Novel Resonant Transition PWM Inverters: Synthesis and Analysis

This paper presents a generalized concept concerning the resonant transition technique. It is based on the resonant transition mechanism requirements, i.e, on the auxiliary circuit functionality. The proposed resonant transition concept permits to newcomers to perceive the resonant transition techniques as a whole instead of dissimilar soft-switching techniques. Furthermore, by means of this concept a unique methodology to analyze and synthesize the resonant transition converters is developed. The easy assessment of the resonant transition needs makes possible the development of novel resonant transition topologies with improved characteristics. The paper focuses on zero-current transition (ZCT) and zero-current-zero-voltage transition (ZCZVT) inverters, which are suitable for medium and high power applications where minority carrier devices are predominant. Theoretical analysis is verified by means of experimental results obtained from laboratory prototypes rated at 1 kW, 40 kHz