Quasi-Direct PWM AC-AC Converter Solution for AC Drives

摘要

The topology of the 37-Kw quasi-direct ac-ac converter consists of a three-phase voltage source converter, a small plastic film capacitor and a three-phase voltage inverter. Two control boards, based on the Dsmc (digital Smart Motion Controller) digital signal processor, were involved in the ac-ac system driving. They have been synchronizing through a fast serial link communication for real-time load power acquisition. The experimental test has been performed in order to show the ac-ac converter operation at distorted by 10% of 5-th harmonic supply line voltage.%Opisano quasi-bezpo?redni 37 Kw konwerter AC-AC sk?adaj?cy si? z trójfazowego ?ród?a napi?cia, cienkowarstwowego kondensatora i trójfazowego przekszta?tnika. Dwa procesory sygna?owe Ssmc (digital Smart Motion Controller) w??czono w uk?ad sterowania. Ich rol? jest synchronizacja systemu nap?du w czasie rzeczywistym. Eksperyment wykaza? ?e jedynym zniekszta?ceniem jest obecno?? 10% pi?tej harmonicznej.