Q2: For the single phase full wave semi controlled rectifier shown: 1-Draw the v-i waveforms for the circuit Vm 2-Prove that : lavs (1+cos a) 3-Maximum voltage across the load if the AC supply voltage is 208V.

A. Define Commutation. List the method of commutation and explain the external plus commutation method in details. B. Find an expression for output dc voltage in single phase fully controlled thyristor rectifier taking the effect of source inductance into consideration.

Consider the full-wave rectifier circuit shown below, where• vS(t) is a sinusoidal signal with a peak value (Vs = 5 V).• Diodes are modelled using constant voltage model with VDO = 0.7 V• The ac line voltage has an rms value of 120 V and a frequency (f) = 60 Hza) Calculate the transformer turns ratio.  b) Plot in the same graph signal vS(t) and the output signal vO(t) versus time (t) (show all details including amplitudes, time instances, etc.) c) Calculate the rms value of the output signal vO(t). (hint: sin2(x) = 0.5(1- cos(2x)))  d) If a capacitor C=3.58 F is connected across R = 10 k, repeat (b) in a new graph