The low voltage ac voltage ( S1 of T ) is applied to the pair of two SCRs, CR1 and CR2, connected antiparallel with in series RL. These are the main SCRs. As the SCR is being commutated at the crossover points of ac cycle,  but then it becomes a simple phase control circuit.Âmore...
The control of dc power in a load is carried out by two means, either by regulating it through a series resistance ( it may be in form of passive or an active device ) or by mean of pulsating currents such as chopper. The advantage of chopper upon series components is small loss more...
Silicon Controlled Rectifier In ac circuits the phase controlled rectifier can be turned on at any angle with respect to the applied voltage polarity. The angle a is oftenly called the firing angle. These circuits are characterized as controlled rectifiers or converters. In premore...