摘要
超导直流感应加热装置利用超导磁体产生的直流磁场在旋转的金属工件中感应涡流加热工件,较传统交流感应加热技术具有更高的效率,市场竞争优势大。该文在现有超导直流感应加热装置基础上提出一种双C型结构,较传统C型结构减少了铁磁材料的使用。针对该结构感应加热装置,通过研究气隙磁场分布对涡流损耗的影响,提出采用弧形气隙提升装置的加热效率。建立等效模型分析了直流感应加热装置起动转矩的影响因素,得到起动转矩随转速、工件半径等因素的变化规律。针对双C型超导直流加热装置双线圈、双铁心的特殊结构提出采用变气隙的方式进行弱磁起动,解决了超导直流感应加热装置起动转矩过大的问题。相关研究结论可以为有铁心感应加热装置设计提供参考。
The superconducting induction heating device can be used to heat the rotating metal workpieces in its DC magnetic field.It has higher efficiency than traditional AC induction heating device and has a greater market competitive advantage.In this paper,a double C-type device is proposed based on the existing heating device,which greatly reduces the use of ferromagnetic materials.By studying the influence of air gap magnetic field distribution on the eddy current loss,a method based on arc air gap is proposed to improve the heating efficiency.An equivalent model is established to analyze the starting torque of the DC induction heating device,and the variation rules of the starting torque with the rotation speed and the workpiece radius are obtained.According to the special structure of the double coils and double iron cores of the device,a variable air gap method is adopted to solve the problem of excessive starting torque in the heating process.The relevant research conclusions can provide a reference for the design of superconducting DC induction heating device with iron-cores.
作者
张文峰
姜永将
张晓红
李捷
Zhang Wenfeng;Jiang Yongjiang;Zhang Xiaohong;Li Jie(College of Automation&College of Artificial Intelligence Nanjing University of Posts and Telecommunications Nanjing,210023 China;State Grid Anhui Electric Power Company Bengbu Power Supply Company,Bengbu 230061 China;State Grid Beijing Electric Power Company,Beijing 100031 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第S02期444-450,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(52007086)
江苏省高校自然科学基金(19KJB470028)
南京邮电大学校级科研基金(NY219018&NY220019)资助项目。
关键词
感应加热
高温超导
电磁场
起动转矩
Induction heating
high temperature superconducting
electromagnetic field
starting torque
