本文旨在完成具同步整流功能之非接觸式全橋式諧振轉換器研製，其用途為直流電源供給器，將靜止側的電能轉移至旋轉的或可動的裝置，不僅不需額外機械接觸，亦具有高效率的運轉性能。在諧振轉換器方面，採用全橋式變流器及高頻變壓器架構，其中高頻變壓器的一次側繞組為固定，二次側繞組及鐵心為旋轉。本文配合高頻變壓器的電感耦合模式配合全橋式變流器的切換頻率，以設計串聯電容值，使系統具有諧振以提高輸出功率，變壓器的二次側採用中心抽頭式同步整流器以取代二極體整流電路，減少二極體導通損失，提高提高整體的系統效率。
本系統以德州儀器公司出產的32位元之數位訊號處理器TMS320F280049作為控制核心，控制策略皆以C語言軟體完成；如此，可減少硬體電路，且具軟體因此相當有可塑性。高頻變壓器鐵心採用罐型高頻鐵粉心，以降低鐵心損，兩側的線圈由多股細絞線所組成以防導線集膚效應，降低高頻的導體電阻損失。本文完成輸出功率為500W的雛型，其實測結果在輸入直流電壓為40V，輸出直流電壓為30V～50V範圍，在輸出直流功率為520W時的效率為92.9%，諧振頻率為45kHz，在最高效率為96.5%時的輸出直流功率為256.5W，諧振頻率為29.7kHz。整體運轉的效率約為92.9%～96.5%，本文的轉換器具相當高的效率。

This thesis aims to complete the development of a contactless full-bridge resonant converter with synchronous rectification function, which is used as a DC power supply to transfer the electric energy from the static side to a rotating or movable device, without extra mechanical contact and with high efficiency operation performance. In the aspect of resonant converter, full-bridge inverter and high-frequency transformer architecture are adopted, in which the primary winding and iron core of high-frequency transformer is fixed, and the secondary winding and iron core are rotating. In this thesis, the inductance coupling mode of the high-frequency transformer and the switching frequency of the full-bridge inverter are matched to design the series capacitance value, so that the system has resonance to improve the output power. The secondary side of the transformer uses a center-tapped synchronous rectifier to replace the diode rectifier circuit, thus reducing the diode conduction loss and improving the overall system efficiency.
This system takes the 32-bit digital signal processor TMS320F280049 produced by Texas Instruments Company as the control core, and the control strategies are all completed by C language software. In this way, the hardware circuit can be reduced and the software has considerable plasticity. The iron core of high-frequency transformer adopts can-type high-frequency iron powder core to reduce the iron core loss, and the coils on both sides are composed of Litz wires to prevent the skin effect of wires and reduce the loss of conductor resistance at high frequency. In this thesis, a prototype with an output power of 500W is completed. The actual measurement results show that the efficiency is 92.9% and the resonance frequency is 45kHz when the input DC voltage is 40V and the output DC voltage is 30 V ~ 50 V, and the output DC power is 256.5W and the resonance frequency is 29.7kHz when the highest efficiency is 96.5%. The overall operation efficiency is about 92.9% ~ 96.5%, and the converter in this paper has quite high efficiency.

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