文档介绍：华中科技大学
硕士学位论文
高功率因数软开关逆变弧焊电源的研究
姓名:余新颜
申请学位级别:硕士
专业:电力电子与电力传动
指导教师:康勇;段善旭
20050429
摘要
本文首先对移相全桥 ZVS PWM 变换器这种目前在逆变弧焊电源中应用最广泛的拓
扑进行了深入研究,详细分析了其工作原理和软开关实现条件,指出了其优缺点。
因为传统的移相全桥 ZVS PWM 变换器的软开关方案存在一些固有的缺陷,本文进
一步对在其基础上发展起来的移相全桥 ZVZCS PWM 变换器进行了深入地研究。接着以
由饱和电感实现滞后臂 ZCS 的移相全桥 ZVZCS PWM 变换器拓扑为主电路,结合 ZVZCS
实现条件进行了主电路设计,给出了设计原则。针对弧焊电源这种特殊电源,本文在
深入分析其动、静态特性要求的基础上进行了控制系统设计。在上述研究的基础上设
计了一台 250A/10kW 实验逆变弧焊电源,并给出了实验结果。实验结果证明实验电源
效率高,可靠性好,动静态特性好,体积小,重量轻。
功率因数校正技术是当前电力电子领域的一个热点,因为各国相继对谐波污染制
定了限制标准,功率因数校正势在必行。本文对三相功率因数校正技术也进行了较深
入地研究。首先分析了目前比较常见的几种三相 PFC 拓扑,指出了其优缺点,然后本
文提出了一种能实现完全解耦的单相模块组合式三相 PFC 方案,实现了系统的功率因
数校正和谐波抑制。该方案能够充分利用成熟的单相PFC 技术,结构简单、可靠性高、
谐波抑制效果好,是一种有实用价值的方案。仿真结果证明了该方案的可行性。

关键词:逆变弧焊电源移相全桥变换器功率因数校正软开关饱和电感
I
Abstract
This thesis gives a detailed analysis of the operation principle and the limitation of
soft-switching of the traditional topology of phase-shift full-bridge ZVS PWM converter
which is widely used in arc-welding power supply. For the traditional phase-shift
full-bridge ZVS PWM converter has some certain disadvantages, the thesis emphasizes on
the research of phase-shift full-bridge ZVZCS PWM converter. The topology of phase-shift
full-bridge ZVZCS PWM converter with saturable inductor is chosen as main circuit. The
thesis designs the main bining the conditions to achieve soft-switching, and
gives the design principles. On the basis of analyzing dynamic and static features of
arc-welding power supply, the control system is also designed. An experimental
arc-welding inverter of 250A/10kW is manufactured according to the before-mentioned
principle. Experimental results are given at the end of each part of the thesis.
PFC technology is a hot spot in the filed of power electrics now, because many
countries have set the standard of limitations on harmonic pollution. The thesis also does
some research on three-phase PFC technology. It analyzes several three-phase PFC
topology at first, then gives