The document discusses a single phase semiconverter circuit used in power electronics. It contains a half bridge configuration with two SCRs and two diodes connected in a bridge. During the positive half cycle, SCR T1 and diode D2 conduct to deliver power to the load. During the negative half cycle, diode D3 and SCR T4 conduct. Waveforms and examples with resistive, inductive, and resistive-inductive-emissive loads are provided.

1. Name : Raviraj solanki
Enrollment no: 150990109011
Branch : EE(5th )
Subject : Power Electronics - 1
Topic : Single Phase Semiconverter

2. SINGLE PHASE
SEMICONVERTER

3. INTRODUCTION
Converter

Rectifier circuit
Uncontrolled Rectifier circuit
Controlled Rectifier circuit

4. SEMI CONVERTER
It is a single quadrant converter.
It has only one polarity of output
voltage and current.
Here two SCRs and two diodes are
connected in bridge configuration.
They can be arranged in two
confg. namely symmetrically &
asymmetrical.

5.  SINGLE PHASE SEMICONVERTERS
(HALF BRIDGE CONVERTER)
 Assume, load is highly inductive
CASE I
T1
T4
D3
D2
LOAD
A
B

6. SINGLE PHASE HALF CONTROLLED BRIDGE
 DUE TO POSITIVE HALF CYCLE
T1
D2
A
B
α to π
•T1 and D2 are conducting
•T4 and D3 are in reverse bias mode

7. SINGLE PHASE HALF CONTROLLED BRIDGE
 DUE TO NEGATIVE HALF CYCLE
D3
T4
A
B
•D3 and T4 are conducting
• D2 and T1 are in reverse bias
mode

8. SINGLE PHASE SEMICONVERTER
WITH R LOAD

9. SINGLE PHASE SEMICONVERTER
WITH R-L LOAD

10. WAVEFORM

11. SINGLE PHASE SEMICONVERTER
WITH R-L-E LOAD

12. WAVEFORM

14. OUTPUT VOLTAGE