感应加热中功率延伸电缆结构形式的优选设计

Optimization Design of Connecting Power Cable in Induction Heating

在某些特殊工艺的感应加热中 ,感应线圈需要通过延伸电缆与电源连接 .为了解决延伸电缆带来的功率损耗高的问题 ,分析了并行实芯导体结构、同轴空心导体结构和多束细漆包线密布结构等 3种结构形式的电缆的功率损耗和回路电感储能的情况 ,并进行了试验测定与分析 ,结果表明 ,多束细漆包线密布结构电缆上的功率损耗最小 ,同轴空心导体结构电缆回路的电感量最小 .据此 ,提出了以同轴空心导体结构为基本结构 ,内、外导体为多束细漆包线密布而成的延伸电缆结构形式 .

In some induction heating process, induction coil is connected with power source through connecting power cable. In order to solve the problem of lower heating efficiency brought by connecting power cable, the power loss and the energy stored in inductance during induction heating were calculated. The parallel solid cables, the coaxial hollow cables and the cables made by lots of electrically insulated slimlines were tested and analyzed. It shows that the cables made by lots of electrically insulated slimlines have the lowest power loss and the coaxial hollow cables have the lowest inductance. So an advantageous cable structure was put forward, which is arrayed around same axis by lots of electrically insulated slimlines for both inside conductor, and outside conductor, and the middle of inside conductor is hollow.