Modeling and analysis of the cascaded h-bridge multilevel inverter using RMS feedback control

2012 ◽  
Author(s):  
Yufei Li ◽  
Yue Wang ◽  
Yupeng Feng ◽  
Jinlong Wu ◽  
Jinjun Liu
Keyword(s):  
Feedback Control ◽  
Multilevel Inverter ◽  
Modeling And Analysis

Active Stabilization of Compressor Instability and Surge in a Working Engine

1993 ◽  
Vol 115 (1) ◽  
pp. 68-75 ◽  
Author(s):  
J. E. Ffowcs Williams ◽  
M. F. L. Harper ◽  
D. J. Allwright
Keyword(s):  
Feedback Control ◽  
Rotating Stall ◽  
Linear Feedback ◽  
Linear Feedback Control ◽  
Modeling And Analysis ◽  
Flow Phenomenon ◽  
Auxiliary Power Unit ◽  
Auxiliary Power ◽  
Active Stabilization ◽  
Shaft Power

We have applied feedback control to the compressor of a 45 kW auxiliary power unit. Using this, the engine is able to deliver more than 10 percent extra shaft power before surge occurs. We achieve control by suppressing a nonaxisymmetric flow phenomenon in the diffuser of the centrifugal compressor. Control is effected by modulating a small extra airflow into the impeller. We present results of modeling and analysis suggesting that linear feedback control will be sufficient to stabilize a compression system, even when both axisymmetric surge and rotating stall are present as possible instabilities.

Design of Hybrid-Multilevel Inverter with Feedback Control

2012 ◽  
Vol 12 (1) ◽  
pp. 13-18
Author(s):  
Jyh-Wei Chen ◽  
Chi-Yuan Wang ◽  
Chi-Hou Chen ◽  
Zhi-Xiang Huang ◽  
Chun-Ta Chen ◽  
...  
Keyword(s):  
Feedback Control ◽  
Multilevel Inverter
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