Basic Forced-Commutated Inverters and Their Characteristics

In connection with the ever increasing applications of static inverters in the area of uninterruptable power systems and variable frequency ac motor drives, and the many forced-commutated inverter circuits that are proposed for these applications, an endeavor has been made to classify the impulse-commutated inverter circuits and to compare their characteristic features with each other. To attain this, the basic commutation circuits were considered generally, but yet varied enough to make some conclusions. Although there are but a few basic ways to insert a commutation impulse source in the forced-commutated inverter, many variations are possible, which make the design of inverters a difficult matter and very dependent on the desired specifications and the available components.