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Abstract: This paper presents a novel prototype of the three~phase bridge power block module type auxiliary resonant AC link snubber circuit, which is effectively used for the three-phase voltage source type sinwave soft switching PWM inverter lising IGBTs Its operating principle is described for current source load model, along with its practical design approach based on the simulation data The performance evaluations of the three-phase voltage source type sinewave soft switching PWM inverter incorpoiating a single three-phase bridge module of active auxiliary resonant AC link snubber treated here is illustrated, which is concerned with power quality efficiency power loss analysLs This inverter is discussed a compared with those of the three-phase voltage source type sinewave hard switching PWM inverter The power loss analysis of this soft switching PWM inverter using IGBT power modules is evaluated on the basis of the measured V-I characteristics and switching power losses of IOBT, and antiparallel diodes The practical effectiveness of this inverter is proven by the power loss analysis for distributed power supply

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Abstract

1.INTRODUCTION

2.RESONANT AC LINK SNUBBER CIRCUIT

3.PARAMETER DESIGN METHOD OF RESONANT SNUBBER CIRCUIT

4.THREE-PHASE VOLTAGE SOURCE TYPE SOFT SWITCHIG INVERTER USING IGBTs

5.SIMULATION RESULTS AND EVALUATIONS

6.EFFICIENCY EALUATION UNDER MEASURED CHARACTERISTIC DATA

7.CONCLUSIONS

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UCI(KEPA) : I410-ECN-0101-2009-560-014248480