This document discusses cycloconverters, which are devices that convert input power at one frequency to output power at a different frequency in a single stage. It describes the types of cycloconverters including step up, step down, single phase to single phase, and three phase. It provides details on the principles and operation of single phase cycloconverters including mid-point and bridge types for step up and step down conversion. It also discusses three phase to single phase and three phase to three phase cycloconverters. Applications mentioned include speed control drives and induction heating.

1. SUBMITTED TO:- SUBMITTED BY:-
MR. PARVEEN MALIK (LECTURER) AKSHAY PARMAR
MR. AJAY JAISWAL (LECTURER) (1509160)
MS. ANU SAINI (LECTURER) ECE
SEMINAR ON
CYCLOCONVETERS

2. CONTENTS
INTRODUCTION
TYPES
PRINCIPLE
SINGLE PHASE CYCLOCONVETER
THREE PHASE CYCLOCONVERTER

3. CYCLOCONVERTER
A Device which converts input power at one frequency
to output power at a different frequency with one-
stage conversion.
AC to AC conversion
Developed in 1930 , GERMANY
Uses SCR (THYRISTORS)
Force commutation

4. TYPES
Step up cycloconverter ( Fo>Fs )
Step down cycloconverter( Fo<Fs )
Single phase to single phase
 Mid-point cycloconverter
 Bridge type cycloconverter
Three phase cycloconverter

5. SINGLE PHASE CYCLOCONVETER
Step up Cycloconverter:-
 LOW Frequency to HIGH Frequency
Step down Cycloconverter:-
 HIGH Frequency to LOW Frequency

6. STEP-UP CYCLONVERTER
LOW TO HIGH FREQUENCY CONVERTER
 MID-POINT CYCLOCONVERTER
 BRIDGE TYPE CYCLOCONVERTER

7. MID-POINT CYCLONVERTER

8. BRIDGE TYPE CYCLONVERTER

9. STEP-DOWN CYCLONVERTER
HIGH TO LOW FREQUENCY CONVERTER
 MID POINT CYCLOCONVERTER
 BRIDGE TYPE CYCLOCONVERTER

10. MID-POINT CYCLONVERTER

11. BRIDGE TYPE CYCLONVERTER

12. THREE PHASE CYCLOCONVERTER
THREE PHASE TO SINGLE PHASE
THREE PHASE TO THREE PHASE

13. THREE PHASE TO SINGLE PHASE

14. THREE PHASE TO THREE PHASE

15. ADVANTAGES DIS-ADVANTAGES
Direct conversion
Compact system
Variable speed range
High quality wave
Low speed applications
Large number of thyristors
Complex circuitry
Output frequency is limited
FEATURES

16. APPLICATIONS
SPEED CONTROL DRIVES
INDUCTION HEATING
VARIABLE FREQUENCY INPUT AND GETTING CONSTANT
OUTPUT

17. THANK YOU !!