一种低压输入高压输出的两级式逆变器高效率调制方法  

A High-Efficiency Modulation Method of Two-Stage Inverter with Low Voltage Input and High Voltage Output

作　　者：旷永红[1] 谢伟 田莉[1] 林愿[1] 周细凤[1] KUANG Yonghong;XIE Wei;TIAN Li;LIN Yuan;ZHOU Xifeng(College of Electrical and Information Engineering,Hunan Institute of Engineering,Xiangtan 411104,Hunan,China;Institute of Electrical Technology and Material Engineering,CRRC Zhuzhou Electric Locomotive Research Institute Co.,Ltd.,Zhuzhou 412001,Hunan,China)

机构地区：[1]湖南工程学院电气与信息工程学院,湖南湘潭411104 [2]中车株洲电力机车研究所有限公司电气技术与材料工程研究院,湖南株洲412001

出　　处：《上海交通大学学报》2023年第7期878-886,共9页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(52077189);湖南省自然科学基金(2021JJ30185)资助项目。

摘　　要：车载逆变器向着小型化、轻量化和高功率密度的趋势发展.针对现有输入电压为DC 110 V的车载单相逆变器采用Boost电路和全桥逆变两级独立调制而存在效率低、功率密度小等问题,提出了一种Boost电路和全桥逆变两级协同式调制方法.该方法根据输入电压与输出电压绝对值的大小关系使Boost电路和全桥逆变电路处于不同的工作方式,优化绝缘栅双极型晶体管开关状态和二极管通断状态,从而降低逆变器的损耗,提升逆变器效率.同时,该方法能减少全桥逆变电路的输出谐波,从而缩小滤波器件的尺寸,提升逆变器功率密度.设计制作一台2.75 kV·A车载逆变器样机,实验验证了所提方法的正确性和可行性.Miniaturization,lightweight,and high power density are development trends of vehicle-mounted inverters.The existing vehicle mounted single-phase inverter with DC 110 V input voltage adopts two-stage independent modulation between Boost circuit and full bridge inverter circuit,which has the problems of low efficiency and low power density.To solve these problems,a two-stage cooperative modulation between Boost circuit and full-bridge inverter circuit is studied.According to the relationship between the absolute value of input voltage and output voltage,the Boost circuit and the full-bridge inverter operate with different modes in the proposed method,which optimizes the insulated gate bipolar transistor(IGBT)switching state and diode on-off state to reduce the loss of the inverter and improve the efficiency of the inverter.At the same time,the output harmonics of the full-bridge inverter circuit can be reduced to decrease the size of the filter and improve the power density of the inverter.A 2.75 kV·A prototype is designed and fabricated.Experiments are conducted to verify the correctness and feasibility of the proposed method.

关 键 词：低压输入高压输出 逆变器 两级协同式调制 功率密度 

分 类 号：TM464[电气工程—电器]