LO2 - Question 3 - Rectification Flashcards
1
Q
What is a half-wave controlled rectifier?
A
A half-controlled rectifier is a bridge rectifier that uses 2 SCR’s and 2 diodes for a single phase bridge, and 3 SCR’s and 3 diodes for a 3-phase bridge.
Half-controlled were mostly used when SCR’s were more expensive than diodes.
2
Q
What is a Full-Wave Controlled Rectifier?
A
A full-controlled rectifier uses SCR’s for all control elements;
Single-Phase Bridge: 4 switches
Three-Phase Bridge: 6 switches
3
Q
When is a Full-Wave Controlled Rectifier Circuit used?
A
A full-controlled system is used when supplying power to a motor which sometimes generates reverse currents.
