开关器件承受电压不高于直流电源电压的无源谐振极逆变器

发布时间：2018-04-04 00:36

本文选题：零电压关断　切入点：零电流开通　出处：《中国电机工程学报》2017年15期

【摘要】：为提高逆变器转换效率,提出了一种主开关承受电压不高于直流电源电压的无辅助开关的谐振极逆变器。与硬开关逆变器相比,该软开关逆变器通过增加由少量无源器件组成的谐振电路,能使开关器件在开通瞬间完成零电流开通,在关断瞬间完成零电压关断。此外,该谐振极逆变器在死区时间内输出相电流可通过辅助电路续流,有利于减小低输出频率下的相电流畸变率。依据不同工作模式下的等效电路图,分析工作原理,说明了软开关实现条件,完成了辅助电路功耗的理论分析,并给出了参数设计过程。制作一台10k W的三相实验样机,实验结果表明逆变器的开关器件实现了软开关,而且输出相电流在低频下无畸变。因此,该软开关逆变器具有开关损耗低和输出电流畸变率低的优点。
[Abstract]:In order to improve the conversion efficiency of the inverter, a resonant pole inverter with no auxiliary switch with the main switch bearing voltage not higher than the DC power supply voltage is proposed.Compared with the hard-switching inverter, the soft-switching inverter can make the switch complete zero current switching on and zero voltage turn-off at turn off by adding a few resonant circuits composed of passive devices.In addition, the output phase current of the resonant pole inverter can be renewed by the auxiliary circuit in the dead time, which is helpful to reduce the distortion rate of the phase current at low output frequency.According to the equivalent circuit diagram of different working modes, the working principle is analyzed, the realization condition of soft switch is explained, the theoretical analysis of power consumption of auxiliary circuit is completed, and the design process of parameters is given.A 10 kW three-phase experimental prototype is made. The experimental results show that the switching device of the inverter achieves soft switching, and the output phase current has no distortion at low frequency.Therefore, the soft-switching inverter has the advantages of low switching loss and low output current distortion.
【作者单位】：辽宁石油化工大学信息与控制工程学院;
【基金】：国家自然科学基金项目(51207069) 辽宁省自然科学基金指导计划项目(20170540586) 辽宁石油化工大学国家级科研项目培育基金资助项目(2016PY-016)~~
【分类号】：TM464

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