Uncontrolled Rectifier
Only diode are used
Trigger circuit are not required
Firing angle is fixed and always zero
It is used as low power rating
Application: Dc power supply for constant DC supply requirement
Controlled Rectifier
Only SCR or SCR and diode are used
Trigger circuit are required
Variable firing angle
It is used at medium and high power rating
Application: Dc motor speed control,DC traction system,heating control
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