研究目的
Designing a new series hybrid DC-DC converter for communication power supply with wide input range using Silicon Carbide (SiC) power transistor to achieve high efficiency and power density.
研究成果
A SiC based 48V, 10A DC-DC power converter is designed and demonstrated for universal communication power supplies with wide input range from 100V to 450V. The proposed series hybrid topology combines forward and flyback converter sharing the same power switch, achieving decent efficiency, simple converter design and architecture, and high power density.
研究不足
High voltage stresses and high conduction loss are two major disadvantages of the proposed design. Advanced diode techniques as well layout and thermal management need to be explored to further improve the performances.
1：Experimental Design and Method Selection:
The proposed hybrid converter combines forward and flyback converter with a resonant network for soft switching.
2：Sample Selection and Data Sources:
A 48V/10A DC-DC converter is designed for communication power supply with wide input range from 100V to 400V.
3：0V. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: SiC power transistor, transformer with turns ratio of 33:4:24, resonant capacitor.
4：Experimental Procedures and Operational Workflow:
The converter operates under both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) depending on the load current.
5：Data Analysis Methods:
The transfer function of the proposed topology is analyzed to determine the boundary between CCM and DCM operations.
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