Armature

Definition and stakes

Louis Bell,  1911 Encyclopædia Britannica (1911)

“ Torque, neglecting field distortion, is at a maximum when the current is the greatest possible at the given applied voltage—that is, when the motor is at rest. With a small armature resistance this current is generally far too great for convenience; hence the motors are usually started with a rheostat in series with the winding if the current is not limited by the generator itself. The torque then depends on the sum of the resistances in circuit, and can be made just sufficient to start the motor under the required load. ”
Source: Wikisource

Thomas M. St. John,  The Study of Elementary Electricity and Magnetism by Experiment

“ In regular machines there are many loops of wire and several segments to the commutator. The rotating coils are wound upon an iron core, so that the lines of force, in passing from one pole to the other, will meet with as little resistance as possible. The coils, core, and commutator, taken together, are called the armature. The magnets which furnish the field are called the field-magnets. These are electromagnets, the current from the dynamo, or a part of it, being used to excite them. ”
Source: Gutenberg

Louis Bell,  1911 Encyclopædia Britannica (1911)

“ In the first place, whatever the voltage of transmission, the voltage of generation and that of distribution can be brought within moderate limits at a very high degree of efficiency by the use of transformers; and, in the second place, it is possible to build alternating-current generators of any required capacity, and for voltages high enough to permit the abolition of raising transformers except in unusual circumstances. At present such generators, giving 10,000 to 13, 500 volts directly from the- armature windings, are in common and highly successful use ”
Source: Wikisource

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