The single-phase full-wave ac voltage controller in Figure 9-1 has a resistive load of R = 3.5 Q2 and the input voltage is Vs = 120 V (rms), 60 Hz. The delay angles of thyristors T1 and T2 are equal, α1 = α2 = α = π/6. Calculate the performance parameters. Assume ideal thyristor switches. 1. the rms output voltage Vo 2. the input power factor, PF 3. the average current of thyristors, IA 4. the rms current of thyristors, IR Figure 9-1 Single-Phase AC voltage controller σ+ Vs T₁O DY + T₂ io R Vo -