电器与能效管理技术Issue(6)：7-12,47,7.DOI:10.16628/j.cnki.2095-8188.2019.06.002
直流大功率无极性换流式多触头接触器设计与试验研究
Design and Experimental Study of DC High Power Current-Transfer Multi-contact Hydrogen Contactor
摘要
Abstract
A contact structure suitable for non-polarity, large rated current and high breaking capacity was proposed,which provides a new idea for quickly cutting off DC high voltage and large current load. The arc chamber adopts a contact structure in which the through-flow branch and the arc-extinguishing branch are connected in parallel. The contact resistance is reduced by designing the contact form of the through-flow branch, thereby solving the temperature rise of the contact when carrying a large current and improving the rated current of the switch. The large current can be transferred to the arc extinguishing branch in a very short time (several hundred microseconds) when breaking the overload current,and the circuit is cut by arc extinguishing contacts under the hydrogen and mixed atmosphere environment. It is verified by experiments that the contact resistance of this structure is very small during the conduction phase and the overload current of DC 1100 V and 1100 A is cut off quickly. There is no obvious ablation on the contact of the through-flow branch after the experiment and the arc-extinguishing branch contact has the ability to break the higher voltage level. This structure can effectively improve the breaking capacity and service life of the contactor.关键词
换流式触头结构/氢气及混合气体接触器/触头形貌/电弧形态Key words
commutated contact structure/hydrogen and mixed gas contactor/contact morphology/arc appearance分类
信息技术与安全科学引用本文复制引用
贾博文,武建文,孙凡雯,罗晓武,蒋原,马速良,金巍..直流大功率无极性换流式多触头接触器设计与试验研究[J].电器与能效管理技术,2019,(6):7-12,47,7.基金项目
国家自然科学基金面上项目(51677002) （51677002）
