Single phase half wave converter drives

• A single phase half wave converter drive a shown in the figure. A separately excited dc motor, fed through single phase half wave converter, as shown in the figure.
• In this converters, motor field circuit is fed through a single phase semiconductor in order to reduce the ripple content in the field circuit.
• So in a single phase, half wave converter feeding a dc motor offers one quadrant drive.
• For a single phase half wave converter, average output voltage of converter the voltage V₀  = armature terminal voltage. Vt is given by,

                              V₀ = V_t = V_m / 2∏ * ( 1+  Cos ɖ )    for 0 < ɖ <  ∏

Where V_m = maximum value of the source voltage

For single phase semi converter in the field circuit, the average output voltage is given by 

                                            V_f   =  V_m / ∏ * ( 1+  Cos ɖ )  0 < ɖ₁  <  ∏

Single phase half wave converter drive