The multiplex pwm generator based cpld is connected to mcu and dsp , the pwm waveforms are shown . furthermore , this pwm waveforms are applied to the multilevel converters , the results demonstrate the feasibility of the application 将基于cpld的波形发生器与单片机以及dsp进行连接，输出相应的pwm波形，并且应用到级联型多电平变流器中，验证了实验的正确性。
The multi - level inverter is a circuit topology proposed in the early 1980s particularly applied in the high voltage variable frequency speed regulation area . it has the characters of reducing the switch stress and improving the quality of output waveform 多电平逆变器是上世纪80年代初提出来的一种适用于高压变频调速领域的电路拓扑,具有降低器件应力,改善输出波形质量的特点。
The multi - level ( ml ) converter has the advantages such as low voltage stress for power devices , smaller output filters and reduced harmonic content of the output voltage , it is very suitable for high voltage and high power conversion applications 多电平变换器具有电压应力低、输出滤波器小及输出电压谐波含量小等优点,特别适合于高电压大功率的应用场合,近年来正受到越来越多的关注。
This paper builds the small - signal model of the ml converter , and decouples the converter into several independent single - input single - output systems with the control strategy proposed in [ 8 ] , so the closed - loops for the output voltage and the flying capacitor voltages can be designed independently 本文首先建立了buck多电平变换器的小信号模型,并利用文献[ 8 ]提出的控制方法将该变换器解耦成多个单输入单输出系统。
In this paper , the basic commutation cell in multilevel converters is proposed , based on which a series of multilevel converters with flying capacitors are derived . the operation principle of buck ml converter and its output characteristics are analyzed in details in this paper 本文总结了飞跨电容型多电平变换器的拓扑变换思路，并将其推广到boost 、 buck - boost 、 cuk 、 zeta和sepic变换器中，得到一族飞跨电容型多电平直流变换器。
Multilevel ( ml ) converters have been attracting more and more attention because they have the advantages such as low voltage stresses for power devices and reduced harmonic content of the voltage waveform . they are very suitable for high voltage and high power conversion applications 多电平直流变换器由于其开关管及二极管的电压应力低、输出电压谐波含量小等优点，特别适合于高电压大功率的应用场合，近年来正受到越来越多的关注。
Multilevel converters and soft switching technology together with their applications in dc / dc field are introduced in this thesis . taking buck as the example , the operation principle and process of non - isolated three - level dc / dc converters are analyzed and discussed with calculation 本文对多电平和软开关技术及其在直流变换领域的应用进行了介绍，并以buck电路对例，对三电平非隔离直流变换电路的工作原理和过程进行了分析、计算与讨论。
The background of this dissertation is based on a project of researching and developing a high voltage series h - bridge multilevel converter , which drives an induction motor of 6300v , 2240kw for driving a water flooding pump in taigang . the research work on high voltage high power series h - bridge multilevel converter has been carried out by theory analysis , computer simulation and experiments 本文以太钢某厂额定功率2240kw ，额定电压6300v注水泵电机变频调速科研工程为背景，从理论分析、计算机仿真和装置实验几方面入手，对高电压大容量串联h桥多电平变频器的理论和工程应用技术进行较深入研究。
The following is the main works and conclusions of this thesis . the novel upfc needs high power rate because it is generally used in high voltage transmission lines . after studied high - power converters and the literatures of upfc , the main circuit topology of novel upfc base on diode - clamping multilevel inverter is presented and the principle of using novel upfc to eliminate zero sequence and negative sequence currents is analyzed 本文所做的主要工作及得出的主要结论如下：由于upfc一般用于高压输电线，其功率等级要求很高，在综合研究大功率变换器和upfc现有文献的基础上，提出了基于二极管箝位多电平变换器的新型upfc的主电路拓扑，分析了用其来滤出高压输电线非全相运行时所产生的零序和负序电流的原理。
Firstly , the control functions of high - voltage variable frequency drive system and multilevel inverters and the demands of this monitoring system are analy z e d . the thoughts of hardware design , the whole structure and the function of each hardware module are introduced respectively in this paper 论文首先从监控系统的设计要求入手，着重分析了高压变频驱动系统和多电平变频器控制的要求和功能，阐述了监控系统的硬件设计的思路，构建出系统的整体结构，并分别介绍了系统各个硬件模块的功能。
