Wireless Charger Design of Robot Vacuum Cleaners with Power Repeaters for High Compatibility
- 1 Department of Electrical, Computer and Software Engineering, The University of Auckland, Auckland, New Zealand
- 2 Department of Electrical, Computer and Software Engineering, The University of Auckland, Auckland, New Zealand
- 3 Department of Electrical, Computer and Software Engineering, The University of Auckland, Auckland, New Zealand
Abstract
Curved coils constructed by flexible printed circuit board (PCB) or hand-wound Litz-wire have been steadily becoming popular due to its applicable potential on devices that have a curved body. Inductive Power Transfer (IPT) systems based on curved coils and flexible ferrite sheets may provide more flexible charging solutions for various electronic devices such as rice cookers and robot vacuum cleaners. Power repeaters are also used in IPT systems to extend wireless charging range by guiding magnetic fields to the receiving coil. The interaction of these three topics could be inspiring. In this paper, two adjustable power repeaters are applied to an IPT charging system with various curved receiving coils designed for vacuum cleaners. Two power repeaters share the identical structure as the Tx coil and could be rotated to mirror symmetrically. The input and output power are calculated by analyzing the equivalent circuit model. The self-inductance, mutual inductance, and coupling coefficient of the proposed system are obtained via finite element method simulation with variable rotating angles. Three typical IPT designs have also been simulated in ANSYS Maxwell and compared with the proposed magnetic design. The comparison indicates the enhancing feature of the passive power repeaters on coupling performance and the ability to guide the magnetic flux for better magnetic field coupling. Furthermore, two types of co-simulations defined by the power source via Simplorer are conducted to explore how much power could be transferred. The tuned system is shown to be able to provide about 32 W under 100 kHz operating frequency for charging the battery of a robot vacuum cleaner. The results from theoretical calculation and simulation align well with each other.
- Zaheer, A., Covic, G.A. and Kacprzak, D. (2014) A Bipolar Pad in a 10-kHz 300-W Distributed IPT System for AGV Applications. IEEE Transactions on Industrial Electronics, 61, 3288-3301. https://doi.org/10.1109/TIE.2013.2281167
- Jeong, S., Kim, D.-H., Song, J., Kim, H., Lee, S., Song, C., Lee, J., Song, J. and Kim, J. (2019) Smartwatch Strap Wireless Power Transfer System with Flexible PCB Coil and Shielding Material. IEEE Transactions on Industrial Electronics, 66, 4054-4064. https://doi.org/10.1109/TIE.2018.2860534
- Tran, D.H., Vu, V.B. and Choi, W. (2018) Design of a High-Efficiency Wireless Power Transfer System with Intermediate Coils for the On-Board Chargers of Electric Vehicles. IEEE Transactions on Power Electronics, 33, 175-187. https://doi.org/10.1109/TPEL.2017.2662067
- Bu, Y., Endo, S. and Mizuno, T. (2018) Improvement in the Transmission Efficiency of EV Wireless Power Transfer System Using a Magnetoplated Aluminum Pipe. IEEE Transactions on Magnetics, 54, 1-5. https://doi.org/10.1109/TMAG.2018.2840109
- Campi, T., Cruciani, S., De Santis, V., Maradei, F. and Feliziani, M. (2018) Wireless Power Transfer (WPT) System for an Electric Vehicle (EV): How to Shield the Car from the Magnetic Field Generated by Two Planar Coils. Wireless Power Transfer, 5, 1-8. https://doi.org/10.1017/wpt.2017.17
- Moon, S. and Moon, G.-W. (2016) Wireless Power Transfer System with an Asymmetric Four-Coil Resonator for Electric Vehicle Battery Chargers. IEEE Transactions on Power Electronics, 31, 6844-6854.
- Wang, G., Liu, W., Sivaprakasam, M. and Kendir, G.A. (2005) Design and Analysis of an Adaptive Transcutaneous Power Telemetry for Biomedical Implants. IEEE Transactions on Circuits and Systems I: Regular Papers, 52, 2109-2117. https://doi.org/10.1109/TCSI.2005.852923
- Gyu, B.J. and Cho, B.H. (1998) An Energy Transmission System for an Artificial Heart Using Leakage Inductance Compensation of Transcutaneous Transformer. IEEE Transactions on Power Electronics, 13, 1013-1022. https://doi.org/10.1109/63.728328
- James, J.E.I., Chu, A., Robertson, D., Sabitov, A. and Covic, G.A. (2011) A Series Tuned High Power IPT Stage Lighting Controller. 2011 IEEE Energy Conversion Congress and Exposition, Phoenix, AZ, 17-22 September 2011, 2843-2849. https://doi.org/10.1109/ECCE.2011.6064151
- Yan, Z., Siyao, Q., Zhu, Q., Huang, L. and Hu, A.P. (2018) A Simple Brightness and Color Control Method for LED Lighting Based on Wireless Power Transfer. IEEE Access, 6, 51477-51483. https://doi.org/10.1109/ACCESS.2018.2869883