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储能电感电流限定单周期控制单相电流型PWM逆变器研究

, PP. 311-319

Keywords: 电流型,PWM逆变器,单相,单周期控制,储能电感电流限定

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Abstract:

为了克服传统单相电流型PWM逆变器存在的储能电感及其电流大、输出电压波形畸变严重的固有缺陷,提出了一种具有储能电感电流限定的单周期非线性控制单相电流型PWM逆变器,储能电感电流在高于和低于限定值两种情况时逆变器分别工作在续流方式和Boost方式。深入分析研究了这种逆变器一个低频输出周期内的八种电路模式、开关状态方程和高频开关工作过程等稳态原理特性,推导出了电压传输比、储能电感电流限定值、储能电感、输入和输出滤波器、功率开关电压和电流应力等主要参数的设计准则。设计并研制成功的1kVA110VDC/220V50Hz逆变器样机具有单级升压变换、变换效率高、输出波形质量高、储能电感小等优点,证实了所提出研究方案和理论分析的正确性,有效地克服了传统单相电流型PWM逆变器的固有缺陷。

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