The figure below shows four types of generators. To generate electricity must begin with main magnetic field, then this field will be cut by a driver, the main field can be produced by a permanent magnet which may be part of the stator, as is shown in Figure A, you can either be the rotor as shown in Figure B . the main field can be an electromagnetic field instead of a permanent magnet, coil that produces it is called the field winding , or simply the field.
can field on the stator winding, as shown in Figure C , or the rotor as shown in Figure D . Drivers in the induction of electricity form the armature winding. In direct current generators, the armature winding is on the rotor or rotating part, however, in AC generators for certain applications, the armature winding is on the stationary part (stator).
can field on the stator winding, as shown in Figure C , or the rotor as shown in Figure D . Drivers in the induction of electricity form the armature winding. In direct current generators, the armature winding is on the rotor or rotating part, however, in AC generators for certain applications, the armature winding is on the stationary part (stator).
Source: The Practical Book of generators, transformers and electric motors - Gilberto Harper Enriquez
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