本論文提出一種利用功率變壓器上之驅動繞組及反向驅動器設計一新型自激式同步整流驅動電路及其對偶電路。同步整流器之驅動信號與功率開關之閘極信號為互補，以防止同步整流器之本體二極體導通，消除反向恢復所引發之問題。此驅動電路適用於對稱橋式及推挽架構，作為低電壓大電流之應用。此外，此驅動繞組經整流、濾波之後亦可提供次級側週邊電路所需之電源。文中並設計一部自激式同步倍流整流對稱半橋電源轉換器，其輸入電壓為36~72V，輸出為1.65V/50A，實驗結果顯示轉換器之最高效率可達86.98%，由此證明此電路之優異特性。

A new self-driven synchronous rectification scheme, which utilizes the inverting circuit and auxiliary winding in power transformer and achieves synchronous driving, is proposed. The driving signal for synchronous rectifiers is complementary to the gate signal of power switches, which prevents the body diode of synchronous rectifiers from conducting. As a result, eliminating the problem caused by the reverse recovery. The driving scheme can be applied to half-bridge, full-bridge, and push-pull converters and is preferred in low voltage high output current applications. In addition, the driving scheme also provides extra power source required for the secondary peripheral circuit. Various driving schemes have been comparatively studied. The design methods for magnetic components and power devices are given. A symmetrical half-bridge converter with self-driven synchronous current doubler rectification with input voltage range 36~72V and 1.65V/50A output is experimentally performed. The maximum efficiency is 86.98 %, which demonstrates the performance of the proposed technique.

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