Single phase semicoverter drive

• To show in the figure, a separately excited dc motor, fed through two single-phase semi-converter, one for the armature circuit and the other for the field circuit, is shown in the figure. 
• Both converter 1, as well as converter 2, are connected to the same single phase source.
• This converter also offers one quadrant drive and it can be used up to about 15 kW dc drives.
• The waveform for current and voltage are sketched in the figure on the assumption of ripple-free armature current.
• Load voltage waveform for V₀  = V_t is the same as shown in the figure.

                                             V₀ = V_t = V_m/∏ * ( 1+  Cos ɖ )    

   for field circuit, V_f = V_m / ∏ * ( 1+  Cos ɖ₁ ) 

Single phase semi converter drive