基于多级耦合电感的限流型等离子切割电源  

A Plasma Cutting Power with Current Limited Based on Multi-stage Coupled Inductor

作　　者：陈龙 胡克满[1] 胡国伟[1] 宋孙浩[2] CHEN Long;HU Keman;HU Guowei;SONG Sunhao(School of Electronic Information Engineering,Ningbo Polytechnic,Ningbo 315800,Zhejiang,China;Ningbo Institute of Materials Technology&Engineering CAS,Ningbo 315201,Zhejiang,China)

机构地区：[1]宁波职业技术学院电子信息工程学院,浙江宁波315800 [2]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《电气传动》2021年第13期27-32,共6页Electric Drive

基　　金：浙江省自然科学基金(LGG18E070006)。

摘　　要：等离子切割电源的电弧稳定性和弧电流的精细度限制了等离子加工的切割效果,提出了一种基于多级耦合电感的新型DC-DC变换器,既能使电弧电流快速响应,又能有效地对桥臂及输出回路起到限流的作用,不仅能提升电弧的稳定性,而且也改善了电弧电流精度。首先分析了新型DC-DC变换器的拓扑结构,在建立多级耦合电感(MCI)数学模型的基础上,在Simulink模型中验证了MCI参数变化对变换器的限流能力,并进一步探讨MCI变换器的可行性。最后,搭建了10 kW等离子切割电源实验平台,验证了MCI变换器限流的正确性和可行性。The stability of plasma arc and the precision of arc current limit the cutting effect of plasma cutting of the plasma cutting power supply.A novel DC-DC converter based on multi-stage coupled inductor(MCI)was proposed,which can not only fastly respond to arc current,but also effectively limit the current of bridge arm and output circuit,thus can improve the stability and the accuracy of arc current.Firstly,the topology of the new DC-DC converter was analyzed,the current limiting ability of the converter was verified based on the mathematical model of multi-stage coupled inductor(MCI)using the Simulink model.Moreover,the feasibility of MCI converter was discussed.Finally,an experimental platform of 10 kW plasma cutting power supply was built to verify the correctness and feasibility of current limiting with the MCI converter.

关 键 词：等离子电弧 多级耦合电感 快速响应 数学模型 

分 类 号：TM464[电气工程—电器] TM401