Question

For a single phase, full bridge, diode rectifier excited from a 230 V, 50 Hz source. With R = 10 Ω & the inductance(L) large enough to maintain continuous conduction, the value of the supply power factor will be

(a) 0.707 lag

(b) 0.9 lag

(c) 0.86 lag

(d) Unity

This question was posed to me in unit test.

This key question is from 1P-Diode Rectifier FW-2 topic in chapter Diode Rectifiers of Power Electronics

Answer 1

Right choice is (b) 0.9 lag

The explanation: Pf = Vs.Is.cosθ/Vo.Io

 Io = Vo/R A

Vo = 2Vm/π Volts.