Retractable Wireless Charging Windings for Inspection Robots
Source abstract
Abstract
Limited battery life compromises the usability of inspection and operation robots in hazardous environments such as nuclear sites under decommissioning. Both manually replacing the batteries and installing charging bays may be infeasible. Inductive wireless power transfer is a possible solution to deliver power through barriers such as reinforced concrete walls without physical contact. However, when requiring decent power (e.g., 100 W) to be transmitted over longer distances, the exaggerated dimensions of transmitting and receiving coils restrain the integrations with mobile robots. In this paper, a novel retractable design of the coil used in an inductive wireless power charging system is proposed, proving the minor deformation of the winding shape does not affect the transmission efficiency. A prototype with 5× size compression is implemented and tested. It successfully transmits 116.5 W over a distance of 1 m with 68.72% energy efficiency. The principle can be applied to a wide range of mobile platforms with a limited payload area where remote power is needed.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Wireless Power Transfer Systems · Energy Harvesting in Wireless Networks · RFID technology advancements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Funding
UKRI
References (39)
Show source-provided references
1. Limitations of wireless power transfer technologies for mobile robots10.1017/wpt.2019.8 ↗
2. ANYmal—Toward legged robots for harsh environments10.1080/01691864.2017.1378591 ↗
3. Li, B., Zhu, Y., Wang, Z., Li, C., Peng, Z.R., and Ge, L. (2018). Use of Multi-Rotor Unmanned Aerial Vehicles for Radioactive Source Search. Remote Sens., 10.10.3390/rs10050728 ↗
4. Application of airborne photogrammetry for the visualisation and assessment of contamination migration arising from a Fukushima waste storage facility10.1016/j.envpol.2017.10.098 ↗
5. Advanced Navigation (2024, August 02). Hydrus-300; Advanced Navigation: 2024. Available online: https://www.advancednavigation.com/wp-content/uploads/2024/04/Hydrus-Reference-Manual-v1.2.pdf.
6. Differential Pressure Sensor Speedometer for Autonomous Underwater Vehicle Velocity Estimation10.1109/JOE.2019.2907822 ↗
7. West, C., Cheah, W., Rajasekaran, V., West, A., Arvin, F., Watson, S., Giuliani, M., Stolkin, R., and Lennox, B. (2019, January 24). Development of a Debris Clearance Vehicle for Limited Access Environments. Proceedings of the UK-RAS Conference on ‘Embedded Intelligence’, Loughborough, UK.10.31256/UKRAS19.6 ↗
8. Althoefer, K., Konstantinova, J., and Zhang, K. (2019). A Debris Clearance Robot for Extreme Environments. Proceedings of the Towards Autonomous Robotic Systems, Springer.10.1007/978-3-030-25332-5 ↗
9. Wireless Power Transfer and Energy Harvesting: Current Status and Future Prospects10.1109/MWC.2019.1800378 ↗
10. Huda, S.M.A., Arafat, M.Y., and Moh, S. (2022). Wireless Power Transfer in Wirelessly Powered Sensor Networks: A Review of Recent Progress. Sensors, 22.10.3390/s22082952 ↗
11. A review of Li-ion batteries for autonomous mobile robots: Perspectives and outlook for the future10.1016/j.jpowsour.2022.231943 ↗
12. Near-Field Reduction in a Wireless Power Transfer System Using LCC Compensation10.1109/TEMC.2016.2641383 ↗
13. HEBI Robotics (2024, August 02). “Lily” R-Series 18-DoF Hexapod. HEBI Robotics. [Online]. Available online: https://docs.hebi.us/resources/kits/datasheets/r-series/A-2257-01_Datasheet.pdf.
14. Field Application of UAS-Based Bridge Inspection10.1177/0361198118780825 ↗
15. DJI Enterprise (2024, August 02). Matrice 300 RTK. DJI Enterprise. [Online]. Available online: https://dl.djicdn.com/downloads/matrice-300/20230518UM/M300_RTK_User_Manual_EN_v4.0.pdf.
16. Tarwadi, P., Shiraki, Y., Ganoni, O., Wei, S., Ahn, H.S., and MacDonald, B. (2020). Design and Development of a Robotic Vehicle for Shallow-Water Marine Inspections. arXiv.
17. A Critical Review of Recent Progress in Mid-Range Wireless Power Transfer10.1109/TPEL.2013.2249670 ↗
18. A review of wireless power transfer for electric vehicles: Prospects to enhance sustainable mobility10.1016/j.apenergy.2016.07.003 ↗
19. Zhang, J., Yao, S., Pan, L., Liu, Y., and Zhu, C. (2023). A Review of Capacitive Power Transfer Technology for Electric Vehicle Applications. Electronics, 12.10.3390/electronics12163534 ↗
20. Design and implementation of autonomous wireless charging station for rotary-wing UAVs10.1016/j.ast.2016.04.023 ↗
21. Zhang, C., Chen, X., Chen, K., and Lin, D. (2022). IPTVisual: Visualisation of the Spatial Energy Flows in Inductive Power Transfer Systems with Arbitrary Winding Shapes. World Electr. Veh. J., 13.10.3390/wevj13040063 ↗
22. Design of DD Coil With High Misalignment Tolerance and Low EMF Emissions for Wireless Electric Vehicle Charging Systems10.1109/TPEL.2020.2971967 ↗
23. Adaptive Frequency Control of a Sensorless-Receiver Inductive Wireless Power Transfer System Based on Mixed-Compensation Topology10.1109/TPEL.2020.3000455 ↗
24. Experiments on wireless power transfer with metamaterials10.1063/1.3601927 ↗
25. A double-sided LCLC-compensated capacitive power transfer system for electric vehicle charging10.1109/TPEL.2015.2446891 ↗
26. Huda, M.N., Wang, M., and Kalganova, T. (2025). Resonant Inductive Coupling Power Transfer for Mid-Sized Inspection Robot. Proceedings of the Towards Autonomous Robotic Systems, Springer.
27. Detka, K., and Górecki, K. (2022). Wireless Power Transfer—A Review. Energies, 15.10.3390/en15197236 ↗
28. Schumaker, L.L. (2024). Spline Functions: More Computational Methods, SIAM.10.1137/1.9781611978186 ↗
29. Wang, H., Zhang, C., and Hui, S.Y.R. (2019, January 18-21). Visualization of Energy Flow in Wireless Power Transfer Systems. Proceedings of the 2019 IEEE Wireless Power Transfer Conference (WPTC), London, UK.10.1109/WPTC45513.2019.9055544 ↗
30. FASTHENRY: A multipole-accelerated 3-D inductance extraction program10.1109/22.310584 ↗
31. Püschel, M., and Seliger, N. (2025, January 22-30). Multiple-Frequency Three Coil Inductive Power Transmission with Non-Linear Relay Resonator. Proceedings of the SoutheastCon 2025, Concord, NC, USA.10.1109/SoutheastCon56624.2025.10971670 ↗
32. Calculation Inductance of Toroidal Inductor Wound by Rectangular Cross-Sectional Wire10.1109/TPS.2021.3101570 ↗
33. Mutual Inductance Calculation Between Circular Filaments Arbitrarily Positioned in Space: Alternative to Grover’s Formula10.1109/TMAG.2010.2047651 ↗
34. A Comprehensive Investigation of Thermal Risks in Wireless EV Chargers Considering Spatial Misalignment From a Dynamic Perspective10.1109/JESTIE.2024.3417244 ↗
35. Origami Inductor: Foldable 3-D Polyhedron Multiphase Air-Coupled Inductors with Flux Cancellation and Faster Transient10.1109/TPEL.2024.3374572 ↗
36. Stepins, D., Sokolovs, A., and Zakis, J. (2024). Dynamic Resonant-Inductive Wireless Power Transfer System for Automated Guided Vehicles with Reduced Number of Position Sensors. Electronics, 13.10.3390/electronics13122377 ↗
37. Dynamic wireless power transfer for warehouse robots10.4186/ej.2021.25.10.61 ↗
38. Wireless Power Transfer System for Mobile Robots with Impedance Matching by Adjusting Position of Driver Coil
39. UAV-Enabled Wireless Power Transfer With Base Station Charging and UAV Power Consumption10.1109/TVT.2020.3015246 ↗