[Q3]: Three-phase bridge rectifier supply's a resistive load with dc power of 200 kW; the ammeter reading is 60 A rms current, at supply frequency 50 Hz.
Determine:
1-the average and rms load voltage and current;
2-the diode parameters, efficiency and TUF;
3-the circuit inductance caused average voltage reduction with 4% of the average value;
4- find the average net voltage when phase C failed, and plot the output voltage for this case.
5- Now the voltage of C phase is restored but D2 failed.... determine the percentage dc voltage reduction.
Solution:
6- Now for fully restored system, derive a Fourier series for harmonic decomposition and build plot the relationship between Vmn=f(harmonic order).
