Improved Wireless Power Transfer to Implants Deep Inside the Body

2020 ◽  
Author(s):  
Hidetoshi Ohta
Keyword(s):  
Wireless Power Transfer ◽  
The Body ◽  
Power Transfer ◽  
Wireless Power

scholarly journals Wireless Charger for Artificial Pacemaker

2021 ◽  
Author(s):  
Abinaya.B ◽  
Abirami.A.P ◽  
Divya.J ◽  
Rajalakshmi.R
Keyword(s):  
Output Voltage ◽  
Wireless Power Transfer ◽  
The Body ◽  
Rechargeable Battery ◽  
Medical Procedure ◽  
Power Transfer ◽  
Wireless Power ◽  
Inductive Power Transfer ◽  
Voltage Controller ◽  
Power Transfer Efficiency

The vast majority of the modernized implantable devices and Bio-sensors are set inside a patient’s body. To overcome this constraint, in this paper we have designed a rechargeable battery with wireless power transfer technique. The transdermal power transfer for the Pacemaker which is placed inside the heart should be possible by the concept of mutual inductance. The receiver loop ought to be situated inside the body and the transmitter curl ought to be situated outside of the body. The voltage controller will give or manage the necessary yield (output) voltage. The experiments were conducted on wireless charging through pork tissues reveal that from a 3.919-mw power source, 3.072-mw power can be received at 300kHz, reaching a high wireless power transfer efficiency of 78.4%, showing that the charging is very fast. We have also connected a Bluetooth Module to the Atmega328 microcontroller. This Bluetooth technology is used in the Android mobile application to notice the charging levels of the pacemaker. This Inductive power transfer technique takes out the danger of contamination which is brought about by the medical procedure.

scholarly journals A Modified Wireless Power Transfer System for Medical Implants

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1890 ◽  
Author(s):  
Yosra Ben Fadhel ◽  
Sana Ktata ◽  
Khaled Sedraoui ◽  
Salem Rahmani ◽  
Kamal Al-Haddad
Keyword(s):  
Form Factor ◽  
Wireless Power Transfer ◽  
The Body ◽  
Transfer Efficiency ◽  
Power Transfer ◽  
Medical Implants ◽  
Wireless Power ◽  
Small Form ◽  
Power Transfer Efficiency ◽  
Small Form Factor

Wireless Power Transfer (WPT) is a promising technique, yet still an experimental solution, to replace batteries in existing implants and overcome the related health complications. However, not all techniques are adequate to meet the safety requirements of medical implants for patients. Ensuring a compromise between a small form factor and a high Power Transfer Efficiency (PTE) for transcutaneous applications still remains a challenge. In this work, we have used a resonant inductive coupling for WPT and a coil geometry optimization approach to address constraints related to maintaining a small form factor and the efficiency of power transfer. Thus, we propose a WPT system for medical implants operating at 13.56 MHz using high-efficiency Complementary Metal Oxide-Semiconductor (CMOS) components and an optimized Printed Circuit Coil (PCC). It is divided into two main circuits, a transmitter circuit located outside the human body and a receiver circuit implanted inside the body. The transmitter circuit was designed with an oscillator, driver and a Class-E power amplifier. Experimental results acquired in the air medium show that the proposed system reaches a power transfer efficiency of 75.1% for 0.5 cm and reaches 5 cm as a maximum transfer distance for 10.67% of the efficiency, all of which holds promise for implementing WPT for medical implants that don’t require further medical intervention, and without taking up a lot of space.

scholarly journals Optimization of the Coupling Coefficient of the Inductive Link for Wireless Power Transfer to Biomedical Implants

2022 ◽  
Vol 2022 ◽  
pp. 1-12
Author(s):  
Jiarui Bao ◽  
Shuyan Hu ◽  
Zibin Xie ◽  
Guangxi Hu ◽  
Ye Lu ◽  
...  
Keyword(s):  
Coupling Coefficient ◽  
Wireless Power Transfer ◽  
The Body ◽  
Power Transfer ◽  
Wireless Power ◽  
Implantable Medical Devices ◽  
Inductive Link ◽  
High Frequency Structure Simulator ◽  
Power Transfer Efficiency ◽  
Air Muscle

This work focuses on the optimization of coupling coefficient (k) of the inductive link for the wireless power transfer (WPT) system to be used in implantable medical devices (IMDs) of centimeter size. The analytic expression of k is presented. Simulations are conducted by using the high-frequency structure simulator (HFSS). Analytic results are verified with simulations. The receiving (Rx) coil is implanted in the body and set as a circular coil with a radius of 5 millimeters for reducing the risk of tissue inflammation. The inductive link under misalignment scenarios is optimized to improve k. When the distance between the transmitting (Tx) and Rx coils is fixed at 20 mm, it is found that, to maximize k, the Tx coil in a planar spiral configuration with an average radius of 20 mm is preferred, and the Rx coil in a solenoid configuration with a wire pitch of 0.7 mm is recommended. Based on these optimization results, an inductive link WPT system is proposed; the coupling coefficient k, the power transfer efficiency (PTE), and the maximum power delivered to the load (MPDL) of the system are obtained with both simulation and experiment. Different media of air, muscle, and bone separating the Tx and Rx coils are tested. For the muscle (bone) medium, PTE is 44.14% (43.07%) and MPDL is 145.38 mW (128.13 mW), respectively.

scholarly journals Wireless Power Transfer Through Inductive Coupling For Aimds

2019 ◽  
Vol 8 (11) ◽  
pp. 138-141
Keyword(s):  
Human Body ◽  
Wireless Power Transfer ◽  
The Body ◽  
Battery Life ◽  
Receiver Coil ◽  
Implantable Cardioverter Defibrillators ◽  
Power Transfer ◽  
Wireless Power ◽  
Cardiac Pacemakers ◽  
Resonance Coupling

For the patients with some cardiovascular diseases, implantable devices like implantable cardiac pacemakers and implantable cardioverter defibrillators play a very important role. The life of implantable device is limited by the life of battery and the size of implanted device is dependent on size of battery. More life of battery demands larger battery size. Since these devices are implanted inside the human body, they must be small in size as well as of long battery life. Wireless re-charging of such devices can only be the solution to reduce the size and increase life of AIMDs. Wireless recharging by magnetic resonance coupling in less time is expected and hence this topic is considered for more research to have uninterrupted power supply from battery. Selection of operating frequency for transfer of power wirelessly is of great concern as it requires attention towards certain guidelines as basic restrictions provided by International Commission on non-ionizing Radiation Protection (ICNIRP). With lower frequencies used for power transfer, the efficiency would be less whereas with higher frequencies efficiency would be higher but with the use of higher frequencies for power transfer certain biological issues needs attention like tissue heating. In the technique of wireless power transfer, the transmitting coil is assumed to be outside the body and receiver coil is considered to be inside the human body above the pacemaker shell. The efficiency of power transfer is affected by frequency for power transfer and distance between the two coils.

scholarly journals Development of Attendance and Temperature Monitoring System using IoT with Wireless Power Transfer Application

2022 ◽  
Vol 30 (1) ◽  
pp. 709-723
Author(s):  
Noramalina Abdullah ◽  
Sarah Madihah Mohd Shazali
Keyword(s):  
Body Temperature ◽  
Wireless Power Transfer ◽  
The Body ◽  
Qr Code ◽  
Power Transfer ◽  
Android Application ◽  
Wireless Power ◽  
Bacterial Diseases ◽  
Simulation Results ◽  
Student Information

Enclosed areas pose a greater risk of transmitting infectious and bacterial diseases. The proposed system helps prevent disease by tracking students’ daily body temperature before entering the school premises. Each student will be provided with a unique QR code containing the student information, such as their name and class. The QR code needs to be scanned first by the camera-equipped smartphone before reading the body temperature. The thermometer will record the student’s body temperature and send the information to the smartphone via Bluetooth. The student’s profile will be updated with the recorded daily temperature. An Android application will be developed to scan the QR code and display the students’ profiles and information. In order to design a battery-less system, the system will be integrated with a wireless power transfer circuit. Based on the simulation results, the wireless power transfer circuit can be used as a wireless charger for the smartphone used in the system or for charging the thermometer’ of the thermometer.

scholarly journals Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3487 ◽  
Author(s):  
Sadeque Reza Khan ◽  
Sumanth Kumar Pavuluri ◽  
Gerard Cummins ◽  
Marc P. Y. Desmulliez
Keyword(s):  
Medical Devices ◽  
Wireless Power Transfer ◽  
The Body ◽  
Transfer Efficiency ◽  
Power Transfer ◽  
Wireless Power ◽  
Implantable Medical Devices ◽  
Wide Range ◽  
Power Transfer Efficiency ◽  
Tissue Safety

Wireless power transfer (WPT) systems have become increasingly suitable solutions for the electrical powering of advanced multifunctional micro-electronic devices such as those found in current biomedical implants. The design and implementation of high power transfer efficiency WPT systems are, however, challenging. The size of the WPT system, the separation distance between the outside environment and location of the implanted medical device inside the body, the operating frequency and tissue safety due to power dissipation are key parameters to consider in the design of WPT systems. This article provides a systematic review of the wide range of WPT systems that have been investigated over the last two decades to improve overall system performance. The various strategies implemented to transfer wireless power in implantable medical devices (IMDs) were reviewed, which includes capacitive coupling, inductive coupling, magnetic resonance coupling and, more recently, acoustic and optical powering methods. The strengths and limitations of all these techniques are benchmarked against each other and particular emphasis is placed on comparing the implanted receiver size, the WPT distance, power transfer efficiency and tissue safety presented by the resulting systems. Necessary improvements and trends of each WPT techniques are also indicated per specific IMD.

Design and development of wireless power transfer system for implantable cardioverter defibrillator

2020 ◽  
pp. 1-12
Author(s):  
K. Aditya ◽  
Phaneendra Babu Bobba ◽  
Y. Satyavani
Keyword(s):  
Implantable Cardioverter Defibrillator ◽  
Magnetic Coupling ◽  
Wireless Power Transfer ◽  
The Body ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Cardioverter Defibrillator ◽  
Wireless Power Transfer System ◽  
Effective Transfer

Wireless power transfer system is playing an important role in biomedical applications by transferring power wirelessly to the implants present in the body. In this paper, magnetic coupling resonance wireless power transfer system is used to recharge battery of implantable cardioverter defibrillator. The proposed system operates at 300 KHz frequency. The LCC-C compensation topology is used to tune the coils for operating the system at stable resonant frequency and to obtain higher efficiency. In this paper, we have investigated the performance of different coil structures in multiple layer configurations and we offer recommendations on the best suitable configuration for effective transfer of power.

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