中频电炉节能原理及方法的的分析研究.pdf

万方数据山东理工大学硕士学位论文 摘要 I 摘要感应加热理论的不断完善和感应加热设备的不断发展, 感应加热的应用领域和应用范围也不断扩大。伴随人们环保意识明显增强,大功率、高效、环保、节能的感应加热用电源设备成为业界所关注的热点课题。本文对中频感应电炉的整体结构进行了分析,首先阐述感应加热的现状、研究意义和趋势,通过分析和对比三种中频电炉结构和特点,对负载加热时原理、规律和参数变化予以研究。为了说明中频电炉的节能原理,从高压进线、整流变压器、晶闸管、半桥逆变、一直到炉体的结构做出了详细的分析。主要工作如下: 一、详细分析了晶闸管并联谐振电源、晶闸管串联谐振电源、 IGBT 串联谐振电源三种中频电源系统的电路结构。二、分析了中频电炉的基本能耗,包括熔炼操作过程中的能量消耗,中频电炉系统电阻性电能损耗,中频电炉系统炉体热能损耗。三、对中频电炉的节能原理进行了详细的分析。主要分析了感应圈的耗能原理, 中频电炉电抗器的耗能原理, 炉衬的热损耗以及中频电炉水冷电缆和馈电母线的耗能原理。四、中频电炉综合节能设计原理。首先从主电路、工作波形谐波含量、功率因数对比了并联和串联两种逆变器;其次讨论总结了炉衬和熔炼操作对节能的影响;最后总结了电能质量对节能的影响,得出 12 脉整流并联谐振电炉节能达 10~15% ,进线电流的 5 、 7 等 1 6 ± n 次谐波大大降低,并在一定程度上提高了功率因数,降低能耗。关键词:中频电炉;感应加热;节能;熔炼万方数据山东理工大学硕士学位论文 Abstract II Abstract With the improving of theory and development of appliance, the application of induction heating is broader and broader. Along with the enhancing of people’s environmental protection consciousness, it has been one popular spot among munity to research and develop power supply for induction calef action, which characteristics of high-power, high efficiency and environment-friendly. This paper presents the whol e structure of the intermediate frequency induction furnace. We studied characteristics of heating load prin ciple, law and parameters to change through the analysis parison of three kinds of intermediate frequency electric stove structure. The main researches are as follows: (1)This paper analyzes the circuit structure of three kinds of intermediate frequency power system and the intermediate frequency electric stove basic energy consumption. (2)Analysis of the energy saving principle of in termediate frequency electric stove. Include the induction coil energy princi ple, intermediate frequency electric stove reactor energy principle, lining heat loss and intermediate fr equency electric stove water-cooled cable and feeder bus principle of energy consumption. (3)prehens