Abstract：A novel parallel resonant DC link soft-switching inverter was proposed to overcome the drawbacks of the conventional hard-switching inverter. The coupled resonant inductors were in the auxiliary resonant circuit and the topology was relatively simple, which could reduce the cost of hardware. When DC-bus voltage decreased to zero via the resonance of the auxiliary circuit, zero-voltage operation of all main switching devices in inverter could be realized. Auxiliary switching devices could also be operated under soft-switching in the resonant process. Furthermore, the duration time of zero voltage was freely selected and was independent of load current and resonant parameters. The operation principle was analyzed based on the equivalent circuits at different operation modes. The conditions of soft-switching and the control method of the inverter were also achieved. A140Wlaboratory prototype had been built. The experimental results demonstrated that soft-switching operation of all switching devices could be realized. Therefore, the soft-switching inverter presented can effectively reduce switching loss and improve efficiency.
王强, 刘岩松, 陈祥雪, 王天施, 刘晓琴. 具有简单辅助电路的并联谐振直流环节软开关逆变器[J]. 电工技术学报, 2014, 29(6): 91-97.
Wang Qiang , Liu Yansong , Chen Xiangxue , Wang Tianshi , Liu Xiaoqin. Parallel Resonant DC Link Soft-Switching Inverter with a Simple Auxiliary Circuit. Transactions of China Electrotechnical Society, 2014, 29(6): 91-97.
[1] 潘三博, 潘俊民. 一种新型的零电压谐振极型逆变器[J]. 中国电机工程学报, 2006, 26(24): 55-59. Pan Sanbo, Pan Junmin. A novel zero-voltage switching resonant pole inverter[J]. Proceedings of the CSEE, 2006, 26(24): 55-59. [2] 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): 131-139. [3] 张化光, 王强, 褚恩辉, 等. 新型谐振直流环节软开关逆变器[J]. 中国电机工程学报, 2010, 30(3): 21-27. Zhang Huaguang, Wang Qiang, Chu Enhui, et al. A novel resonant DC link soft-switching inverter[J]. Proceedings of the CSEE, 2010, 30(3): 21-27. [4] 王军, 徐龙祥. 软开关技术在磁悬浮轴承功率放大器中的应用[J]. 电工技术学报, 2009, 24(6): 85-90. Wang Jun, Xu Longxiang. Application of power amplifier for active magnetic bearing using soft- switching technology[J]. Transactions of China Electrotechnical Society, 2009, 24(6): 85-90. [5] 王军, 徐龙祥. 磁悬浮轴承并联谐振直流环节开关功率放大器[J]. 中国电机工程学报, 2009, 29(12): 87-92. Wang Jun, Xu Longxiang. Parallel resonant DC link soft-switching power amplifier of magnetic bearing[J]. Proceedings of the CSEE, 2009, 29(12): 87-92． [6] 王强. 无中性点电位变化的并联谐振软开关逆变器[J]. 中国电机工程学报, 2012, 32(3): 36-42. Wang Qiang. Parallel resonant soft-switching inverter without change of neutral point potential[J]. Proceedings of the CSEE, 2012, 32(3): 36-42. [7] 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): 74-80. Wang Qiang. Novel zero-voltage switching resonant DC link inverter[J]. Proceedings of the CSEE, 2011, 31(27): 74-80. [8] 王强. 零电压持续时间不依赖于负载电流的谐振直流环节逆变器[J]. 中国电机工程学报, 2012, 32(6): 33-39. Wang Qiang. Resonant DC link inverter with duration of zero-voltage independent of load current[J]. Proceedings of the CSEE, 2012, 32(6): 33-39. [9] 潘三博, 陈宗祥, 潘俊民. 一种新型直流环节谐振逆变器的空间矢量脉宽调制方法[J]. 中国电机工程学报, 2007, 27(1): 65-69. Pan Sanbo, Chen Zongxiang, Pan Junmin. A novel SVPWM method for DC rail resonant inverter[J]. Proceedings of the CSEE, 2007, 27(1): 65-69. [10] 王强. 无中性点电位变化的辅助谐振变换极逆变器[J]. 中国电机工程学报, 2011, 31(18): 27-32. Wang Qiang. Auxiliary resonant commutated pole inverter without change of neutral point potential[J]. Proceedings of the CSEE, 2011, 31(18): 27-32.
2014, Vol. 29 
