility of a person or vehicle as it reflects light from headlights of vehicles.

(electronics) An inductive coil or loop that is magnetically powered by a primary in a transformer or similar.

(electrical engineering) A synchro whose currents are used directly to drive a receiver synchro that rotates in unison with the synchro transmitter.

(electrical engineering) Of an electric motor, having the windings connected in series.

An electric motor in a servomechanism, especially one which incorporates feedback so it accurately positions the device.

A magnetic pole in an electric motor or solenoid with a shading coil that encircles a portion of the pole face. The shading coil creates an out-of-phase current that allows a single phase alternating current electric motor to start or minimizes chatter in an alternating current solenoid or relay.

A particular type of AC single-phase induction motor

A shorted coil (usually one turn) embedded in an alternating current pole face and encircling a portion of that face.

(electrical engineering) The abnormal operation of a three-phase machine when its supply is changed by accidental opening of one conductor.

An electric current which, though too weak to blow a fuse or cause immediate damage to equipment, will in time burn out the equipment.

(engineering) An electromechanical device consisting of such a coil containing a metal core, the movement of which is controlled by the current.

An induction coil used for producing sparks, as in an internal combustion engine.

A gap, between two electrical terminals, across which sparks are generated.

An electric dynamometer having two coils arranged so that one carries the primary current, and the other the secondary current, of a transformer.

(mechanics) A subclass of induction motors that harness electromagnetism in order to generate motion.

An electromagnetic actuator that converts digital pulses of input into analog rotary motion, the degree of rotation being proportional to the number of pulses received.

(electrics, electronics) A device that can rapidly recharge a battery cell/pack.

A surge protector.

(electrical engineering) A type of rotary electrical transformer that is used for measuring the angle of a rotating machine such as an antenna platform. In its general physical construction, it is much like an electric motor.

Alternative form of synchronmotor [Synonym of synchronous motor]

An electric motor whose rotation is synchronized with the frequency of the supplied current

(electronics) The frequency of rotation of the magnetic field inside an AC induction motor.

An instrument that indicates the degree to which two alternating current systems are synchronised with each other; used especially in electricity generation

(surveying) The sliding crosspiece, or vane, on a leveling staff.

(electrical) A shunt winding on field magnets for maintaining their magnetism when the main circuit is open.

A coil of wire included within hearing aids and cochlear implants that responds to electromagnetic signals usually generated by an induction loop.

A kind of magnetic amplifier used in power systems for compensating reactive power.

(electrical engineering) A static device that transfers electric energy from one circuit to another by magnetic coupling. Their main use is to transfer energy between different voltage levels, which allows choosing most appropriate voltage for power generation, transmission and distribution separately.

(historical) A device attached to the wheel of a cart, carriage, etc. to measure distance travelled

A turbine directly connected to an electric generator in order to generate power.

Of an electrical generator: having armatures with one slot for each phase and each pole.

A device that can change the parameters of something.

(historical) A device designed to electromechanically interrupt current flowing to the step-up transformer which was used to generate the high tension positive supply in old battery-operated (automotive) valve radios.

(electronics) A coil of wire attached to the apex of the cone of a loudspeaker that provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

A type of rotor that consists of a laminated core which is cylindrical in shape and carries AC current across it. Slip rings are mounted on the shaft.