1. POWER SEMICONDUCTOR SYSTEMS I Author: Ales Havel E-mail: ales.havel@vsb.czales.havel@vsb.cz Phone number: 4287 Headquarters: E227 Web page: http://homen.vsb.cz/~hav278/

2. Presentation contents  Main types of converters  AC-DC converters  DC-DC converters  DC-AC converters Voltage inverters Single phase inverters Three phase inverters Current inverters Single phase inverters Three phase inverters  AC-AC converters

3. Power converters  A power semiconductor converter is an electrical device for converting electrical energy.

4. Single phase voltage inverters

7. Three phase voltage inverters

9. Example The three phase inverter is supplied from the DC-link voltage U d = 540V. Calculate the RMS value of the output phase and line voltages if the control angle Ψ = 180°. Solution: a)phase voltage b)line voltage: c)conclusion:

10. Thank You for your attention