An Improved Quasi-parallel Resonant DC Link Inverter and Its Pulse Modulation

In this paper,an improvement is made on the novel quasi-parallel resonant DC link inverter.The individual inverter IGBT get its own local snub by shifting the resonant capacitors on its own.Its principle of operation and design methodology is discussed in detail.An optimal space voltage modulation is applied to the IQPRDCL inverter.The soft switching character is proved by the simulation and experiment.