提高逆变点焊电源开关频率与节材  

Improvement of the switch frequency and the material-decrease for spot welding inverter power

作　　者：李西恭[1] 朱燕丛[1] 谭本刚[1] 张云[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《电焊机》2007年第2期30-33,共4页Electric Welding Machine

摘　　要：电阻点焊逆变电源与工频交流电源相比,其主要优点是可以节能1/4～1/3。开关频率是逆变电源最基本的设计参数,能否正确设计开关频率直接关系到电源的成本、效率和使用性能。变压器加整流器习惯被称为一体式变压器,是逆变点焊机的核心部件。通过改进二次整流电路,研制出开关频率20kHz,容量40kVA,暂载率20%,质量6 kg的的点焊一体式变压器。两台一体式变压器并联使用时可焊3mm+3mm的低碳钢板。Compared with 50 Hz AC Power supply,the virtue of spot welding is that it can save 1/4 to 1/3 energy.The basic designed parameter is the frequency of the switch ,so designing accurate switch frequency is very important to cost, efficiency and capability of the welding power.The core part of the inverter spot welding machine is the integrated transformer,which is consisted of transformer and rectifier.By ameliorating secondary rectified circuit,a spot welding integrated transformer with 20 kHz switch frequency,20% duty cycle and 6 kilogram weight has been designed. Two shunt-connection integrated transformers can weld 3 mm＋3 mm low-carbon steel.

关 键 词：开关频率 逆变 暂载率 一体式变压器 

分 类 号：TG434.1[金属学及工艺—焊接]