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This paper outlines a soft-switching mechanism based on zero-voltage-zero-current-switching (ZVZCS) principle for the front-end isolated DC/DC converter of a isolated three-phase rectifier-type high-frequency-link (RHFL) bi-directional power converter. In conjunction with a back-end AC/AC converter operating with a novel patent-filed hybrid modulation scheme outlined in [1], [2] that reduces the number...
This paper is going to develop two soft switching DC-DC converters based on the half-bridge inductive converter for the design of the power electronic interface for fuel cell applications. One operates in ZVS mode, another in ZCS mode. The ZVS converter can overcome the drawbacks of the original structure but is more complicated. The ZCS converter can't operate at the duty cycle less than 0.5 but...
Converter transient response is mainly limited by filter LC delay time, controller delay time and propagation delay time. It is a tradeoff between efficiency and transient response in the design. In isolated DC/DC converter, the bandwidth of opto-coupler has an extra strong effect on the system bandwidth improvement. This paper presents current injection method, switching mode current injection circuit...
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