Since 1966, power semiconductor's products have been in service in a variety of applications all over the world for several decades. Nowadays, power semiconductor devices play an important role in modern power electronic apparatus.
Power semiconductor devices are semiconductor devices used in power electronic converters in the form of on-off switches. They can work in different ways:
1. Rectifier: converting power from ac to dc;
2. Inverter: converting power from dc to ac;
3. Ac Controller: converting power from ac to ac at the same frequencies;
4. Cycloconverter: converting power from ac to ac at different frequencies.
