Based on the above theoretical analysis , a 1kw three - level buck converter with passive soft switching is designed in this thesis 在理论分析的基础之上，本文结合多电平技术与无源软开关技术，设计了一台1kw的无源软开关三电平buck变换器。
This converter operates as a bidirectional converter and transfers energy between its two sides by charging the midpoint capacitors to a known constant dc voltage level 多电平矩阵变换器的能量传递，是通过三相输入电压对中点电容充电到一个恒定直流电压而实现的。
This dissertation overviews the current development situation of high voltage high power converter , and introduces the topology structure and working principle 本文综述了高电压大容量变频器技术的发展现状，给出了串联h桥多电平变频器的主回路的拓扑结构和工作原理。
The series h - bridge multilevel converter ' s power circuit is composed of uncontrolled rectifier with filtering capacitor and single phase h - bridge voltage - type inverter 串联h桥多电平变频器的主回路从结构上可分为三相电容滤波不可控整流电路和单相电压型全桥逆变电路。
The series h - bridge multilevel converter has the advantages of high output voltage , high power , lower harmonic content in line and motor sides and high input power factor 串联h桥多电平变频器具有输出电压高、功率大，输入侧和输出侧谐波含量小，输入功率因数高等特点。
A novel modulation method for cascaded multicell inverter with separated dc sources is presented in this paper to balance the unequal power distribution among different invert cells 摘要针对带独立直流源的级联型多电平逆变器各逆变单元间应力分配不均衡提出了一种新的调制方法。
The 6kv transducer with the series - wound unit of the pwm pressure type can realize the output of the direct high pressure by collecting a lot of lower frequency conversion pressure 单元串联多电平pwm电压源型6kv变频器采用若干个低压pwm变频功率单元串联的方式实现直接高压输出。
To reduce the inductor and the phase displacement between the input current and the input voltage simultaneously , multi - level ( ml ) converters are adopted as the pfc topologies in this thesis 为了同时减小电感和输入电流与输入电压间的相位差,本文提出采用多电平变换器作为pfc变换器的拓扑。
On the basis of a conventional matrix converter and a multilevel inverter , a novel multilevel matrix converter is proposed , and its topology configuration and principle are introduced 摘要在传统矩阵变换器和多电平逆变器的基础上，提出一种新颖的多电平矩阵变换器，介绍了其拓扑结构和工作原理。
Then two kinds of simple passive lossless soft switching cells , which are applicable to non - isolated multilevel converters , are introduced in the thesis . their operation process is analysed in detail with figures and equations 然后对适用于多电平非隔离直流变换器的两种最简无源无损软开关单元电路的工作过程进行了详细的分析与推导。
