Definition of electric motor Electric motor
We found 5 definitions of electric motor from 5 different sources.
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What does electric motor mean?
WordNet
Noun |
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| electric motor - a motor that converts electricity to mechanical work | ||
| motor machine that converts other forms of energy into mechanical energy and so imparts motion | ||
| electric clock a clock using a small electric motor | ||
| electric drill a rotating power drill powered by an electric motor | ||
| drum sander, electric sander, sander, smoother a power tool used for sanding wood; an endless loop of sandpaper is moved at high speed by an electric motor | ||
| electric hammer a hammer driven by electric motor | ||
| electric fan, blower a fan run by an electric motor | ||
| electric locomotive a locomotive that is powered by an electric motor | ||
| electric mixer a food mixer powered by an electric motor | ||
| electric refrigerator, fridge a refrigerator in which the coolant is pumped around by an electric motor | ||
| electric toothbrush a toothbrush with an electric motor in the handle that vibrates the head of the brush | ||
| electric typewriter a typewriter powered by an electric motor | ||
| self-starter an electric starting motor that automatically starts an internal-combustion engine | ||
| trackless trolley, trolley coach, trolleybus a passenger bus with an electric motor that draws power from overhead wires | ||
| armature coil in which voltage is induced by motion through a magnetic field | ||
| brush contact with something dangerous or undesirable; "I had a brush with danger on my way to work"; "he tried to avoid any brushes with the police" | ||
| field magnet a magnet that provides a magnetic field in a dynamo or electric motor | ||
| rotor coil, rotor rotating mechanism consisting of an assembly of rotating airfoils; "there are horizontal rotors on a helicopter or compressor rotors in a jet engine" | ||
| starter motor, starting motor, starter a culture containing yeast or bacteria that is used to start the process of fermentation or souring in making butter or cheese or dough; "to make sourdough you need a starter" | ||
| stator, stator coil mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves | ||
| synchronous motor electric motor in which the speed of rotation is proportional to the frequency of the A.C. power | ||
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Wiktionary 
- electric motor (Noun)
A motor that converts electrical energy into kinetic energy.
OmegaWiki DictionaryOmegaWiki Dictionary Ω
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electric motor
Electromechanic engine that converts eletrical energy into mechanical energy.
Electrical DictionaryThe Standard Electrical Dictionary 💡
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electric motor
A machine or apparatus for converting electric energy into mechanical kinetic energy. The electric energy is generally of the dynamic or current type, that is to say, of comparatively low potential and continuous or virtually continuous flow. Some electrostatic motors have, however, been made, and an influence machine can often be operated as a static motor.Electric motors of the current type may be divided into two classes--direct current and alternating current motors.Direct current motors are generally based on the same lines of construction as dynamos. One of the great discoveries in modern electricity was that if a current is passed through a dynamo, the armature will rotate. This fact constitutes the principle of the reversibility of the dynamo.Motors built on the dynamo model may be series wound, shunt wound, or compound wound, or of the magneto type, in the latter case having a fixed field irrespective of any current sent through them. The field may be produced by an electro-magnet separately excited and unaffected by the current sent through the motor.A current passed through a magneto or motor with separately excited field will turn it in the direction opposite to that required to produce the same current from it were it worked as a generator.A current passed through a series wound motor acts exactly as above.Both these facts follow from Lenz's law, q. v.A current passed through a shunt wound motor acts oppositely to the above. The direction of rotation is the same as that required to produce a current of the same direction. This is because the field being in parallel with the armature the motor current goes through the magnet coils in the direction the reverse of that of the current produced in the armature when it is used as a dynamo. Hence this also carries out Lenz's law.The compound wound motor acts one way or the other according as its shunt or series winding preponderates. The two may exactly balance each other, when there will be no motion at all. The series connections of a compound wound dynamo should therefore be reversed, making both series and shunt work in unison, if the dynamo is to be used as a motor.The general principles of the electric motor of the dynamo, or continuous rotation type, can only be outlined here. The current passing through the field magnets polarizes them and creates a field. Entering the armature by the brushes and commutators it polarizes its core, but in such a way that the north pole is away from the south pole of the field magnet, and the same for the south pole. Hence the armature rotates. As it does this the brushes connect with other commutator sections, and the poles of the armature are shifted back. This action continues indefinitely.Another class of motors is of the reciprocating type. These are now very little used. (See Motor, Reciprocating.)One valuable feature of continuous rotation electric motors is the fact that they absorb energy, to a great extent proportional in amount to the work they have to do. The rotation of the armature in the field of the motor involves the cutting of lines of force by its coils. This generates an electro-motive force contrary in direction to that producing the actuating current. The more rapid the rotation the greater is this counter-electro-motive force. The motor armature naturally revolves faster with diminished resistance to the motion of the armature. This increases the counter-electromotive force, so that less energy is absorbed. When the motor is called on to do work, the armature rotates more slowly, and the counter-electro-motive force diminishes, so that the machine absorbs more energy. (See Jacobi's Law.)Motor Electro-motive Force. The counter-electro-motive force of a motor. (F. J. Sprague.)A motor rotates in virtue of the pull of the field magnet upon the poles of the core of its armature. In responding to this pull the windings of the armature cuts lines of force and hence generates a counter-electro-motive force, for which the above term was suggested.
Wikipedia 
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An electric motor changes electrical energy into mechanical movement. A dynamo or an electric generator does the reverse: it changes mechanical movement into electric energy. Most of the electric motors work by using the force of magnetism. But, an electric motor may work using different types of forces.
In 1821, Michael Faraday made the first electric motor. It worked using the force of magnetism.
fans, washing machines, fridges, pool pumps, vacuum cleaners and fan ovens.
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