Circuit Parameters of a Receiver Coil Using a Wiegand Sensor for Wireless Power Transmission

Sensors

Katsuki Takahashi¹  Tsutomu Yamada¹  Yasushi Takemura¹ 

[1] Electrical and Computer Engineering, Yokohama National University, Yokohama 240-8501, Japan;

关键词: wiegand sensor;    magnetization reversal;    large Barkhausen jump;    FeCoV wire;   

DOI  :  10.3390/s19122710

来源: DOAJ

【 摘 要 】

We previously demonstrated an efficient method of wireless power transmission using a Wiegand sensor for the application in implantable medical devices. The Wiegand sensor has an advantage in inducing sharp pulse voltage independent of the drive frequency. A down-sized receiver coil for wireless power transmission within blood vessels has been prepared, which enables medical treatment on any part of a human body. In order to develop practical applications of the Wiegand sensor as implantable medical devices, the circuit design is important. The circuit parameters in the circuit model of the Wiegand sensor must be clearly identified. However, a fast reversal of magnetization of the magnetic wire used in the Wiegand sensor, known as a large Barkhausen jump, and the induced nonlinear pulse signal make the inductance of the receiver coil time-dependent and inconsistent as conventionally considered in circuit analysis. In this study, the voltage and current responses of a wire-core coil are analyzed, and the time-dependent inductance is determined. The results showed that the inductance depends on the magnetization state of the wire, which can be negative during the fast reversal of magnetization.

【 授权许可】

Unknown