抑制單級功率因數校正變換器中電容電壓的方法

摘要：本文分析了單級功率因數校正變換器存在儲能電容電壓過高的內在原因，提出了抑制電容電壓應力的幾種方案，并進行了電路分析和仿真試驗。根據實驗和電路分析結果，串聯充電、并聯放電方案，電感電流臨界工作模式方案在抑制儲能電容電壓方面是兩種最優的解決方案。 敘詞：單級功率因數校正；儲能電容電壓；臨界工作模式 Abstract：The inherent reason of the high capacitor voltage stress of single stage power factor correction converter is analyzed, and then, several possible resolving schemes is discussed, finally some of practical implementation circuit topologies are given. Theoretical analysis and simulation results show that the both series-charging, parallel-discharging capacitors scheme and a novel boundary working mode are deemed to be more viable than the others methods.
Keywords: Single-stage power factor correction; Voltage stress of bulk capacitor; Boundary working-mode
Keyword：Single-stage power factor correction; Voltage stress of bulk capacitor; Boundary working-mode