Soft Switching Voltage Source Inverter with Parallel Resonant DC Link

WANG Qiang; XING Yan

doi:10.3969/j.issn.0372-2112.2013.11.033

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Soft Switching Voltage Source Inverter with Parallel Resonant DC Link

更新时间：2025-07-16

- Soft Switching Voltage Source Inverter with Parallel Resonant DC Link
- Acta Electronica Sinica Vol. 41, Issue 11, Pages: 2317-2320(2013)
- 作者机构：
  
  1. 辽宁石油化工大学信息与控制工程学院,辽宁,抚顺,113001
  2. 南京航空航天大学新能源发电与电能变换重点实验室,江苏,南京,210016
  3. 辽宁石油化工大学信息与控制工程学院,辽宁,抚顺,113001
  4. 南京航空航天大学新能源发电与电能变换重点实验室,江苏,南京,210016
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.51207069);China Postdoctoral Science Foundation (No.2013M531349);Research Project of Education Department of Liaoning Province (No.L2013146);Funded by Postgraduate Science Research Program of Jiangsu Province (No.1301105C)
- DOI：10.3969/j.issn.0372-2112.2013.11.033
  CLC： TM464
- Published：2013
- 稿件说明：
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WANG Qiang, XING Yan. Soft Switching Voltage Source Inverter with Parallel Resonant DC Link[J]. Acta Electronica Sinica, 2013, 41(11): 2317-2320.
DOI：

WANG Qiang, XING Yan. Soft Switching Voltage Source Inverter with Parallel Resonant DC Link[J]. Acta Electronica Sinica, 2013, 41(11): 2317-2320. DOI： 10.3969/j.issn.0372-2112.2013.11.033.

摘要

为提高逆变器的变换效率，提出了一种具有并联谐振直流环节的新型软开关电压源逆变器的拓扑结构.通过在传统硬开关逆变器的直流环节添加辅助谐振单元，使直流母线电压周期性地归零，实现逆变桥开关器件在零电压条件下完成切换，而且辅助开关器件也可以实现零电压开关或零电流开关.此外，电路中避免了使用大电容，没有中性点电位的变化问题.文中对其工作原理进行分析，给出不同工作模式下的等效电路图.制作一个5 kW的实验样机，实验结果表明该并联谐振直流环节软开关逆变器的主开关实现了零电压开关，在额定输出功率下，相比于硬开关逆变器，效率提高了3%.

Abstract

This paper proposes a novel soft-switching voltage source inverter with parallel resonant DC link to improve efficiency of inverter.We added auxiliary resonant unit to DC link of conventional inverter to make DC-bus voltage decreased to zero periodically

which realized zero-voltage operation of all switching devices in inverter.Furthermore

we also operated auxiliary switches under zero voltage switching or zero current switching.In addition

we avoided the bulk capacitor in the circuit and there was no center tap potential variation problem.We analyzed the operation principle and presented the equivalent circuits at different operation modes.We had built a 5kW laboratory prototype.Experimental results show that we can operate main switching devices under zero voltage and enhance the efficiency by 3% under rating power

compared with hard-switching inverter.

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