This document discusses single phase to single phase converters. It provides information on cycloconverters, including what they are, where they were first applied, their operating modes, types, circuit diagrams, analysis using resistive and inductive loads, configurations, applications, advantages, and limitations. Cycloconverters convert AC power to another AC output without an intermediate DC stage by synthesizing the output waveform from segments of the AC input. They were initially used in Germany to convert 3-phase 50Hz power to single phase for rail traction.

1. Gujarat Technological
University
Birla Vishvakarma Mahavidyalaya
Engg. College
Subject :-
Power Electronics (2161006)
Topic :- SINGLE PHASE TO SINGLE PHASE
CONVERTER
Prepared by:-
Kashyap Mandaliya (140083112008)
Guided by:-
Prof. Arjun Bambhaniya 4/9/2016Kashyap Mandaliya
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2. What is it about ?
 A cycloconverter (CCV) converts a constant voltage, constant frequency AC
waveform to another AC waveform of a lower frequency by synthesizing the output
waveform from segments of the AC supply without an intermediate DC link
 Invented in 1930’s
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3. Where it was first applied ?
 In Germany, where 3-phase 50hz supply was converted to a single phase ac suppy
at 16 2/3 for railway traction.
I/O waveform of a 16 2/3 hz cycloconverter 4/9/2016Kashyap Mandaliya
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4. Modes of Cycloconverter
 Blocking Mode:
 Depends on the polarity, one of the converters is enabled at a time.
 Circulating Current Mode:
 Both the converters operate at all time in this case.
 An intergroup reactor (IGR) is needed.
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5. Types of Cycloconverter
 Matrix cycloconverter
 Single –phase-to –single-phase cycloconverter.
 Three –phase-to-three-phase cycloconverter.
 Single-phase-to-three-phase cycloconverter.
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6. Circuit diagram &
Wave Forms
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7. Analysis using R-L load
 Discontinuous load current
 Continuous load current
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8. Discontinuous load current
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9. Continuous load current
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10. Bridge configuration single phase cyclo
converter
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11. Applications
 Cement mill drives
 Ship propulsion drives
 Rolling mill drives
 Ore grinding mills
 Mine winders
 Synchronous Motors
 Variable- speed, constant-frequency{VSCF} power generation for aircraft 400 Hz power
supplies.
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12. Advantages
 No intermediate DC state is required for AC-AC conversion.
 Extremely attractive for large power, low speed drives.
 Capable of power transfer in either direction between source and load.
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13. Limitations
 Large number of thyristors are required.
 The output frequency is limited to one-third of the input frequency.
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14. Conclusion
Cyclocnverters are basically used in the industry for ac-to-ac conversion. With
Recent device advances, power forms of cycloconversions are being developed.
In conclusion, cycloconverters are very vital especially to factory machines
that need ac-to-ac conversion where it is best applied.
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15. Thank you ! 
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