Voltage Regulator

02 Feb 2017

Voltage Regulator

Voltage regulators are used to regulate, modify or stabilize the output voltage of an alternator or dynamo motor, at the required value. In principle, a voltage regulator is a voltage stabilizer which mechanically stabilizes the ongoing voltage level and keeps it constant at that level despite changes in the supply voltage and load current. A voltage regulator circuit may also be used to modify the voltage level, in accordance with the requirement of the circuit.
 
The Zener diode, a reverse breakdown voltage operational diode supplies a stable voltage reference supply to the voltage regulators. Besides keeping the DC output voltage constant, a voltage regulator has other functions too-  it blocks the AC ripple voltage which cannot be blocked by a filter. A well- engineered voltage regulator may also have extra circuits for defense like short circuits, current limiting circuit, thermal conclusion and over-voltage protection.

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