Power Balance Control in an AC-DC-AC Converter for Regenerative Braking in a Two-Voltage-Level Flywheel-Based DrivelineReport as inadecuate

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International Journal of Vehicular TechnologyVolume 2011 2011, Article ID 934023, 9 pages

Research ArticleDivision for Electricity, Department of Engineering Sciences, Uppsala University, P.O. Box 534, 75121 Uppsala, Sweden

Received 10 May 2011; Revised 2 August 2011; Accepted 24 August 2011

Academic Editor: Shinsuke Hara

Copyright © 2011 Janaína G. Oliveira et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The integration of a flywheel as a power handling can increase the energy storage capacity and reduce the number of battery charge-discharge cycles. Furthermore, the ability of recovering energy of the vehicle during breaking can increase the system efficiency. The flywheel-based all-electric driveline investigated here has its novelty in the use of a double-wound flywheel motor-generator, which divides the system in two different voltage levels, enhancing the efficiency of the electric driveline. The connection of two AC electrical machines i.e., the flywheel and the wheel motor with different and variable operation frequency is challenging. A power matching control applied to an AC-DC-AC converter has been implemented. The AC-DC-AC converter regenerates the electric power converted during braking to the flywheel machine, used here as power handling device. By controlling the power balance, the same hardware can be used for acceleration and braking, providing the reduction of harmonics and robust response. A simulation of the complete system during braking mode has been performed both in Matlab and Simulink, and their results have been compared. The functionality of the proposed control has been shown and discussed, with full regeneration achieved. A round-trip efficiency wheel to wheel higher than 80% has been obtained.

Author: Janaína G. Oliveira, Johan Lundin, and Hans Bernhoff

Source: https://www.hindawi.com/


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