储能电感电流限定单周期控制单相电流型PWM逆变器研究  

Research on Single-phase Current Mode PWM Inverter of One-Cycle Control Strategy with Limited Storage Inductance Current

作　　者：陈亦文[1] 邱琰辉 何勇吉 陈道炼[1] 

机构地区：[1]福州大学电力电子与电力传动研究所,福州市350116

出　　处：《电工技术学报》2015年第14期311-319,共9页Transactions of China Electrotechnical Society

基　　金：福建省高校产学合作科技重大项目基金资助(2012H6009)

摘　　要：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1k VA 110VDC/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。To overcome the traditional single-phase current mode PWM inverter＇s inherent defects such as large energy storage inductance, large energy storage inductance current and serious distortion of the output voltage waveform, the single-phase current mode PWM inverter of one-cycle control strategy with limited energy storage inductance current is proposed in this paper. The inverter is working at current freewheeling mode when the energy storage inductance current is above the limited value or at Boost mode when it is below the limited value separately. The steady principle characteristics of this kind of inverter such as eight operating modes in one low frequency output cycle, the state equations of the switches, and the high-frequency operating process are deeply investigated. And the main design criterias for the key circuit parameters such as the voltage transfer ratio, the limited value of the energy storage inductance current, the value of the the energy storage inductance, the input and output filters, and the voltage and current stress of the power switches are derived. Designed and developed 1k VA 110VDC/220V50 Hz inverter prototype has the advantages such as single-stage boost conversion, high conversion efficiency, high quality output waveform, low energy storage inductance etc. The correctness and advancement of the proposed research scheme and theoretical analysis are fully confirmed, and effectively overcomes the inherent defects of the traditional single-phase current mode PWM inverter.

关 键 词：电流型 PWM逆变器 单相 单周期控制 储能电感电流限定 

分 类 号：TM470.40[电气工程—电器]