Teaching TN TRB EE Test Series Power Electronics and Drives Phase Controlled Rectifiers Three Phase Converters Using Diodes
A 3-phase full bridge diode rectifier is fed from delta-star transformer. The voltage fed to the rectifier has a maximum value of V2 from line to neutral so that the voltage of phase ‘a’ is Va = Vm sin ωt. The phase sequence is a-b-c. At the instant the phase ‘a’ voltage is passing through zero, what will be the rectifier output voltage?
1
Zero
2
Vm
3
\(\sqrt 2 \;{V_m}\)
4
\(\sqrt 3 \;{V_m}\)