具有大范围升-降压功能的新型单级逆变电路

发布时间：2018-06-17 03:25

本文选题：Z源逆变器 + 准Z源逆变器　；参考：《电工技术学报》2014年10期

【摘要】：提出一种具有大范围升-降压功能的单级逆变电路,简称高升压增益单级逆变器(HVRSSI)。研究了其具体的工作模式和升-降压功能的实现机理,推导了电路各部分的电压关系。该变换器利用独特的LC结构代替了传统电压源逆变器直流侧的电容,利用逆变器上下管的"直通"实现了直流链电压VPN的大范围升压功能,同时提高了逆变器的可靠性。和现有单级逆变电路(譬如ZSIs)不同,HVRSSI电路的升压比B和直通占空比Dsh成反比,在较小的直通占空比时能够得到较高的升压比,克服了Z源逆变器等受"直通占空比Dsh和调制因子M相互制约"的限制而升压能力不足的缺陷。高升压增益逆变电路输出交流电压随调制因子M的变化趋势和传统电压源逆变器一致,随M的增大而增大,不同于其他单级逆变器,该一致性使得调节更快捷。通过实验室设计的1k W样机对所提电路进行相关性能检测,实验结果与理论分析和仿真研究完全符合,验证了所提变换器的有效性和实用性。
[Abstract]:This paper presents a single stage inverter with a wide range of booster and step-down functions, which is referred to as a high boost gain single stage inverter (HVRSSI). The working mode and the realization mechanism of the rise-voltage function are studied, and the voltage relation of each part of the circuit is deduced. The converter uses the unique LC structure to replace the DC side capacitance of the traditional voltage source inverter, and realizes the wide range boost function of the DC chain voltage VPN by using the "through" of the upper and lower transistors of the inverter. At the same time, it improves the reliability of the inverter. Different from the existing single-stage inverter circuits (such as ZSIs), the boost ratio B and direct duty cycle Dsh of HVRSSI circuits are inversely proportional, and a higher boost ratio can be obtained when the duty cycle is small. The limitation of Z-source inverter such as "direct duty cycle Dsh and modulation factor M restrict each other" is overcome. The variation trend of output AC voltage with modulation factor M of high boost gain inverter is the same as that of traditional voltage source inverter, and increases with the increase of M, which is different from other single-stage inverters. A 1kW prototype designed in the laboratory is used to test the performance of the proposed circuit. The experimental results are in good agreement with the theoretical analysis and simulation, and the validity and practicability of the proposed converter are verified.
【作者单位】：青岛理工大学自动化工程学院;山东大学控制科学与工程学院;济南大学自动化与电气工程学院;
【基金】：国家自然科学基金(51477079) 山东省自然科学基金(ZR2013EEM020) 中国博士后科学基金(2013M531598)资助项目
【分类号】：TM464

【相似文献】