Abstract
The purpose of this paper is to improve power conversion efficiency of three-phase voltage-source type soft-switching inverter with a single auxiliary resonant DC link (ARDCL) snubber. In the first place, the operating principle of an ARDCL snubber discussed here is described. In the second place, this paper proposes an effective generation scheme of zero voltage space vector of three-phase soft-switching inverter using IGBTs that can reduce power losses in the ARDCL snubber treated here. In particular, a zero voltage holding interval in the DC busline of this soft switching inverter is to be regulated due to, the generation scheme of zero voltage space vector. In the third place, the maximum modulation depth Mmax under the condition of compensation of space voltage space vector can be improved by using a new zero voltage space vector generation scheme. Finally, the feasible experimental results to confirm the operating characteristics such as power conversion efficiency, THD and RMS value of output voltage for three-phase voltage-source type soft-switching inverter using IGBTs is concretely implemented and evaluated from a practical point of view.
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