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1. (n.) armature
the protective covering of an animal or plant, or any part serving for defense or offense.
2. armature
the part of a generator that includes the main current-carrying winding, in which the electromotive force is induced.
3. armature
the moving part in an electrical device, as a buzzer or relay, that is activated by a magnetic field.
4. armature
the iron or steel placed across the poles of a permanent magnet to close it.
5. armature
a framework on which a clay, wax, or plaster figure is supported while being sculpted.
Etymology: (1535–45; (< MF) < L armātūra an outfit, armor <armāt(us), ptp. of armāre to arm2)
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| Definition of 'armature' |
Princeton's WordNet |
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1. (noun) armature
coil in which voltage is induced by motion through a magnetic field
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| Definition of 'armature' |
Webster Dictionary |
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1. (noun) armature
armor; whatever is worn or used for the protection and defense of the body, esp. the protective outfit of some animals and plants
2. (noun) armature
a piece of soft iron used to connect the two poles of a magnet, or electro-magnet, in order to complete the circuit, or to receive and apply the magnetic force. In the ordinary horseshoe magnet, it serves to prevent the dissipation of the magnetic force
3. (noun) armature
iron bars or framing employed for the consolidation of a building, as in sustaining slender columns, holding up canopies, etc
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| Definition of 'armature' |
The Standard Electrical Dictionary |
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1. armature
(a.) A mass or piece of iron or steel, or a collection of pieces of iron designed to be acted on by a magnet. While nickel or cobalt might be used, they rarely or never are except in experimental apparatus. The armature of a permanent horse shoe magnet is simply a little bar of soft iron. When the magnet is not in use it is kept in contact with the poles with the idea of retaining its magnetism. It is then said to be used as a keeper. A bar magnet does not generally have an armature. The armature is also used to exhibit the attraction of the magnet.
Sometimes an armature is made of steel and is permanently magnetized. Such an armature, termed a polarized armature, is repelled when its like poles are opposed to like poles of the magnet and otherwise is attracted with force due to the sums of the magnetism. If the magnet is sufficiently powerful depolarization of the armature may ensue when like poles are opposed to like poles. Polarized armatures are used in various appliances, magneto generators, telegraphic instruments and others.
(b) In a dynamo or Motor the mass of laminated iron or of wire which carries the coils of insulated wires which are caused to rotate in the field of force of the field magnets in order to establish and maintain potential difference with its accompanying current, or which rotates under the effects of a current in a motor. (See Dynamo Electric Generator.)
The work of the armature core is twofold. It acts as a portion of the magnetic circuit, conducting the lines of force, and by virtue of its high permeability or multiplying power concentrating a number of the lines of force through its own substance. To enable it to act with efficiency in this direction it should be made of iron of the highest permeability, and should approach as closely as possible to the armature cores consistent with leaving space for the wire winding. It next acts as a support for the wires which are to be swept through the field of force. Thus it acts both to establish a strong field and then acts as a carrier for the wires which are to be cut by the wires in question. In connection with this subject the different definitions under Armature, Dynamo, Commutator, Induction and similar topics may be consulted.
(c) See Armature of Influence Machine.
(d) See Armature of Leyden Jar or Static Condenser.
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Definitions of armature 
