Analysis and Implementation of A Passive Lossless Soft-Switching Snubber for PWM Inverters

被引:48
作者
Zhang, Huaguang [1 ,2 ,3 ]
Wang, Qiang [4 ]
Chu, Enhui
Liu, Xiuchong
Hou, Limin [5 ]
机构
[1] Northeastern Univ, Natl Educ Minist, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Natl Educ Minist, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China
[3] Northeastern Univ, Natl Educ Minist, Key Lab Integrated Automat Proc Ind, Shenyang 110819, Peoples R China
[4] Liaoning Shihua Univ, Coll Informat & Control Engn, Fushun 113001, Peoples R China
[5] Liaoning Tech Univ, Coll Elect & Control Engn, Huludao 125105, Peoples R China
基金
中国国家自然科学基金;
关键词
Dead time; pulse width modulation (PWM); soft-switching inverters; zero-current turn ON; zero-voltage turn OFF; FULL-BRIDGE CONVERTER; DC-SIGNAL INJECTION; ZERO-VOLTAGE; THERMAL PROTECTION; ENGINEERING DESIGN; MINIMUM VOLTAGE; LINK INVERTER; TURN-ON; CIRCUIT; TRANSFORMER;
D O I
10.1109/TPEL.2010.2054836
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, a passive lossless snubber circuit for pulse width modulation (PWM) inverters is proposed to achieve soft-switching purpose without extra switch or additional control circuitry. This passive lossless soft-switching snubber employs an inductor/capacitor snubber structure for each switching device in an inverter to achieve passive zero-current turn ON and zero-voltage turn OFF. Furthermore, inductors coupled closely on a single core are used to losslessly recover snubber energy to the input in the proposed snubber. In addition, freewheeling of output phase current of inverters can be realized via energy storage components of the snubber during the dead time to reduce the effect of dead time. The distortion ratio of the output phase current in low output frequency is also reduced. All components in the snubber circuit are passive, and thus have a better price/performance ratio than their active counterparts. The proposed snubber has been incorporated into a 14-kW PWM inverter. Experimental results are given to demonstrate the validity and features of the snubber.
引用
收藏
页码:411 / 426
页数:16
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