Three-phase full-wave controlled rectifier Circuit with inductive load.

 In this article, you will learn about the 3-Phase full wave controlled rectifier circuit. In this circuit load is an inductor and the output wave is full-wave. Full-wave is generated by controlling the firing angle of SCR.

What is silicon controlled rectifier(SCR)?

Silicon controlled rectifier is three-pin four layers current-controlling device. Its one pin is used for firing. Firing is a control angle on which angle an SCR is in on condition. Once SCR is on by applying power on the firing angle pin it will remain on condition until power is cut-off.

SCR is used to make the control rectifier circuits whether it's a full-wave or half-wave rectifier.

 Here is the symbol of SCR.

In my designed circuit I used six SCR and 3-phase AC supply. 

WORKING PRINCIPLE

The working principle of the circuit is that there is 6 SCR but every SCR doesn't conduct the flow of current at one time. Only Two SCR can conduct the current at a time and generate the out. First Cycle T1 & T2 conduct and other SCRs will in off condition then in second cycle T3 & T2 will conduct and others will in off state and in the third cycle T5 and T4 will conduct. In that way, SCR will conduct and generate the full waveform of the control Rectifier.

T1 & T6 firing angle is 0 45.

T3 & T2 firing angle is 45 90.

T5 & T4 firing angle is 90 135.

Component List

1> Six SCR

2> Inductor 30h

3> 3-phase 24v 50hz input

Simulation Control setting values

Total Time = 0.1

Print Time = 0.001

Print Step= 2

OUTPUT WAVE