IGBT串联谐振逆变电阻点焊机的研究与改进  

IGBT Series Resonant Inverter Research and Improvement of the Resistance Spot Welding Machine

作　　者：刘晓东[1] 杨艳[1] 李方元[1] 王景兵[1] 

机构地区：[1]青岛大学自动化工程学院,山东青岛266071

出　　处：《电气技术》2015年第5期39-43,共5页Electrical Engineering

摘　　要：目前逆变焊接电源主要有单端式、半桥式、全桥式三种主电路形式,其中半桥串联谐振逆变电阻的应用较为普遍,但仍存在开关损耗大、电源利用效率低等问题。本课题针对现有逆变点焊机存在的一些问题加以解决和优化,提出了一种新型低Q值半桥串联谐振逆变感应焊接电源的电路拓扑,它可以将系统内部的一部分无功能量转变为有功能量,从而降低电路Q值,提高逆变焊接电源的输出效率[1],并且通过TMS320F2812型DSP进行闭环控制。仿真实验分析表明,该半桥式IGBT串联谐振逆变电阻点焊机具有效率高、稳定性好、PWM控制精确等优点,使逆变点焊机的整机工作性能得到提高。The current circuit of inverter welding power source are mainly single-ended type, half bridge, bridge type three kind of forms, including the application of a half-bridge series resonant inverter resistance is relatively common, but there are big switch loss, low utilization efficiency of power supply and other problems. This topic to solved some problems of the current inverter spot welding machine and the optimization, this paper proposes a new type of low Q value a half-bridge series resonant inverter induction welding power source circuit topology, it can be internal part of the system without the amount of functionality into active energy, and reduces the Q value of the circuit, improve the efficiency of the output of the inverter welding power source, type and by TMS320F2812 DSP for closed-loop control, the simulation experimental research shows that the a half bridge IGBT series resonant inverter spot welding machine is high efficiency, good stability, PWM control precision, etc, make the inverter spot welding machine working performance was improved.

关 键 词：逆变点焊机 低Q值 虚功转化实功 TMS320F2812 

分 类 号：TM464[电气工程—电器] TN322.8[电子电信—物理电子学]