Omnidirectional Wireless Power Transfer System Using Modified Saddle-Shaped Coil Pair for Implantable Capsule Robots

Wireless power transfer (WPT) technology has been widely researched and developed, especially the omnidirectional WPT system. Despite much attention, the omnidirectional WPT system generating 3-D magnetic field is rarely reported for capsule robot (CR) applications. In this paper, we propose a genui...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on power electronics Vol. 38; no. 9; pp. 1 - 9
Main Authors Zhuang, Haoyu, Wang, Wei, Yan, Guozheng
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Capsule robot
Coils (windings)
Control methods
Couplings
Finite element method
Magnetic fields
Magnetic resonance imaging
Magnetometers
Mathematical analysis
Maximum power
omnidirectional system
Phase control
Power sources
power transfer efficiency
power transmitting coil
Robots
Topology
Tracking control
Voltage control
wireless power transfer
Wireless power transmission
Online AccessGet full text

Cover

More Information
Summary:Wireless power transfer (WPT) technology has been widely researched and developed, especially the omnidirectional WPT system. Despite much attention, the omnidirectional WPT system generating 3-D magnetic field is rarely reported for capsule robot (CR) applications. In this paper, we propose a genuine omnidirectional system for CR using only one pair of power transmitting coils (PTCs) and one power receiving coil (PRC) for the first time. The novel PTC with a compact and compatible structure is capable of generating 3-D magnetic field at any position. In particular, a single power source is solely utilized to drive the PTC without current amplitude or phase control methods. Based on the magnetic calculation and finite-element simulation, the geometric parameters of the proposed PTC structure are determined. Additionally, through the theoretical analysis and comparison with traditional topology, the capability of omnidirectional transfer can be verified. Furthermore, in order to dynamically adjust the PTC rotation, the corresponding received voltage tracking-based control strategy is also illustrated. Finally, a practical prototype is built, and experimental results confirm the omnidirectional WPT capability of the proposed system concerning both positions and attitudes, as well as the effectiveness of the control method. It demonstrates a maximum power delivered to the load of 2523 mW with a power transfer efficiency of 8.4%.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2023.3270501