b) A 400 V/50 Hz three-phase system is loaded with an ideal three-phase diode rectifier having a completely smooth output current of 50 A. An ideal three-phase thyristor converter is connected in parallel with the diode rectifier. The output current of the thyristor converter is also 50 A and completely smooth, but the output power of the thyristor converter is zero. i. ii. i. Draw the waveforms of the input currents to the two converters and the the sum of the two currents. c) The shown converter in Figure 1 operates in continuous conduction mode. Assume the components are ideal. ii. Calculate the power factor for the total load. + Vo (t) Vg (t) io (t) R = in (t) D KH ic (t) i (t) + v (t) - Figure 1 Sketch of i(t) and VL(t) for one switching period Ts. is (t) Determine the DC voltage gain Vo/Vg as function of duty cycle, D.