Practical design methodology of auxiliary resonant snubber inverters

This paper describes the design methodology for auxiliary resonant snubber inverters including Δ- and Y-configured auxiliary resonant snubber inverters. The design emphases are resonant circuit components including inductor, capacitor, end switch, DC link capacitor, and control technique. Design optimization can be aimed at high efficiency, high frequency, low dV/dt, or compact size. An example of designing a three-phase 100 kVA unit is described step by step. Hardware implementation and experimental results are shown for verification