Wireless Charging System Considering Eddy Current in Cardiac Pacemaker Shell: Theoretical Modeling, Experiments, and Safety Simulations

Chen, Xiao; Wei, Kangzheng; Cheng, Dingning; Liu, Yufeng

doi:10.1109/tie.2016.2645142

Cited by 69 publications

(46 citation statements)

References 29 publications

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“…The obtained results highlight the capability of the proposed solution to transfer a relatively large amount of power to the AIMD also for the test case #2 (titanium housing without any ferrite cover) obtaining a maximum output power Pout = 310 mW. Note that, in the case of a deep implantable device such as a leadless pacemaker, the required power is generally smaller than 10 mW [3,28], that is much lower than Pout. The obtained results highlight the capability of the proposed solution to transfer a relatively large amount of power to the AIMD also for the test case #2 (titanium housing without any ferrite cover) obtaining a maximum output power P out = 310 mW.…”

Section: Wpt Electrical Performancesmentioning

confidence: 62%

“…The wireless power transfer (WPT) technology can be applied to power or charge an active implantable medical device (AIMD). With this technology, the power can be transferred from the on-body transmitter to the in-body AIMD equipped with a receiver [1][2][3][4][5][6][7][8][9][10]. There are mainly two different approaches for this kind of application.…”

Section: Introductionmentioning

confidence: 99%

“…The first one is based on the inductive coupling between two coils: the primary coil is worn by the patient, while the secondary coil is installed in the AIMD. The performance of the inductive power transfer is significantly improved using magnetic resonant coupling (MRC) between the primary and secondary coils at intermediate frequencies (IFs), i.e., 10 kHz-10 MHz [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…It can also be applied for high power transfer, but when powering deep implants it has a big limitation due to the exponential decay of the magnetic field produced by a planar coil. Therefore, when using a wearable small size coil, the inductive WPT technology cannot efficiently power deep implants, while it is very suitable for subcutaneous AIMDs, such as pacemakers [1][2][3][4][5][6]. On the other hand, the MWP technology [9,10] is 2 of 18 very powerful for deep microimplants, but it is not very good for powering AIMDs in motion, with a variable position or with a metal housing.…”

Section: Introductionmentioning

confidence: 99%

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Near Field Wireless Powering of Deep Medical Implants

et al. 2019

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This study deals with the inductive-based wireless power transfer (WPT) technology applied to power a deep implant with no fixed position. The usage of a large primary coil is here proposed in order to obtain a nearly uniform magnetic field inside the human body at intermediate frequencies (IFs). A simple configuration of the primary coil, derived by the Helmholtz theory, is proposed. Then, a detailed analysis is carried out to assess the compliance with electromagnetic field (EMF) safety standards. General guidelines on the design of primary and secondary coils are provided for powering or charging a deep implant of cylindrical shape with or without metal housing. Finally, three different WPT coil demonstrators have been fabricated and tested. The obtained results have demonstrated the validity of the proposed technology.

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Section: Wpt Electrical Performancesmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Near Field Wireless Powering of Deep Medical Implants

et al. 2019

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“…The wireless power transfer (WPT) technique by magnetic coupling coils has been applied in many fields, such as portable electronic devices [1][2][3][4], electric vehicles [5][6][7], and implanted medical devices [8][9][10][11]. For mid-range air gap between transmitting and receiving coil (the distance between two coils is usually less than eight times the diameter of the coil), the power transfer efficiency is vitally important and must be given priority in applications of high-power or continuous-operation electric devices such as power supply for household appliance, vehicle charging and microwave power transmission.…”

Section: Introductionmentioning

confidence: 99%

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

et al. 2017

Self Cite

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Most research on wireless power transfer (WPT) has been focused on how to achieve a high-efficiency power transfer. Our study found that under the impedance matching for achieving maximum WPT efficiency, the power transferred to the load cannot reach the maximum when a WPT system is supplied by an AC voltage source with constant amplitude. However, the load power or the voltage across the load is essential for a low-power electric device such as the implanted medical device where the transfer efficiency is not the priority to be considered. The paper presents a method for achieving maximum power on the load by matching capacitance in a WPT system with given two-coupled-coils. Three sets of matching capacitances for extreme load power were deduced based on the circuit model considering the coil's resistance, and all these three matching make the WPT system operate at the resonant state. Two sets can make the system achieve the global maximum of load power. One set can make the system achieve the local maximum of load power and reach the power transfer efficiency next to 1. Experimental results verified the theoretical calculations. The results can contribute to the compensation design of a practical WPT system for transferring the maximum power to the load.

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High‐efficiency LC‐S compensated wireless power transfer charging converter for implantable pacemakers

Çetin

Demirci

2021

Circuit Theory & Apps

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This paper deals with wireless power transfer (WPT) based on magnetic coupling resonance in order to delivery power to a cardiac pacemaker from the outside of the body. The high-efficiency power delivery, implantation, and safety are key parameters for a WPT system, designed for active implantable medical devices. Therefore, this paper is focused on high-efficiency power transfer, implantation, and safety issues. For the wireless charging of the pacemaker, the LC-S compensation topology is presented and designed based on high-efficiency power delivery. The resonant components of the LC-S compensation topology were extracted in order to ensure that WPT converter operates at resonance frequency. The operation of the presented WPT charging converter is validated by a prototype operating at 300-kHz operation frequency. At 4.2 V output voltage and 0.45 A output current, the WPT efficiency of the prototype is measured as 82.39%. Finally, the safety evaluation of the proposed WPT converter is also discussed based on reference values presented in the literature.

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Wireless Charging System Considering Eddy Current in Cardiac Pacemaker Shell: Theoretical Modeling, Experiments, and Safety Simulations

Cited by 69 publications

References 29 publications

Near Field Wireless Powering of Deep Medical Implants

Near Field Wireless Powering of Deep Medical Implants

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

High‐efficiency LC‐S compensated wireless power transfer charging converter for implantable pacemakers

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