Pulsewidth Modulation of Z-Source Inverters With Minimum Inductor Current Ripple
Pulsewidth Modulation of Z-Source Inverters With Minimum Inductor Current Ripple
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DOI：
10.1109/tie.2013.2240632
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发表时间：
2014-01-01
影响因子：
7.7
通讯作者：
Ding, Jiudong
中科院分区：
文献类型：
--
作者：
Tang, Yu;Xie, Shaojun;Ding, Jiudong
提出了一种具有最小电感电流涟漪的Z源逆变器脉宽调制策略。在现有的单相直通PWM控制策略中，由于将直通时间分为6个相等的部分，因此三相桥臂承担相等的直通时间。以这种方式，容易实现直通状态的分配和布置，但是电感器电流涟漪没有被优化。这导致使用相对较大的电感器。在所提出的PWM策略中，三相桥臂的直通时间间隔被计算并根据有效状态和零状态时间间隔重新排列，以实现Z源电感上的最小电流涟漪，同时保持相同的总直通时间间隔。详细分析了该PWM控制策略的工作原理，并对传统PWM控制策略和该PWM控制策略下的电流涟漪进行了比较。仿真和ZSI系列的实验结果验证了分析。
This paper proposes the pulsewidth modulation (PWM) strategy of Z-source inverters (ZSIs) with minimum inductor current ripple. In existing PWM strategy with single-phase shoot-through, the shoot-through time interval is divided into six equal parts, therefore the three phase legs bear the equal shoot-through time interval. In this manner, the allotment and arrangement of the shoot-through state is easy to realize, but the inductor current ripple is not optimized. This causes to use relatively large inductors. In the proposed PWM strategy, the shoot-through time intervals of three phase legs are calculated and rearranged according to the active state and zero state time intervals to achieve the minimum current ripple across the Z-source inductor, while maintaining the same total shoot-through time interval. The principle of the proposed PWM strategy is analyzed in detail, and the comparison of current ripple under the traditional and proposed PWM strategy is given. Simulation and experimental results on the series ZSI are shown to verify the analysis.