NOVEL COMMUTATION TECHNIQUE OF AC-AC CONVERTERS

The AC-AC converter called the matrix converter is vel-v simple in str ucture and has powerful controllability. However, to date there have b een few practical applications, especially in power electronics fields . One of the major reasons is the commutation problem. The paper propo ses a novel commutation technique which is very simple to implement. T his commutation scheme allows the dead time to avoid current spikes of nonideal switches and at the same time establishes a current path of the inductive load to avoid voltage spikes. Experimental results obtai ned on a 5 kW prototype are discussed.