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In this paper, a new three-phase current-fed bidirectional DC-DC converter is proposed. The topology integrates a three-phase boost converter with a three-phase galvanically isolated bidirectional DC-DC converter. Keeping dc bus voltage constant allows high efficient energy conversion over a wide input voltage and maintains ZVS conditions in the whole operation range. By using compact small inductance...
This paper presents a thorough study for current-fed dual half bridges (DHB) dc-dc converters over the whole operating range under phase-shift and duty cycle control. An optimized operating mode achieving minimum root-mean-square (rms) transformer primary current is derived in this paper under soft-switching conditions. The analysis and experimental results show that this operating mode has less power...
Based on the space vector PWM (SVPWM) strategy, this paper mainly focuses on the control method of neutral-point voltage balancing problem in three-level NPC PWM VSI inverter. A comprehensive mathematic model of three-level inverter is set up. Then, a simple neutral-point voltage balancing control method, which only requires the direction information detection of each phase leg's current and neutral-point...
This paper explores the mathematic model and control method of neutral-point voltage balancing problem in three-level NPC inverter. A comprehensive mathematic model of three-level inverter is established. Then, based on the space vector PWM strategy, a simple neutral-point voltage balancing control method, which depends on the direction information detection of each phase leg current and neutral-point...
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