An improved resonant converter for long-pulse generation in high-energy physics applications

This paper presents a novel three-single phase resonant converter topology for long pulse modulators in high-energy physics applications. The proposed converter generates a flat top pulse voltage that lasts one millisecond. Each single phase can be operated with independent frequency and phase shift. Based on that, the whole converter has a strong ability of rejecting resonant tank unbalances. A Repetitive type control stragegy has been used resulting in pulse high dynamics performance and reduced overshoot, which satisfy the system specifications. The soft-switching, zero current switching (ZCS), is ensured by combined frequency and phase control at full power in all IGBTs.