Control Issues of a ZCS Inverter

The Ishikawa and Murai zero current switching inverter offers promising characteristic for several applications. Nevertheless, to date the control issue was not yet fully addressed. The paper reviews the converter evidencing the nonlinearity, the load-filter resonance issue, and the resonant time duration. An equation for the forecasting of the resonant times is checked. Consequently, a modulator is proposed and described in detail, then verified experimentally. This paper finally proposes and verifies a vector control with active damping. An active damping control structure is defined, tuned, and verified by means of experimental tests taking into account several versions. Although this work does not fully address the control issue it evidences the control requirements of the converter and it is helpful in the converter evaluation and application.