Investigation and verification of a cascade double Γ-CL current source resonant inverter

The current soiircc resonant inverter (CSRI) is at the heart of inany systems and equipment (e.g. unintcrruptible power supply (UPS) and high-frequency annealing (H FA) equipment). Many topologies shown in open literal iirc are series resonant converters (SRC) and parallcl resonant converters (PRC) that consist of two or thrcc cncrgy storage clcnicnts. Howevcr, they have a number of limitations. Thcsc limitations of two- or/and threc- element resonant topologies can be ovciʹconie by adding a fourth cncrgy storage element. This paper introduces a cascade doLiblc r CL CSRI, which has very sniootli waveforms for output voltage and current, and a very low total harmonic distortion (THD) value. It effectively reduces the power losscs and largely increases the power transfer efficiency. Simulation and testing rcsults verified our design and analysis.