Analysis and Design of a 3-Coil Wireless Power Transmission System for Biomedical Applications

Machnoor, Manjunath; Rodriguez, Erik Saturnino Gamez; Kosta, Pragya; Stang, John; Lazzi, Gianluca

doi:10.1109/tap.2018.2883687

Cited by 49 publications

(17 citation statements)

References 40 publications

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“…This paper assumes M TR = 0. Solving the KVL equation of the equivalent circuit, the current expression of each circuit can be obtained, and all the current solutions given in (4) are valid only at the resonant frequency:…”

Section: Receiver Coil Ac Power Supplymentioning

confidence: 99%

“…This technology is used not only in the electrical equipment to obtain electrical energy from a fixed power grid in a non-contact way, but also to improve the safety of the electrical equipment. In July 2007, an academic team headed by Professor Soljacic from MIT proposed a power transfer scheme using magnetic coupling resonance [1,2], which greatly promoted the development of mid-range wireless charging equipment, especially in biomedicine [3,4] and EV (electric vehicle) charging [5]. However, with the increasing of the transfer distance, the transfer performance of the traditional two coil structure drastically decreases [6], which often brings difficulties in practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Position of the Intermediate Coils in a Magnetic Coupled Resonant Wireless Power Transfer System

et al. 2019

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Coaxial coil topology is used as the transfer medium in traditional MCR-WPT (Magnetic Coupled Resonant Wireless Power Transfer) systems to improve the transfer characteristics. The intermediate coils are added to extend the transmission distance, whose positions are critical. This paper focuses on the optimal intermediate coil positions for an MCR-WPT system with four coaxial planar circular spiral coils. By modeling the MCR-WPT system, the mathematical expression of the self-inductance and the mutual inductance are used to calculate the load power of the MCR-WPT system, which is composed of four planar circular spiral coaxial coils, and using MATLAB. The optimal distance ratio between the adjacent coils for maximizing the power of load is proposed. Furthermore, the experiments are implemented from the network analyzer and the experimental platform. In the platform, the load power is measured at the different intermediate coil positions, and the optimal position at which the load power is maximized is found. Both experimental results obtained by the network analyzer and the experimental platform have validated the theoretical and simulation results and provided the correctness of the suggested ratios.

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Section: Receiver Coil Ac Power Supplymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Position of the Intermediate Coils in a Magnetic Coupled Resonant Wireless Power Transfer System

et al. 2019

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“…is approach restricts the patient's mobility and exposes the whole body to the radiated power. e second technique is the inductive coupling between two coils [10][11][12][13][14][15][16][17][18][19]. ese coils should be kept aligned well; otherwise, the strong electromagnetic coupling will be lost.…”

Section: Introductionmentioning

confidence: 99%

An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna

Kod

Zhou

Huang

et al. 2021

Wireless Power Transfer

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An approach to improve wireless power transfer (WPT) to implantable medical devices using loop antennas is presented. The antenna exhibits strong magnetic field and dense flux line distribution along two orthogonal axes by insetting the port inside the antenna area. This design shows excellent performance against misalignment in the y-direction and higher WPT as compared with a traditional square loop antenna. Two antennas were optimized based on this approach, one wearable and the other implantable. Both antennas work at both the ISM (Industrial, Scientific, and Medical) band of 433 MHz for WPT and the MedRadio (Medical Device Radiocommunications Service) band of 401–406 MHz for communications. To test the WPT for implantable medical devices, a miniaturized rectifier with a size of 10 mm × 5 mm was designed to integrate with the antenna to form an implantable rectenna. The power delivered to a load of 4.7 kΩ can be up to 1150 μW when 230 mW power is transmitted which is still under the safety limit. This design can be used to directly power a pacemaker, a nerve stimulation device, or a glucose measurement system which requires 70 μW, 100 μW, and 48 μW DC power, respectively.

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“…The pioneering research at MIT [8] provides a physical demonstration from a single source to multiple small receivers. Multiple investigators have gone further and inserted between the transmitter and receiver three coils [9,10], four coils [11,12], and N coils [13] to increase the distance and power transfer efficiency. These configurations increased the complexity of the nodes positions and arrangements between the coils.…”

Section: Introductionmentioning

confidence: 99%

Inductive Multi-Frequency Diversity Using Split Resonant Frequency

Nguyen¹,

Agbinya²

2021

PIER M

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Although wireless power transfer systems suffer from splitting frequency conditions under strong coupling, this could create an opportunity for initiating other frequencies for power and data transfer. This paper introduces a model of an inductive transmitter containing a transmitter and many internal resonators to diversify the magnetic link to the receiver. Using the proposed architecture and solution, the efficiency and received power can be increased, and it also supports multiple frequency diversity.

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Analysis and Design of a 3-Coil Wireless Power Transmission System for Biomedical Applications

Cited by 49 publications

References 40 publications

Optimal Position of the Intermediate Coils in a Magnetic Coupled Resonant Wireless Power Transfer System

Optimal Position of the Intermediate Coils in a Magnetic Coupled Resonant Wireless Power Transfer System

An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna

Inductive Multi-Frequency Diversity Using Split Resonant Frequency

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