Cycloconverters

A cycloconverters is a device which converts ac power at one frequency into ac power at different frequency without an intermediate dc link. A cycloconverter is also called a cycle converter or frequency changer. In a cycloconverter, the output frequency and voltage can be changed independently and continuously with the help of control circuits.

Cycloconverters are classified Based on the frequency

cycloconverter
cycloconverter

STEP DOWN CYCLOCONVERTER

In which frequency obtained at the output is less than supply frequency.

STEP UP CYCLOCONVERTER

In this output, frequency is more than supply frequency.
Cycloconverter is used to control the speed of induction motor or synchronous motor. It is basically used to provide a variable frequency power from a fixed an input power or a fixed frequency. ower from a Variable frequency power. Other applications of a cycloconverter include:
  1. Induction heating
  2. Connecting two grid, operating at different frequencies.
  3. Used in variable speed constant frequency system (V SCF system), where constant frequency output is obtained from variable speed alternator. ‘
  4. Static VAR compensator (SVC)
  5. 5. Ruggedness and compactness of cycloconverter make it suitable for power supply in aircraft.
  6. 6. Used in Gearless ball and cement mill drives.
The cycloconverter can convert power from a single phase supply or a. three phase supply, producing either a single-phase or three-phase power.

Cycloconverters are classified

  1. Single phase cycloconverter 
  2. Three phase cycloconverter 
Types of Cycloconverters:
Types of Cycloconverters:

 

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Comparison between VSI and CSI

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