Steady-state analysis of class-E shunt inductor inverter outside ZCS and ZDCS conditions
Ali Lotfi, Akihiko Katsuki, Fujio Kurokawa, Hiroo Sekiya, Marian K. Kazimierczuk, and Frede Blaabjerg
IEEE Transactions on Components, Packaging and Manufacturing Technology, vol.9, no.8, pp.1587-1594, Aug., 2019. [pdf document]

<Abstract>

The class-E shunt inductor inverter (SII) topology typically operates based on zero current switching (ZCS) and zero derivative current switching (ZDCS) conditions. Based on these terms, the peak switch voltage and load-resistance are eliminated as major limitation parameters to implement of the class-E SII with the desired design specifications. This paper introduces the design and analysis of the class-E SII with the specified deviation from both ZCS and ZDCS conditions. Therefore, two degrees of the design freedom are obtained. Two new parameters that are normalized by the dc-supply current are defined in terms of the deviation from ZCS, i.e., α and ZDCS, i.e., β. This operation-mode of class-E SII is named as the non-zerocurrent (NZC). The performance characteristics and design relationships are obtained in terms of the phase-shift between the input and output voltage. The demonstration of the proposed operation-mode is proved by fabricating of a prototype circuit with output power 10-W at 4 MHz operating frequency, and closely agreement between experimental outcomes with simulation and theoretical results.