Determine The Construction Of Ac Generator ?
The simplest possible generator is a single coil of wire rotating in a uniform magnetic field. The emf induced in such a case is an alternating emf, and hence such a generator is referred to as and hence such a generator is referred to as an ac generator. The coil in which the emf is induced is called the armature. A high voltage may be obtained in an ac generator by having the coil wound on an iron core, the flux linked by the coil being thus increased, and also by having a large number of turns in series for each coil. Where the coil rotates, the ends of the coils are connected to circular ring called collecting rings or slip rings. Carbon (graphite) brushes bearing on these rings make connection to the outside circuit. The basic elements of an ac generator are (1) a field magnet, (2) the armature genitors the armature is made stationary and the field magnet is caused to rotate.
