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Analysis of CM Volt-Second Influence on CM Inductor Saturation and Design for Input EMI Filters in Three-Phase DC-Fed Motor Drive Systems

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7 Author(s)
Fang Luo ; Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ. (Virginia Tech), Blacksburg, VA, USA ; Shuo Wang ; Fei Wang ; Boroyevich, D.
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Common-mode (CM) choke saturation is a practical problem in CM filter applications. It is generally believed that the leakage inductance of CM chokes makes the core saturated. This paper analyzes two new mechanisms for CM choke saturation due to CM voltage, and these mechanisms are verified in experiment. CM choke saturation is particularly important for motor drive systems, which have a high CM voltage and comparably higher stray grounding capacitance. A model is established to describe the relationship between the CM voltage and the volume of the CM magnetic components. According to the analysis, line impedance stabilization networks (LISNs) play an important role in the design of CM magnetic components.

Published in:

Power Electronics, IEEE Transactions on  (Volume:25 ,  Issue: 7 )

Date of Publication:

July 2010

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