Construction and working of alternator:
Figure: Alternator
Construction
- It consists of fan, rectifier, diode, spacer, stator, drive and housing, slip rings, rotors, drive and bearing, regulator, pulley etc.
- The operation of alternator is improved by placing the stator and rotor assembly inside the iron frame of housing which provide a conducting path for the magnetic line of force.
- Voltage increase by increasing stator winding in to number of coil. Alternators consist of rotor assembly, stator assembly and rectifier mounted in housing.
- Housing near of two piece of die cast aluminium which is light and weight. Stator is clamp in housing.
Working:
- It consists of an electromagnetic rotor which is energized form the current of the battery through brush and slip ring assembly.
- Rotor is rotated by belt and pulley arrangement get power form engine stator winding is wound around the rotor.
- The rectifier circuit consisting of diodes is connected to the stator winding. Diodes are electronic device that allows current to flow only in one direction.
- When the electromagnetic rotor is turned its magnetic lines of force cut the stationary stator loop. This induces a current in the stator winding.
- Through the electromagnetic rotor reverses its polarity the alternating current produces in the stator winding is converted to direct current by the diodes.
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