Proposed by Mr. KAMDEM Paul

REPUBLIC OF CAMEROON REPUBLIQUE DU CAMEROUN

Peace - Work – Fatherland Paix – Travail - Patrie

THE UNIVERSITY OF B AMENDA UNIVERSITE DE BAMENDA

COLLEGE OF THECHNOLOGY

COLTECH-B AMENDA

Exercise I: Give a brief answer to the following questions

1. What is the meaning of : SCR. PIV. IGBT, GTO thyristor.

2. State the main difference between full wave and halfwave rectifiers

3. Draw the two transistors equivalent circuit of the Thyristor and explain why it can he

considered as a bidirectional component in term of voltage.

4. What is the main advantage of the full diodes bridge rectifier over the center-tap

rectifier?

5. Let’s consider the following i-v characteristics

5.1. What is the corresponding component?

5.2. Gives the corresponding idealized i-v characteristics.

Exercise II

Let’s consider a full-wave fully controlled single phase rectifier with a purely resistive

load R-100Ω. The primary voltage is 230V-50Hz and the transformation ratio k=0.025.

The firing angle of thyristors is considered as =

/4.

1.

Draw the corresponding diagram

2.

Draw the waveforms of the load voltage and the voltage across each thyristors.

3.

Calculate the average value (V