改進型全橋逆變電路的研究

摘要：提出一種改進型全橋逆變電路結構，在全橋電路兩橋臂之間跨接一個儲能電感，采用單周期的控制策略，配合極性控制，實現輸出交流電壓幅值可調，能夠適應寬的電壓范圍，且結構簡單。詳細分析了改進型逆變電路的工作原理，并推導了系統單周期控制下的小信號模型，通過對系統進行閉環設計，實現了輸出電壓的精確調節。仿真和實驗結果證明了此方案的有效性。 敘詞：全橋逆變器，單周期控制，小信號建模，閉環設計 Abstract：An improved full-bridge structure with a jumper inductance is proposed. It can adapt to the wide voltage range and the outputvoltage is adjustable with one-cycle and polarity control. Meanwhile, the structure is very simple. Then the operation principle is analyzedin detail, and the small signal model is derived. In order to realize the exact regulation of the output voltage, the closed-loop is designed.Finally, the strategy is confirmed to be effective by the results of simulation and experiment. Keyword：Full bridge inverter, One-cycle control, Small signal modeling, Closed-loop