单开关辅助换流的谐振直流环节PWM整流器
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摘要
为改善传统的脉冲宽度调制(PWM)整流器的运行效率,在直流环节增加与直流母线并联的辅助谐振电路,提出了一种谐振直流环节PWM整流器,其辅助电路只设置了1个辅助开关。在辅助谐振电路处于工作状态时,在每个开关周期内,主开关能完成零电压软切换动作,辅助开关能完成零电流切换动作,辅助谐振电路仅运行1次。详细说明了整流器在1个开关周期的工作过程,给出了设计规则,完成了对辅助电路损耗的数学建模。在10kW实验样机上的实验结果表明特征实验波形符合理论分析,开关器件实现了软切换。因此,该新型整流器处于高频和大功率运行状态时,能实现高效率运行。
In order to achieve high-efficiency of the conventional PWM rectifier, auxiliary resonant circuit which was in parallel with the DC bus was added in the DC link, and a resonant DC link PWM rectifier was put forward, with one auxiliary switch set in its auxiliary resonant circuit. In the process of commutation, zero-voltage switching was achieved in the main switch and zero-current switching was achieved in the auxiliary switch. Furthermore, the auxiliary circuit only needed to work for one time in each switching period. The commutation process of the rectifier was analyzed in detail to give out its mathematical model of auxiliary circuit loss, and the design rules were also given. The experimental results on the 10 kW prototype show that the characteristics of the experimental waveforms coincide with the theoretical analysis and the switches realize soft-switching. Therefore, the rectifier can be operated with high-efficiency, when it works with the high-frequency and high-power.
In order to achieve high-efficiency of the conventional PWM rectifier, auxiliary resonant circuit which was in parallel with the DC bus was added in the DC link, and a resonant DC link PWM rectifier was put forward, with one auxiliary switch set in its auxiliary resonant circuit. In the process of commutation, zero-voltage switching was achieved in the main switch and zero-current switching was achieved in the auxiliary switch. Furthermore, the auxiliary circuit only needed to work for one time in each switching period. The commutation process of the rectifier was analyzed in detail to give out its mathematical model of auxiliary circuit loss, and the design rules were also given. The experimental results on the 10 kW prototype show that the characteristics of the experimental waveforms coincide with the theoretical analysis and the switches realize soft-switching. Therefore, the rectifier can be operated with high-efficiency, when it works with the high-frequency and high-power.
引文
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[18] 王强,单瑞香,王天施,等.单相全桥谐振直流环节软开关逆变器[J].电机与控制学报,2017,21(3):38.WANG Qiang,SHAN Ruixiang,WANG Tianshi,et al.Single-phase full-bridge resonant DC-link soft-switching inverter[J].Electric Machines and Control,2017,21(3):38.
[19] 王强,唐朝垠,王天施,等.用于无刷直流电机驱动的谐振极软开关逆变器[J].电机与控制学报,2017,21(6):59.WANG Qiang,TANG Chaoyin,WANG Tianshi,et al.A resonant pole soft-switching inverter for brushless DC motor drives[J].Electric Machines and Control,2017,21(6):59.
[20] D CISCATO,L MALESANI,L ROSSETTO,et al.PWM rectifier with low dc voltage ripple for magnet supply[J].IEEE Transactions on Industry Applications,1992,28(3):414.
[2] 张兴,张崇巍.PWM整流器及其控制[M].北京:机械工业出版社,2013:85.
[3] Shen D,Lehn P W.Modeling,analysis,and control of a current source inverter-based STATCOM[J].IEEE Transactions on Power Delivery,2002,17(1):248.
[4] 马智远.零电压开关三相PWM整流器分析及调制策略研究[D].杭州:浙江大学,2011:32.
[5] 屈克庆.软开关三相PWM变流技术研究[D].上海:上海大学,2004:48.
[6] XU Dehong,BO Feng,LI Rui,et al.A zero voltage switching SVM (ZVS-SVM) controlled three-phase boost rectifier[J].IEEE Transactions on Industrial Electronics,2007,22(3):978.
[7] 李睿,马智远,徐德鸿.一种新型40 kW软开关三相脉宽调制整流器[J].中国电机工程学报,2011,31(33):93.LI Rui,MA Zhiyuan,XU Dehong.A novel 40 kW soft switching three-phase pulse width modulation rectifier[J].Proceedings of the CSEE,2011,31(33):93.
[8] 李锦,刘进军.有源中点钳位三电平零电流转换软开关变流器[J].电工技术学报,2013,28(3):195.LI Jin,LIU Jinjun.Three-level active neutral point clamped zero-current-transition converter[J].Transactions of China Electro Technical Society,2013,28(3):195.
[9] WU Jia,LEE FRED C,DUSHAN Boroyevich,et al.A 100 kW high-performance PWM rectifier with a ZCT soft-switching technique[J].IEEE Transactions on Power Electronics,2003,8(6):1302.
[10] 王强,王天施,孙海军,等.新型高效率并联谐振直流环节软开关逆变器[J].电工技术学报,2013,28(5):219.WANG Qiang,WANG Tianshi,SUN Haijun,et al.Novel high efficiency parallel resonant DC link soft-switching inverter[J].Transactions of China Electro Technical Society,2013,28(5):219.
[11] CHANG Jie,HU Jun.Modular design of soft-switching circuits for two-level and three-level inverter[J].IEEE Transactions on Power Electronics,2006,21(1):131.
[12] 王强.新型零电压开关谐振直流环节逆变器[J].中国电机工程学报,2011,31(27):74.WANG Qiang.Novel zero-voltage switching resonant DC link inverter[J].Proceedings of the CSEE,2011,31(27):74.
[13] 李睿,马智远,徐德鸿.一种高效率软开关三相并网逆变器[J].电力系统自动化,2011,35(3):62.LI Rui,MA Zhiyuan,XU Dehong.A high efficiency soft switching three-phase grid-connected inverter[J].Automation of Electric Power Systems,2011,35(3):62.
[14] 李睿,马智远,徐德鸿.一种新型有源箝位软开关三相并网逆变器[J].中国电机工程学报,2011,31(30):30.LI Rui,MA Zhiyuan,XU Dehong.A novel active clamping soft switching grid-connected three-phase inverter[J].Proceedings of the CSEE,2011,31(30):30.
[15] 王强,刘岩松,陈祥雪,等.具有低能耗辅助电路的并联谐振直流环节逆变器[J].电子学报,2014,42(7):1369.WANG Qiang,LIU Yansong,CHEN Xiangxue,et al.Parallel resonant DC link inverter with low-loss auxiliary circuit[J].Acta Electronic Sinica,2014,42(7):1369.
[16] HAN B M,MOON S I.Static reactive-power compensator using soft-switching current-source inverter[J].IEEE Transactions on Industrial Electronics,2001,48(6):1158.
[17] 陶礼学,姚钢,陈陈.一种新型PWM软开关整流器的仿真[J].电力系统及其自动化学报,2006,18(6):64.TAO Lixue,YAO Gang,CHEN Chen.Simulation on a novel PWM soft switch rectifier[J].Proceedings of the CSU-EPSA,2006,18(6):64.
[18] 王强,单瑞香,王天施,等.单相全桥谐振直流环节软开关逆变器[J].电机与控制学报,2017,21(3):38.WANG Qiang,SHAN Ruixiang,WANG Tianshi,et al.Single-phase full-bridge resonant DC-link soft-switching inverter[J].Electric Machines and Control,2017,21(3):38.
[19] 王强,唐朝垠,王天施,等.用于无刷直流电机驱动的谐振极软开关逆变器[J].电机与控制学报,2017,21(6):59.WANG Qiang,TANG Chaoyin,WANG Tianshi,et al.A resonant pole soft-switching inverter for brushless DC motor drives[J].Electric Machines and Control,2017,21(6):59.
[20] D CISCATO,L MALESANI,L ROSSETTO,et al.PWM rectifier with low dc voltage ripple for magnet supply[J].IEEE Transactions on Industry Applications,1992,28(3):414.