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Battery- and Power-Management for Mobile Devices

Wireless charging

 

Project leader
Univ.-Prof. Dr. Mario Huemer

Project staff
DI Andreas Berger

Project start
01.06.2013

Project description
In this project a wireless power transfer system based on the Qi standard specifications is investigated in detail. The system, shown in the following figure, uses inductive or non-resonant operation for the power transfer between two coupled inductors.
The efficiency and output power of this system heavily depend on the equivalent load impedance ZL. The optimization concept developed in this project uses this relation to optimize the operation conditions of the system in order to achieve efficiency improvements over common state-of-the-art optimization strategies. As a further benefit of the developed control approach, the extractable output power could be increased by a substantial amount.
For future investigations it is planned to have a look at high frequency resonant power transfer topologies. (FoDok)

Schematic sketch of the circuit

Publications

11) Berger A., Agostinelli M., Sandner C., Vesti S., Huemer M.: "High Efficient Integrated Power Receiver for a Qi Compliant Wireless Power Transfer System", in Proceedings of the IEEE Wireless Power Transfer Conference (WPTC 2016), IEEE, 2016.

10) Berger A., Agostinelli M., Vesti S., Oliver J., Cobos J., Huemer M.: "A Wireless Charging System Applying Phase-Shift and Amplitude Control to Maximize Efficiency and Extractable Power", in: IEEE Transactions on Power Electronics, Volume 30, Number 11, Page(s) 6338-6348, 2015, Open Access.

9) Unterrieder C., Zhang C., Lunglmayr M., Priewasser R., Marsili S., Huemer M., "Battery state-of-charge estimation using approximate least squares", In Journal of Power Sources, Volume 278, 15 March 2015, Pages 274-286, (ISSN 0378-7753), Open Access.

8) Berger A., Agostinelli M., Priewasser R., Marsili S., Huemer M.: "Unified Digital Sliding Mode Control with Inductor Current Ripple Reconstruction for DC-DC Converters", in: Proceedings of the International Symposium on Circuits and Systems (ISCAS 2015), Page(s) 213-216, IEEE, 2015.

7) Pathuri Bhuvana V., Huemer M., Tonello A.: "Battery Internal State Estimation Using a Mixed Kalman Cubature Filter", in: Proceedings of the IEEE International Conference on Smart Grid Communications (SmartGridComm 2015), 2015.

6) Berger A., Agostinelli M., Vesti S., Oliver J., Cobos J., Huemer M.: "Phase-Shift and Amplitude Control for an Active Rectifier to Maximize the Efficiency and Extracted Power of a Wireless Power Transfer System", in: Proceedings of the IEEE Applied Power Electronics Conference and Exposition (APEC 2015), Page(s) 1620-1624, 2015.

5) C. Unterrieder, M. Lunglmayr, S. Marsili and M. Huemer, ”Battery State-of-Charge Estimation Prototype using EMF Voltage Prediction,” accepted at the IEEE International Symposium on Circuits and Systems (ISCAS), Melbourne, Australia, June 2014. Accepted Version

4) Robert Priewasser, Matteo Agostinelli, Christoph Unterrieder, Stefano Marsili, Mario Huemer, “Modeling, Control and Implementation of DC-DC-Converters for Variable Frequency Operation,” In the IEEE Transactions on Power Electronics, Vol. 29, No. 1, pp. 287-301, January 2014 (ISSN: 0885-8993, DOI: 10.1109/TPEL.2013.2248751) Open Access.

3) Christoph Unterrieder, Robert Priewasser, Stefano Marsili, Mario Huemer, “Battery state estimation using mixed Kalman/H-infinity, adaptive Luenberger and sliding mode observer,” In the Proceedings of the IEEE Vehicle Power and Propulsion Conference (VPPC’ 2013), Beijing, China, pp. 71-76, October 2013. Accepted Version

2) Venkata Pathuri Bhuvana, Christoph Unterrieder, Mario Huemer, “Battery Internal State Estimation: A Comparative Study of Non-Linear State Estimation Algorithms,” In the Proceedings of the IEEE Vehicle Power and Propulsion Conference (VPPC’ 2013), Beijing, China, vol., no., pp.1-6,October 2013.

1) Andreas Berger, Matteo Agostinelli, Robert Priewasser, Stefano Marsili, Mario Huemer, “Universal Digital Sliding Mode Control for DC-DC Converters,” In the Proceedings of Austrochip 2013, Linz, Austria, pp. 23-28, October 2013.