【作者】 李明勇；

【导师】 钱照明；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2007， 硕士

【摘要】 随着新能源的开发和分布式发电系统的推广以及不间断电源(UPS)的应用，作为它们核心元件的逆变器受到特别关注。这些不仅要求逆变器的功率等级越来越高，而且功率密度的要求也越来越高，如何进行高功率密度下逆变电源的模块化设计成为新的研究热点。LC滤波器不仅能消除开关频率及邻近频带的谐波，还能改善逆变器的动态性能。其中，电感器性能的好坏不仅影响到系统的效率还影响到整个逆变器系统的稳定性。所以有必要对电感损耗，在高频下主要是线圈损耗和它的线圈交流电阻进行研究分析。本文首先综述了现代逆变器控制技术策略的现状和大功率开关器件的发展，并且简单分析了电感寄生电阻对逆变器性能的影响。在第二章中，介绍了30kVA实验样机的硬件设计，讨论了设计过程中的器件选择，散热设计，驱动保护电路设计，层叠式直流母线的设计方法和优点，采样电路设计和基于DSP和CPLD的数字控制平台等内容。在第三章中，首先完成了系统的LC滤波器设计和双环控制参数设计，最后对所设计的系统进行了仿真和实验两方面的验证。在第四章中，针对电感器，建立了更加精确的电感线圈的物理模型，分析了LCR表测得电感的模型图。然后针对不同的电感采用不用的方法，包括一维的计算方法和两维的仿真分析方法对电感的交流电阻和线圈损耗做出了具体计算分析，最后分别用单股铜线，Litz线和多股线并绕绕制了不同的电感进行了实验验证。更多还原

【Abstract】 With the development of the new energy, distributed power systems, and the wide use of UPS, research on the inverter is being given more and more attentions. The power rating and the power density are geting higher and higher. How to design a high power density inverter module becomes a R&D hotspot. LC filter is an important component of the inverter to reduce the output harmonics. And the inductor is the indispensable for the LC filter. The equivalent resistance of the inductor affects the performance of the inverter. So the winding loss and the AC resistance of the inductors should also be considered.This dissertation firstly introduces the modern control strategy for inverters, and how the equivalent resistance of the inductor affects on the performance of inverters is pesented. In the second chapter, the hardware design of the inverter module, including designs of its main circuit, the drive circuit, the sampling circuit, and the control circuit etc. is presented in detail.In the third chapter, the designs of the LC filter and the double loop control circuit are presented. And both the simulation results based on SABER platform and the experiment results on an experimental prototype are presented, which verify the theoretical analysis.In the forth chapter, a model of inductors is built up to reflect its more accurate characters. For different inductors, it gives different methods to analyze and calculate the winding losses and the AC resistances of the inductors. Finally different inductors wound by single-strand copper wires, Litz wires, and the parallel multi-strand wires have been made to prove the presented method.更多还原