數字控制級聯式雙向DC-DC變換器的研究

摘要：本文對由Buck/Boost 雙向變換器與雙向半橋直流變換器構成的級聯式雙向DC-DC變換器的原理進行了分析，并研究了一種適用于Boost變換器的無源軟開關電路。在數字控制的硬件平臺之上,提出一端穩壓和一端穩流的控制策略，可實現能量雙向流動的自由轉換。最后給出了實驗波形，從而對理論分析進行了驗證。 敘詞：雙向DC-DC變換器 無源軟開關 數字信號處理器 控制策略 Abstract：Two-stage Bi-directional DC-DC Converter which was composed of Buck/Boost BDC and bidirectional Half-Bridge DCT was described , a novel reactive-soft-switching boost converter was also introduced in this article. An experimental prototype of bidirectional DCDC converter controlled by DSP is designed. A novel control scheme adopting one port voltage regulated and another port current regulated is proposed to realize the energy conversion in bi-directional freely. In the last, experimental waves verify the theory. Keyword：Bi-directional DC-DC Converter; novel reactive-soft-switching; digital signal processor; control strategy