Evaluation of Half-Bridge Resonant Inverter Topologies

Özet

Resonant power inverters are widely used in today’s power electronic industry due to their high efficiencies. Thesehigh efficiencies are the result of operating the inverters in either zero current switching (ZCS) or zero voltage switching (ZVS) modes. Although there are many topologies available, the majority of them are mainly derived from two basic structures called “the voltage source series resonant” and “the current source parallel resonant”type inverters. Both inverter topologies incorporate full bridge and half-bridge circuit variations. In this paper, the half-bridge type of series and parallel resonant inverters are investigated. A comparison between the two types -with respect to practical applications -is also presented. Analytically derived results are compared against experimental measurements for two prototypes. Specifically, an 80 kVA half-bridge series resonant and a 3kVA half-bridge parallel resonant type induction heating supplies are being compared.At the end of the study, a detailed comparison table was introduced to the literature.