What is the difference between a cycloconverter and an inverter?
A cycloconverter directly converts AC to AC without DC link whereas an inverter converts DC to AC with an intermediate DC stage.
What is the principle of operation of a cycloconverter?
It employs phase commutation by sequentially switching on thyristors of the two arms - positive and negative, to synthesize the output waveform from segments of input waveform at a controlled rate.
Why is a step down cycloconverter more commonly used than step up type?
Step down cycloconverter works on natural commutation principle without need for forced triggering. Also, applications majorly require reducing output frequency versus enhancing it.
What is the maximum speed regulation range provided by cycloconverters?
Cycloconverters can regulate motor speed from zero to slightly above rated synchronous speed, typically within a range of 4:1.
How many semiconducting devices are required in a three-phase cycloconverter?
A typical three-phase cycloconverter would require around 32 thyristors/IGBTs to fully convert the input AC waveform into the desired output.