諧振轉換器已被研究多年，其中，LLC諧振轉換器最為流行，並已廣泛應用於不同的應用領域。隨著電力電子的發展，為提供高壓母線及儲能設備間穩定的電力，LLC諧振轉換器逐漸發展成雙向CLLLC諧振轉換器。脈衝頻率調變是常用的控制方法，工作頻率須隨著輸出負載的不同而變化，這會使元件設計更加複雜，同時也會導致參數不匹配的問題。因此，為解決上述問題，本文使用相移調變作為控制方法。諧振元件可以根據固定的工作頻率設計，使設計過程更簡單。充電模式以一次側相移調變控制，藉由輸入側之兩臂之間的開關相移角度來調節輸出電壓。放電模式以二次側相移調變控制，藉由變壓器二次側之底部開關對一次側開關的相移角度來調節輸出電壓。且受控的開關都能達到零電壓切換，輸出端的開關也能達到零電流切換的操作。本文研製一種採用混合相移控制方法之雙向直流 CLLLC諧振轉換器。其諧振頻率為100 kHz，其高壓端電壓為200 V，低壓端電壓為48 V，額定功率為1 kW。

LLC resonant converter is the most popular resonant converter topology characterized with soft-switching and applied in various applications for high power conversion efficiency. For bidirectional power conversion in the power system integrated with energy storage devices, conventional LLC converter was developed into bidirectional CLLLC resonant converter. Pulse-frequency modulation (PFM) is commonly used control method for regulating the output of resonant converter. But, the output regulating performance is highly affected by the resonant circuit components that increases the design complexity. To solve the aforementioned problem, phase-shift modulation (PSM) is used in this thesis. By applying the PSM, resonant components may be designed for the fixed operating frequency to make the design process simpler. Using primary-side phase-shift modulation (PSPSM) control for charging mode, phase-shift angle of the switches between two legs in input-side is varied proportional to the change of output load. And secondary-side phase-shift modulation (SSPSM) control is applied to discharging mode. Phase-shift angle of the bottom switches in output-side is inversely proportional to the output load variation. And zero-voltage switching (ZVS) for the controlled switches and zero-current switching (ZCS) for output rectifiers without additional circuits can be achieved. In this thesis, a bidirectional DC-DC CLLLC resonant converter with hybrid phase-shift control is realized. High-side DC bus voltage is 200 V, low-side battery voltage is 48 V, resonant frequency is 100 kHz and rated power is 1 kW.

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