新型无源钳位谐振直流环节逆变器

发布时间：2018-05-11 17:01

本文选题：软开关 + 逆变器　；参考：《中国电机工程学报》2017年12期

【摘要】：为解决有源钳位谐振直流环节逆变器钳位电路中需设置独立钳位电源(通常用大电容代替)及辅助电路含有多个辅助开关器件的问题,设计出一种新型无源钳位谐振直流环节逆变器的拓扑结构。这种新型逆变器的钳位电路中无独立设置的钳位电源,在耦合电感的作用下,可将该逆变器的直流环节电压钳位在输入直流电压的1.1~1.3倍,有效地降低了电压应力。辅助谐振电路中只有一个辅助开关器件,有利于简化控制和降低硬件成本。根据各个阶段下的等效电路,分析了电路的工作过程和软开关实现条件,并进行了实验验证,实验结果表明开关器件实现了软开关,而且在额定功率3k W下,逆变器效率达到96%。因此,该拓扑结构能够有效地降低开关损耗,并提高工作效率。
[Abstract]:In order to solve the problem that the clamping circuit of active clamping resonant DC link inverter needs to be equipped with independent clamping power supply (usually replaced by large capacitance) and that the auxiliary circuit contains several auxiliary switch devices. A new type of passive clamping resonant DC link inverter is designed. There is no independent clamping power supply in the clamping circuit of the new inverter. Under the action of the coupling inductor, the voltage clamp of the DC link of the inverter can be placed 1.3 times as much as the input DC voltage, thus effectively reducing the voltage stress. There is only one auxiliary switch in the auxiliary resonant circuit, which can simplify the control and reduce the hardware cost. According to the equivalent circuit of each stage, the working process of the circuit and the condition of the soft switch are analyzed, and the experimental results show that the switching device realizes the soft switch, and the efficiency of the inverter reaches 96 under the rated power of 3 kW. Therefore, the topology can effectively reduce the switching loss and improve the efficiency.
【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)~~
【分类号】：TM464

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