Abstract
Focusing on the state-of-the-art conducted EMI prediction, this paper presents a noise source lumped circuit modeling and identification method, an EMI modeling method based on multiple slope approximation of switching transitions, and double Fourier integral method modeling PWM conversion units to achieve an accurate modeling of EMI noise source. Meanwhile, a new sensitivity analysis method, a general coupling model for steel ground loops, and a partial element equivalent circuit method are proposed to identify and characterize conducted EMI coupling paths. The EMI noise and propagation modeling provide an accurate prediction of conducted EMI in the entire frequency range (0–10 MHz) with good practicability and generality. Finally a new measurement approach is presented to identify the surface current of large dimensional metal shell. The proposed analytical modeling methodology is verified by experimental results.
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Supported by the National Natural Science Foundation of China (Grant No. 50721063)
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Ma, W., Zhao, Z., Meng, J. et al. Precise methods for conducted EMI modeling, analysis, and prediction. Sci. China Ser. E-Technol. Sci. 51, 641–655 (2008). https://doi.org/10.1007/s11431-008-0082-0
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DOI: https://doi.org/10.1007/s11431-008-0082-0