高频焊接设备的谐波分析与治理  

Harmonic Analysis and Suppression of High-frequency Welding Devices

作　　者：罗胜金[1] 杜雄[1] 周雒维[1] 

机构地区：[1]重庆大学电气工程学院高电压与电工新技术教育部重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2005年第2期26-31,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(60172009)

摘　　要：分析了三相交流调压电路的电路结构及其电源电流波形;建立了一个三相交流调压电路的具体应用实例———高频焊接设备的仿真模型,并对其线电流的谐波状况进行了仿真分析,仿真结果与现场谐波测试结果进行了对比分析,二者相符,说明仿真电路模型正确。针对设备的谐波状况设计了两组单调谐滤波器和一组二阶高通滤波器,对加入了LC滤波器的电路进行仿真验证,发现电源线电流的高次谐波含量大幅度减少,波形接近正弦波,这证明了谐波治理方案设计的正确性。This paper analyzes the structure and line current waveform of 3-phase AC voltage regulation circuit. As an application of 3-phase AC voltage regulation circuit, a high-frequency welding device's simulation model and harmonic analysis of line current are presented. Results of simulation are compared to field measurements. The two are in a good agreement, so this simulation model is correct. Two single-tuning filters and one second-order HPF are designed according to the device's harmonic condition. Simulation results of the circuit with filters indicate decrease of the harmonics in current of power supply, and the waveform is close to sinusoidal wave, which prove correctness of the solution to harmonics pollution.

关 键 词：三相交流调压 仿真电路模型 谐波分析 LC滤波器设计 

分 类 号：TM714.1[电气工程—电力系统及自动化]