等离子切割机半桥逆变电源的均压设计
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摘要
等离子切割机电源常用的半桥逆变型DC-DC变换器具有结构简单、控制方便和成本低廉的优点,但是具有直流电容均压问题,而该问题又是切割机长期运行需要特别解决的技术问题。通过分析容值不同对电容分压和储能的影响,选择了静态无源均压和基于电容电压偏差的动态有源均压方法以及输出电流PI调节控制,实现了输出电流在35～105 A之间连续可调的等离子切割机实物样机,实测数据表明电解电容均压效果良好,380 V三相交流供电时偏差为±10 V。
Half bridge inverter type DC-DC converter is widely employed as plasma cutting machine power supply. It has the advantages of simple structure,easy control and low cost,but has the DC capacitor voltage balancing problem,which is the key problem of long-term operation of cutting machine. The effects of voltage sharing and energy storage of the capacitors were analyzed with different capacitances,and a steady passive voltage sharing method and a dynamic active voltage sharing on the basis of voltage deviation were put forward,and the PI controller over output current was adopted. Eventually,the plasma cutting machine with continuous output current at 35～105 A was prototyped,when fed by 380 V three-phase power supply,the voltage deviation across the two capacitors fell into ±10 V.
Half bridge inverter type DC-DC converter is widely employed as plasma cutting machine power supply. It has the advantages of simple structure,easy control and low cost,but has the DC capacitor voltage balancing problem,which is the key problem of long-term operation of cutting machine. The effects of voltage sharing and energy storage of the capacitors were analyzed with different capacitances,and a steady passive voltage sharing method and a dynamic active voltage sharing on the basis of voltage deviation were put forward,and the PI controller over output current was adopted. Eventually,the plasma cutting machine with continuous output current at 35～105 A was prototyped,when fed by 380 V three-phase power supply,the voltage deviation across the two capacitors fell into ±10 V.
引文
[1]刘宝其,段善旭,李勋,等.逆变型等离子切割电源双闭环控制策略[J].中国电机工程学报,2011,31(9):15-22.
[2]Ramakrishnan S,Gershenzon M,Polivka F,et al.Plasma Generation for the Plasma Cutting Process[J].IEEE Transactions on Plasma Science,1997,25(5):937-946.
[3]孙强,刘延明.逆变型空气等离子切割机低频引弧技术的研究[J].电力电子技术,2011,45(7):121-123.
[4]李强.半桥逆变弧焊电源系统建模和仿真技术研究[D].青岛:青岛大学,2007.
[5]贾德利,尤波,张雪岩,等.逆变型等离子弧切割电源的建模及仿真研究[J].系统仿真学报,2009,21(18):5840-5844.
[6]刘延明.基于DSP的逆变器式空气等离子切割机控制系统的研究[D].西安:西安理工大学,2011.
[7]贾德利,尤波,许家忠,等.逆变式等离子切割电源变间距模糊PI控制[J].电机与控制学报,2008,12(3):313-318.
[8]张宇,渠浩,张宁云,等.基于分段PI控制的逆变式等离子切割电源设计[J].电力电子技术,2017,51(4):68-70.
[9]朱彬若,江剑锋,渠浩,等.等离子切割机半桥逆变电源的设计[J].电气自动化,2016,38(5):42-43.
[10]Lo Yu-Kang,Song Tzu-Herng,Chiu Huang-Jen.Analysis and Elimination of Voltage Imbalance Between the Split Capacitors in Half-bridge Boost Rectifiers[J].IEEE Trans.on Industrial Electronics,2002,49(5),1175-1177.
[11]Lin B R,Hung T L.Single-phase Half-bridge Converter Topology for Power Quality Compensation[J].IEE Proceedings on Electric Power Applications,2002,149(5):351-359.
[12]Hung Yu-Chieh,Shyu Fu-San,Lin Chih Jung,et al.New Voltage Balance Technique for Capacitors of Symmetrical Halfbridge Converter with Current Mode Control[C]//International Conference on Power Electronics&Drive Systems,PEDS,2003:365-369.
[13]朱军卫,龚春英.半桥逆变器电容不均压问题的分析与研究[C]//第十五届全国电源技术年会论文集,上海,2003:310-313.
[14]陈东华,谢少军.电流型控制半桥逆变器研究(Ⅰ)--直流分压电容不均压问题[J].电工技术学报,2004,19(4):85-88.
[15]陈东华,谢少军.电流型控制半桥逆变器研究(Ⅱ)--直流分压电容不均压问题[J].电工技术学报,2004,19(6):69-73.
[16]杨水涛,张帆,刘金云,等.一种新型半桥逆变器电容均压控制策略[J].电工技术学报,2006,21(7):31-36.
[17]刘征威,孙丽娜,陈新.全数字半桥PWM整流器电容均压控制策略研究[J].电力电子技术,2010,44(2):92-94.
[18]阮新波,危健,薛雅丽.非隔离三电平变换器中分压电容均压的一种方法[J].中国电工技术学报,2003,23(10):28-31.
[19]王万宝,张犁,胡海兵,等.单相半桥三电平并网逆变器中点电压不平衡机理及其均压控制策略[J].中国电机工程学报,2014,34(6):839-845.
[20]贾娜,吴锐,陈中圆,等.单相半桥逆变器电容电压不平衡研究[C]//第四届电能质量及柔性输电技术研讨会,呼和浩特,2012:303-306.
[2]Ramakrishnan S,Gershenzon M,Polivka F,et al.Plasma Generation for the Plasma Cutting Process[J].IEEE Transactions on Plasma Science,1997,25(5):937-946.
[3]孙强,刘延明.逆变型空气等离子切割机低频引弧技术的研究[J].电力电子技术,2011,45(7):121-123.
[4]李强.半桥逆变弧焊电源系统建模和仿真技术研究[D].青岛:青岛大学,2007.
[5]贾德利,尤波,张雪岩,等.逆变型等离子弧切割电源的建模及仿真研究[J].系统仿真学报,2009,21(18):5840-5844.
[6]刘延明.基于DSP的逆变器式空气等离子切割机控制系统的研究[D].西安:西安理工大学,2011.
[7]贾德利,尤波,许家忠,等.逆变式等离子切割电源变间距模糊PI控制[J].电机与控制学报,2008,12(3):313-318.
[8]张宇,渠浩,张宁云,等.基于分段PI控制的逆变式等离子切割电源设计[J].电力电子技术,2017,51(4):68-70.
[9]朱彬若,江剑锋,渠浩,等.等离子切割机半桥逆变电源的设计[J].电气自动化,2016,38(5):42-43.
[10]Lo Yu-Kang,Song Tzu-Herng,Chiu Huang-Jen.Analysis and Elimination of Voltage Imbalance Between the Split Capacitors in Half-bridge Boost Rectifiers[J].IEEE Trans.on Industrial Electronics,2002,49(5),1175-1177.
[11]Lin B R,Hung T L.Single-phase Half-bridge Converter Topology for Power Quality Compensation[J].IEE Proceedings on Electric Power Applications,2002,149(5):351-359.
[12]Hung Yu-Chieh,Shyu Fu-San,Lin Chih Jung,et al.New Voltage Balance Technique for Capacitors of Symmetrical Halfbridge Converter with Current Mode Control[C]//International Conference on Power Electronics&Drive Systems,PEDS,2003:365-369.
[13]朱军卫,龚春英.半桥逆变器电容不均压问题的分析与研究[C]//第十五届全国电源技术年会论文集,上海,2003:310-313.
[14]陈东华,谢少军.电流型控制半桥逆变器研究(Ⅰ)--直流分压电容不均压问题[J].电工技术学报,2004,19(4):85-88.
[15]陈东华,谢少军.电流型控制半桥逆变器研究(Ⅱ)--直流分压电容不均压问题[J].电工技术学报,2004,19(6):69-73.
[16]杨水涛,张帆,刘金云,等.一种新型半桥逆变器电容均压控制策略[J].电工技术学报,2006,21(7):31-36.
[17]刘征威,孙丽娜,陈新.全数字半桥PWM整流器电容均压控制策略研究[J].电力电子技术,2010,44(2):92-94.
[18]阮新波,危健,薛雅丽.非隔离三电平变换器中分压电容均压的一种方法[J].中国电工技术学报,2003,23(10):28-31.
[19]王万宝,张犁,胡海兵,等.单相半桥三电平并网逆变器中点电压不平衡机理及其均压控制策略[J].中国电机工程学报,2014,34(6):839-845.
[20]贾娜,吴锐,陈中圆,等.单相半桥逆变器电容电压不平衡研究[C]//第四届电能质量及柔性输电技术研讨会,呼和浩特,2012:303-306.