Mitigating Circulating Common-Mode Currents Between Parallel Soft-Switched Drive Systems

A mathematical model that Is developed for a generalized drive system, including common-mode passive and active elements, is used to explore the issues of paralleling soft-switched resonant dc-link drive systems. Differences between the modulation pattern for each drive system cause common voltage d...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2007-09, Vol.43 (5), p.1284-1294
Main Authors: Cuzner, R.M., Nowak, D.J., Bendre, A., Oriti, G., Julian, A.L.
Format: Article
Language:English
Subjects:
Active control
Circulating
Component
Control systems
Disturbances
drive system modeling
Drives
Electric potential
Electromagnetic interference
electromagnetic interference (EMI)
Harmonic distortion
Impedance
Industry Applications Society
Inverters
Mathematical model
Mathematical models
Modulation
paralleling power converters
Resonance
soft-switched power converters
Voltage
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Description
Summary:A mathematical model that Is developed for a generalized drive system, including common-mode passive and active elements, is used to explore the issues of paralleling soft-switched resonant dc-link drive systems. Differences between the modulation pattern for each drive system cause common voltage disturbances, which lead to significant circulating currents between the drive systems. Control methods for actively compensating for common-mode circulating currents or reducing the common- mode voltage disturbances are investigated. Practical modifications to the drive system controls are implemented to reduce the circulating currents between paralleled systems.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2007.904415