Challenge

Project 1

SSuraj Chouriya6 Jan 2023

Part A:

The three-phase diode rectifier is supplying approximately 2.2 kW load with VLL=208V at 60 Hz, Ls=1 mH and Cd=1100 μF, where Cd is the DC side capacitor. Design the circuit in one of the simulation platforms (MATLAB or Ltspice/Simetrix) and obtain the circuit waveforms. Based on their simulation studies find out the following:

Diode Current = 40 amp

Diode Voltage

as per simulation result diode having current arround 40 amp and voltage arround 380 Volt

here we need to choose more than than simlation value so IDP30E65D1 of infineon model is suitable for this application all values having under the limit current rating 65amp and blocking voltage 650 Volt

Average dc voltage output, peak-to-peak ripple, the input current THD, DPF and PF and average dc current. Also give the selected devices with justification

the input current THD

DPF = cos(0.2);

DPF = 0.980066577841242

Is1 = 32.7;

Is =sqrt((46.25)^2+(17.82)^2+(11.46)^2);

Is = 50.871863539681730

Df = Is1/Is;

Df = 0.642791471055369

pf = Df*DPF

pf = 0.629978437302773

Average dc voltage output

peak-to-peak ripple of out put Voltage

379-372 =7 volt

average dc current 35 amp

Part B:

A three-phase thyristor converter is supplied by 480V (line-line), 60 Hz source. Its internal inductance Ls1=0.2 mH. The converter has a series inductance Ls2=2.0 mH. The load is represented as RLE load with Ld=5 mH, rd=0 and Ed=600V and the delay angle is α=20°. Using the simulation obtain vs, is and vd waveforms and calculate Is1, Is, DPF, PF and % THD. Also give the selected thyristor based on the simulated studies with proper justification.