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| Modeling and Analysis of Inverter With Hysteretic Current Control |
| Wang Jianhua1, Zhang Fanghua1, Gong Chunying1, Liu Lei2 |
| 1. Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 2. Nari-Relays Electric Co. Ltd. Nanjing 211102 China |
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Abstract In this paper, a small signal model of hysteretic current mode control with variable frequency and fixed hysteretic band is presented, based on three terminal switch cell of Buck converter in continuous current mode. This model reveals that the average current is the control target of hysteretic control. And phase lag of current loop with high switching frequency is quite small that makes current loop equivalent power stage be a proportional component. The conclusion is also valid in large signal analysis. Then an averaged linear model of a single phase inverter is derived. The system closed loop characteristic equation order is reduced due to hysteretic current control introduced. And compensation principles of the single phase inverter are investigated with Routh criteria, which make a good comprise between stability and stable/dynamic performance.
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Received: 20 November 2008
Published: 04 March 2014
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2010, Vol. 25 
