A Full-Freedom Wireless Power Transfer for Spheroid Joints

A full-freedom wireless power transfer for spheroid joints is proposed to solve the problem of power transmission between the caput-articularis and the acetabulum in a spheroid joint. According to the characteristics of the spheroid joint, a hemispherical coil and a spherical coil are designed havin...

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Bibliographic Details
Published inIEEE access Vol. 7; pp. 18675 - 18684
Main Authors Dai, Zhongyu, Wang, Junhua, Jin, Lei, Jing, Hang, Fang, Zhijian, Hou, Haoli
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Coils
full-freedom
hemispherical coils
Magnetic cores
Magnetic fields
Receivers
spherical coil
Spheroid joints
Spheroids
Transmission efficiency
Transmitters
Wireless power transfer
wireless power transfer (WPT)
Wireless power transmission
Wires
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Summary:A full-freedom wireless power transfer for spheroid joints is proposed to solve the problem of power transmission between the caput-articularis and the acetabulum in a spheroid joint. According to the characteristics of the spheroid joint, a hemispherical coil and a spherical coil are designed having no effect on the performance of the joint. Hemispherical and spherical magnetic cores are used to optimize the magnetic field distribution of the transmitter and receiver coils to reduce the electromagnetic influence on the external environment of the acetabulum and the internal environment of the caput-articularis during the power transmission process. Practical results obtained from a hardware prototype are included. They confirm that the maximum transmission efficiency of the designed system is 91%, and the transmission efficiency is always higher than 80% when the caput-articularis rotates freely.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2018.2890555