In Chevrolet Metro vehicles the Voltage Regulator is crucial in that it prevents the output voltage of the alternator from rising to dangerous levels for the battery, these are normally just below 14 volts. This is achieved by comparing battery voltage and system demand to output current of alternator then regulating the field current of the alternator rotor. When the battery needs to be charged, the regulator also adds more currents through the field, while it reduces currents on the battery when it is fully charged to avoid over charging the battery. This paper aims at discovering the various types of Voltage Regulators that Chevrolet Metro has used for course of several years. Early models of automotive water Frederick were mechanical, externally mounted using coils and contact points which wore out and when they did there was a possibility of the battery being overcharged. These were replaced by what are called electronic, solid-state Voltage Regulators, in that they use less power and turn on and off about 7000 times per second. In today's Chevrolet Metro cars Voltage regulator is a part of the computers and most of the computers are inbuilt in the alternator and the PCM replaces the Voltage Regulator function because it controls and considers many factors to control the charging system output.
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