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EMI noise could bring electromechanical damages to the motors as well as reduce the stability of AC traction system. Since the high frequency noises propagate paths are quite complicated compared with fundamental frequency components, the high frequency EMI noise coupled through system's parasitic parameters is difficult to analyze and eliminated. In this paper, a common-mode equivalent circuit as...
This paper develops a common-mode (CM) electromagnetic interference noise model for a three-level neutral point clamped topology. Compared with existing modeling techniques with only one CM noise source, two extra important CM noise sources and their characteristics are identified and derived for an accurate CM noise model. The impedances of CM noise path are also extracted. Based on the developed...
With the PWM techniques widely applied in motor drive systems, the impact of the electromagnetic interference (EMI) in adjustable speed drive (ASD) system cannot be ignored. EMI noise in motor drive systems could bring electromechanical damages to the motors as well as reduce the stability of the ASD system. Since the high frequency noises propagate paths are quite complicated compared with fundamental...
The plane traveling wave tubes are discussed in this paper, especially the photonic band gap (PBG) material substrate is used to replace the ceramic substrate to support the meander line slow wave structure.
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