双Buck半桥逆变器混合PWM控制策略  

Hybrid PWM Control Strategy Research for Dual-Buck Half-Bridge Inverter

作　　者：念平 林琼斌[1] 

机构地区：[1]福州大学,福州350116

出　　处：《电气技术》2017年第3期54-58,共5页Electrical Engineering

基　　金：福建省自然科学基金(2016J05154)

摘　　要：本文研究一种双Buck半桥逆变器的混合PWM控制策略。该PWM控制策略使逆变器工作在半周期调制,通过判断电感的工作状态来确定电路的控制模式。在电感电流连续模式(CCM)时逆变器采用电压电流双环控制。而在电感电流断续模式(DCM)时,通过分析出电感电流断续工作时的占空比和连续工作时占空比的映射关系,使得逆变器在线性连续工作区和强非线性的断续工作区均能良好地跟踪给定值,减小了双Buck半桥逆变器在半周期脉宽调制下的波形畸变问题。The paper study a novel PWM control strategy in dual buck half bridge inverter topology. The circuit control mode of this PWM control strategy is determined by judging the working state of the inductance. In the continuous current mode （CCM）, the inverter adopt voltage outer loop and current inner loop control mothod.And in the discontinuous current mode （DCM）, through the analysis of mapping relationship between the discontinuous current duty ratio and continuous one, which makes makes the inverter can be a good control of the output voltage tracking a given value in linear or strong nonlinear operation mode under dual loop control method. The waveform distortion of dual buck inverter under half cycle modulation is greatly reduced.

关 键 词：双降压半桥逆变器 半周期调制 混合控制 波形畸变 

分 类 号：TM464[电气工程—电器]