Calculate and draw the snubbing network for the scr if it

Question

1. An SCR has the following specifications:

• V_DRM = 800 V
• V_DSM = 1000 V
• I_TM  =  60 A
• I_TSM = 600 A
• dV/dt = 120 V/μS
• dI/dt =  100 A/μS
• I_DSM  = I_RSM =  70 μA
• C_j = 60 pF

Calculate and draw the snubbing network for the SCR if it is used in a single phase of a 480 V with a single phase circuit load of 12 kW.  Calculate components by the resonant method.

2. Draw and explain the best forced current sharing method for parallel SCRs.  Also explain why forced current sharing is necessary.

3. The circuit below has an input line voltage of 480 V rms, and a highly inductive load.  Calculate the output voltage at α = 45 ⁰, 90⁰, and 135⁰.

4. Repeat Problem 4 for the circuit shown below.

Answer 1

For the following specifications, consider all the details provided in the assignment, respond to the following questions. 1) An SCR consists of the given specifications: Compute and draw the snubbing network for the SCR if it is employed in a single phase of a 480 V by means of a single phase circuit load of 12 kW. Compute the components by resonant method. Q2. Draw and describe the best forced current sharing method for the parallel SCRs. As well describe why forced current sharing is essential. Q3. The circuit illustrated consists of an input line voltage of 480 V rms, and a highly inductive load. Compute the output voltage at a = 45 0, 900 and 1350.