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| Analysis and Precise Modeling of Digital Active EMI Filter |
| Ji Junpeng1, 2, Chen Wenjie1, Lu Jingjie2, Zeng Guang2, Hua Zhiguang2 |
1. School of Electrical Engineering Xi’an Jiaotong University Xi’an 710049 China;
2. Department of Electrical Engineering Xi’an University of Technology Xi’an 710048 China |
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Abstract Digital active EMI filter (DAEF) technique is a new direction of the conductive EMI suppression technologies for switching power converter. However, given that the traditional model of DAEF system can not describe the system behavior, this paper proposed a precise system model. The model considered the passive device parasitic parameters of the sensed circuit, the injected circuit and the decoupled circuit. On the other hand, this model considered the delay time of the digital control system. The model can describe the system behavior accurately, and reflect the system performance accurately. It is verified that the precise model can predict the system performance accurately by the simulation result and the experiment result.
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Received: 22 April 2015
Published: 18 August 2016
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2015, Vol. 30 
