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In high-power applications, paralleling three-level T-type converters (3LT2Cs) with common ac and dc sides represents a modular solution for overcoming limitations of active switches. However, when independent space-vector pulse-width modulation (SVPWM) is employed, zero-sequence circulating currents (ZSCCs) will emerge. Especially, the use of three-phase three-limb inductors (3P3LIs) without additional...
Against conventional wisdom, asymmetrical interleaving strategy is proposed for two-phase interleaved LLC resonant DC/DC running at the same switching frequency to guarantee the equilibrium point of current sharing under all operation condition. Basing this strategy, adaptive-voltage-positioning (AVP) concept is further proposed for passive current sharing realization, while satisfying output voltage...
A previously proposed current fed multi-resonant converter (CFMRC) has the merits of low input current ripple, high step-up capability and high efficiency. However, in order to ensure zero-current switching (ZCS) of its secondary rectifying diodes, the switching frequency range is limited hence the voltage regulation range is limited. In this paper, the switching frequency range is broadened for the...
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