Low EMF Design of Cochlear Implant Wireless Power Transfer System using A Shielding Coil

Hong, Seokwoo; Jeong, Seungtaek; Lee, Seongsoo; Sim, Boogyo; Kim, Hongseok; Kim, Joungho

doi:10.1109/emcsi38923.2020.9191460

Cited by 13 publications

(10 citation statements)

References 7 publications

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“…It was chosen as 0.35 for the case with a high coupling factor and 0.05 for the case with a low coupling factor. Using the efficiency (6) and equivalent impedance (7) equations given in Section 2, the change of equivalent impedance and efficiency according to frequency is investigated. In the SS topology, the graph of the change of equivalent impedance and efficiency according to frequency for the coupling factor value of 0.35 is given in Figure 3.…”

Section: Matlab/simulinkmentioning

confidence: 99%

“…One of the application areas of inductively coupled WPT is recharging implanted devices in biomedicine (Agarwal, et al, 2017). The WPT is used in many application areas such as pacemaker (Campi, et al, 2016), cochlear implant (Hong, et al, 2020), and peripheral nerve implant (Jegadeesan, et al, 2015) charging. Dimensions, powers and operating frequencies vary according to application areas (Agarwal, et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Wireless Power Transfer System Design for Charging of Intra-Body Implant Devices

Büyüktuna,

Dilek,

Yorgancılar

et al. 2024

UUJFE

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Wireless power transfer (WPT) presents numerous possibilities for recharging electronic devices in challenging environments. Charging of biomedical devices within the body is among the available opportunities. Inductively coupled WPT is a dependable and effective solution for powering these devices. Energy is transferred from the transmitter to the receiver in the inductively coupled WPT system through the use of coils and magnetic coupling. A WPT system was designed for this study, with dimensions of 4 cm by 4 cm, power output of 1 mW, and a frequency of 13.56 MHz. Series-Series (SS) topology was selected for its ease of handling and simple architecture. A square coil was selected as the receiver and transmitter coil structure due to its higher coupling factor than circular coils. ANSYS® Maxwell 3D was used to design the coils and perform magnetic analysis. In the ANSYS® HFSS program, the WPT system was placed inside the male human model and the electromagnetic exposure of the WPT on humans was examined. The magnetic scattering of the WPT system was within the safe values specified by IEEE and ICNIRP standards.

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Section: Matlab/simulinkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Wireless Power Transfer System Design for Charging of Intra-Body Implant Devices

Büyüktuna,

Dilek,

Yorgancılar

et al. 2024

UUJFE

View full text Add to dashboard Cite

show abstract

Section: Wireless Poweringmentioning

confidence: 99%

“…proposed an IPT‐based wireless power supply technique for the cochlear implant with a shielding coil in TX (Figure 3c, left). [ 106 ] Normally, the electromagnetic field leaks during WPT and causes electro‐magnetic interference issues in the human body. Thus, an additional shielding coil was developed for effective suppression of the electromagnetic field radiation and reduction of the leakage.…”

Section: Wireless Poweringmentioning

confidence: 99%

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

Yoo

Lee

Joo

et al. 2021

Adv Healthcare Materials

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Implantable bioelectronic devices are becoming useful and prospective solutions for various diseases owing to their ability to monitor or manipulate body functions. However, conventional implantable devices (e.g., pacemaker and neurostimulator) are still bulky and rigid, which is mostly due to the energy storage component. In addition to mechanical mismatch between the bulky and rigid implantable device and the soft human tissue, another significant drawback is that the entire device should be surgically replaced once the initially stored energy is exhausted. Besides, retrieving physiological information across a closed epidermis is a tricky procedure. However, wireless interfaces for power and data transfer utilizing radio frequency (RF) microwave offer a promising solution for resolving such issues. While the RF interfacing devices for power and data transfer are extensively investigated and developed using conventional electronics, their application to implantable bioelectronics is still a challenge owing to the constraints and requirements of in vivo environments, such as mechanical softness, small module size, tissue attenuation, and biocompatibility. This work elucidates the recent advances in RF‐based power transfer and telemetry for implantable bioelectronics to tackle such challenges.

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“…As a novel technology for the power charging system, the WPT shows great potential with its simplicity and convenience progressively. Recently, WPT technology is applied to lots of wireless charging systems for portable devices such as mobile phones [3][4][5], electric vehicles [6][7][8], and implanted microelectronic devices [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Plane-Omnidirectional Wireless Power Transfer System Based on Vector-Controlled Flux Linkage

et al. 2021

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The major challenge for wireless power transfer (WPT) is to extend transfer distance and to broaden transfer direction, while a stable power can be transferred with high and constant efficiency. The multi-coil WPT system can transfer power on the plane or space omnidirectionally, but its output power and efficiency are usually difficult to keep stability. For a nonlinear wireless power transfer system based on parity-time (PT) symmetry, when the coupling condition of system can be satisfied, it can attain a stable power with high and constant efficiency, but it still has a dead-spot problem in the transfer direction. Therefore, this article proposes a design of a plane-omnidirectional WPT system, of which the coupling condition can be maintained across the plane. The transmitter coils are a pair of orthogonal coils which are named transmitter coils 1 and 2. Meanwhile, in the transmitting circuit, the positive direction of transmitter coil 1, which determines the positive direction of current and flux, is controlled by a reversed switch group (RSG) with a logic-check loop (LCL). Moreover, the theoretical analysis is shown that the proposed system can reverse the flux direction of transmitter coil 1 while the angle of transfer direction is overly large, then the coupling condition of the system after reversal can still be satisfied. Finally, the experimental results show that when the receiver coil moves around the transmitter coils on the whole plane, the stable output power of 14 W is maintained with an approximately constant transfer efficiency of 87%.INDEX TERMS Plane-omnidirectional, wireless power transfer (WPT), vector control, reversed switch group (RSG), constant transfer efficiency.

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Low EMF Design of Cochlear Implant Wireless Power Transfer System using A Shielding Coil

Cited by 13 publications

References 7 publications

A Wireless Power Transfer System Design for Charging of Intra-Body Implant Devices

A Wireless Power Transfer System Design for Charging of Intra-Body Implant Devices

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

Plane-Omnidirectional Wireless Power Transfer System Based on Vector-Controlled Flux Linkage

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