Control method for cascaded H-bridge multilevel inverter failures

被引：0
|
作者：
Zang, Yi [1 ]
Wang, Xu [1 ]
Xu, Bin [1 ]
Liu, Jihong [1 ]
机构：
[1] Northeastern Univ, Inst Informat Sci & Engn, Shenyang, Liaoning, Peoples R China
来源：
WCICA 2006: SIXTH WORLD CONGRESS ON INTELLIGENT CONTROL AND AUTOMATION, VOLS 1-12, CONFERENCE PROCEEDINGS | 2006年
基金：
中国国家自然科学基金;
关键词：
cascaded H-bridges; multilevel inverter; fault tolerance; space vector;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
To increase the fault tolerance for cascaded H-bridge inverter, this paper presents a novel switch-based control method for operating the inverter when one or more switches are damaged. To control the inverter under faulty mode, only the faulty switches are disposed, the control signals for other switches in the faulty cell are modified according to the fault type. The influence of various faults on space vectors is analysed and the maximum achievable output voltage of the inverter with faulty switches is calculated. Compared with existing cell-based control methods, this method generates higher voltage space vector magnitudes and reduces the influence of switch problems on motor operation in most faulty modes, while keeping producing a balanced line to line voltage, the reliability of the system is then enhanced. The simulated results agree with the theoretical analysis.
引用
收藏
页码：8462 / +
页数：2
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