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The electromagnetic interference (EMI) filter plays an important role in the EMI noise suppression. As the development of the switch mode power supply (SMPS), the power density of the SMPS improves every year. As a result the distance between components becomes smaller and smaller. The near-field magnetic coupling between components becomes larger and larger. However there are fewer studies about...
The high frequency attenuation performance of an EMI filter is often deteriorated greatly by the stray electromagnetic field existing in interior or exterior of a filter. In this paper, the stray electromagnetic coupling factors in an EMI common mode filter are investigated by different experiments after theory analysis. A novel metal insulated grids method is proposed to separate electric and magnetic...
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