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The alternator, also known as an AC generator, is a device that converts mechanical energy from the engine into electrical energy. It is driven by a belt at two to three times the crankshaft speed by the engine crankshaft pulley.

  • While the automobile's engine was running, the alternator produced electricity to recharge the battery and supply the electrical components with the amount of electricity required. In most automobiles, alternating current alternators are preferred over direct current dynamos in electric power generation performance and longevity. The alternating current produced by the alternator is rectified just before output since most of an automobile's electrical components require direct current.
  • The alternator comprises of Stator and Rotor are located inside the alternator wherein it spins to produce a conversion of energy into electricity; diodes, that generates transformation of current  and allow it to travel in one direction;  Voltage regulator that helps prevent power surges to make sure that it will maintain voltage in the appropriate range, and cooling fan which enables to protect internal components


Alternator Service

  • The drive belt, bearings, brushes, and slip rings cause most of the alternator problems. These are moving parts that wear with usage. Diodes also fail from heat and shock. When a charging system fails, find and correct any condition that could have caused the failure. You may look for damage to the wiring harness, damaged connectors and terminals, and an open fuse or fusible link