Question: A half controlled Single Phase Bridge Rectifier is required to supply a smooth 150 V across a 10 Ω load when fed with a 230 V 50 Hz single phase supply.
(a) Sketch the circuit diagram of a half controlled rectifier capable of meeting this requirement.
(b) Calculate the firing angle required for this rectifier.
(c) Recommend a value of inductance that would provide suitable filtering for this rectifier.
(d) Sketch the input current waveform and calculate the rms input current of this rectifier when supplying 150 V to a 100 Q load.
(e) Calculate the power factor of this rectifier assuming that rectifier losses are ncgligiblc.
(f) Briefly explain two reasons why the power factor of this rectifier is less than 1.0.
The following formulae may be useful when answering question 3:
Vo = Vm(1+cos(α))/Π Is = Io√(Π - α)/Π