| 全桥逆变弧焊主电路中RC缓冲电路的分析与设计 |
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| 引用本文： | 田松亚,李万刚,孙烨,吴冬春.全桥逆变弧焊主电路中RC缓冲电路的分析与设计[J].焊接学报,2007,28(3):81-84. |
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| 作者姓名： | 田松亚 李万刚 孙烨 吴冬春 |
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| 作者单位： | 河海大学,机电工程学院,江苏,常州,213022;河海大学,机电工程学院,江苏,常州,213022;河海大学,机电工程学院,江苏,常州,213022;河海大学,机电工程学院,江苏,常州,213022 |
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| 摘 要： | 在续流回路中续流二极管的开通与关断均产生负载的巨大变化,会给线路带来一定的di/dt,它与变压器的漏感、吸收回路电感以及杂散在线路中的电感作用,会形成电压浪涌,给IGBT带来电压冲击,这不利于IGBT的可靠工作.如果续流二极管始终处于关断状态,则在IGBT上不产生过电压,这种关断轨迹有利于IGBT可靠工作.建立了全桥主电路中IGBT关断期间的数学模型,求解该模型得到Uce数学解析式,得到变压器的漏感越小,IGBT的Uce电压越小的结论.根据具体的主电路参数,计算出合理开关轨迹下的RC缓冲电路中的电阻值,根据缓冲回路电阻的功率限制和开关轨迹的要求计算缓冲电容值,通试试验证明了IGBT关断期间的数学模型是正确的.
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| 关 键 词： | 桥式逆变主电路 开关轨迹 RC缓冲电路 电压浪涌 |
| 文章编号： | 0253-360X（2007）03-081-04 |
| 收稿时间： | 2006/5/12 0:00:00 |
| 修稿时间： | 2006-05-12 |
Analyze and design of RC snubber circuit in full-bridge inverter main circuit |
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| TIAN Songy,LI Wangang,SUN Yan and Wu Dongchun.Analyze and design of RC snubber circuit in full-bridge inverter main circuit[J].Transactions of The China Welding Institution,2007,28(3):81-84. |
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| Authors: | TIAN Songy LI Wangang SUN Yan and Wu Dongchun |
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| Affiliation: | The College of Mechanical & Electrical Engineering Hohai University, Changzhou 213022, Jiangsu, China,The College of Mechanical & Electrical Engineering Hohai University, Changzhou 213022, Jiangsu, China,The College of Mechanical & Electrical Engineering Hohai University, Changzhou 213022, Jiangsu, China and The College of Mechanical & Electrical Engineering Hohai University, Changzhou 213022, Jiangsu, China |
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| Abstract: | A great change of load occurs by freewheeling diode turning on and turning off in freewheeling circuit,it acts great quality of di/dt on main circuit.Voltage surge happens at the action of transformer leakage,induction of snubber and circuit induction,and harms IGBT by high voltage,and influences IGBT reliable work.If freewheel diode is in state of turning off,over high voltage will not produce,and it is good switching trace.Match model of IGBT Uce and Uce voltage equation is derived during turning off, and it shows that the less transformer leakage,the less voltage surge.According to main circuit parameter,R is calculated in good switching trace,and capacitance is calculated at the requirement of resistance power in snubber circuit and switching trace,and model is testified by the experiment.Reliability of main circuit is improved in full bridge inverter. |
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| Keywords: | full bridge inverter main circuit switching trace RC snubber circuit voltage surge |
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