scholarly journals Design of 2MHz OOK transmitter/receiver for inductive power and data transmission for biomedical implant

2019 ◽  
Vol 9 (4) ◽  
pp. 2779 ◽  
Author(s):  
Abdelali El Boutahiri ◽  
Mounir Ouremchi ◽  
Ahmed Rahali ◽  
Mustapha El Alaoui ◽  
Fouad Farah ◽  
...  
Keyword(s):  
Data Transmission ◽  
Supply Voltage ◽  
Receiver Coil ◽  
Cmos Process ◽  
Power Transfer ◽  
Biomedical Implant ◽  
Transmitter Coil ◽  
Implant System ◽  
Inductive Power ◽  
Class E

<p>In this work a 2 MHz on-off keying (OOK) transmitter/receiver for inductive power and data transmission for biomedical implant system is presented. Inductive link, driven by a Class E power amplifier (PA) is the most PA used to transfer data and power to the internal part of biomedical implant system. Proposed transmitter consists of a digital control oscillator (DCO) and a class E PA which uses OOK modulation to transfer both data and power to a biomedical implant. In proposing OOK transmitter when the transmitter sends binary value “0” the DCO and PA are turned off. With this architecture and 2 MHz carrier wave we have implemented a wireless data and power transfer link which can transmit data with data rate 1Mbps and bit error rate (BER) of 10-5. The efficiency of power transfer is 42% with a 12.7 uH transmitter coil and a 2.4 uH receiver coil and the power delivered to the load is about 104.7 mW. Proposed transmitter is designed for output power 4.1V. OOK receiver consists of an OOK demodulator, powered by rectified and regulated 5V p-p RF signal across the receiver coil. The supply voltage of proposed voltage regulator is 5 V with 9mV/V line regulation of. All circuits proposed in this paper were designed and simulated using Cadence in 0.18 um CMOS process.</p>

Computational Design for Digitally Fabricated 3D Inductive Power Transfer Coils

2022 ◽  
pp. 1-28
Author(s):  
Jun Xu ◽  
Eugeni L. Doubrovski ◽  
Jo Geraedts ◽  
Yu Song
Keyword(s):  
Design Method ◽  
Computational Design ◽  
Future Research ◽  
Receiver Coil ◽  
Power Transfer ◽  
Coil Design ◽  
Optimal Position ◽  
Inductive Power Transfer ◽  
Transmitter Coil ◽  
Inductive Power

Abstract The geometric shapes and the relative position of coils influence the performance of a three-dimensional (3D) inductive power transfer system. In this paper, we propose a coil design method for specifying the positions and the shapes of a pair of coils to transmit the desired power in 3D. Given region of interests (ROIs) for designing the transmitter and the receiver coils on two surfaces, the transmitter coil is generated around the center of its ROI first. The center of the receiver coil is estimated as a random seed position in the corresponding 3D surface. At this position, we use the heatmap method with electromagnetic constraints to iteratively extend the coil until the desired power can be transferred via the set of coils. In each step, the shape of the extension, i.e. a new turn of the receiver coil, is found as a spiral curve based on the convex hulls of adjacent turns in the 2D projection plane along their normal direction. Then, the optimal position of the receiver coil is found by maximizing the efficiency of the system. In the next step, the position and the shape of the transmitter coil are optimized based on the fixed receiver coil using the same method. This zig-zag optimization process iterates until an optimum is reached. Simulations and experiments with digitally fabricated prototypes were conducted and the effectiveness of the proposed 3D coil design method was verified. Possible future research directions are highlighted well.

scholarly journals Effects of Foreign Metal Object on Soft-Switching Conditions of Class-E Inverter in WPT

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1926 ◽  
Author(s):  
Wenxun Xiao ◽  
Ruigeng Shen ◽  
Bo Zhang ◽  
Dongyuan Qiu ◽  
Yanfeng Chen ◽  
...  
Keyword(s):  
Soft Switching ◽  
Receiver Coil ◽  
Power Transfer ◽  
Wireless Power ◽  
Metal Object ◽  
Transfer Capability ◽  
Transmitter Coil ◽  
Metal Materials ◽  
Simulation Results ◽  
Class E

A foreign metal object will deteriorate the performance of wireless power transfer (WPT) systems and cause insecurity issues. Therefore, the influence principles and rules of foreign metal objects on soft-switching conditions of Class-E inverters and the performance of WPT systems are developed in this paper. The effects of different metal materials on coil parameters at different frequencies and positions are analyzed first, then the effects of foreign metal objects on soft-switching conditions of Class-E inverters and the power transfer capability of WPT systems are investigated. Principle analyses and simulation results demonstrate that there are significantly different effects on the soft-switching conditions and power transfer when a foreign metal object is placed near the transmitter coil or the receiver coil. In addition, the monotonicity of the variation in power transfer also depends on the position of the foreign metal object. Finally, a WPT experimental prototype with a Class-E inverter is implemented to verify the influence principles and rules of foreign metal objects. The experimental results are highly consistent with the principle analyses and simulation results.

An Implantable Microbolus Pump With Contactless Rechargeable Battery Power Source Triggered by Remote Activation

2007 ◽  
Author(s):  
Tina K. Givrad ◽  
Daniel P. Holschneider ◽  
William H. Moore ◽  
Jun Yang ◽  
Jean-Michel I. Maarek
Keyword(s):  
Infusion Pump ◽  
Power Source ◽  
Infrared Light ◽  
Rechargeable Battery ◽  
Power Transfer ◽  
Inductive Power Transfer ◽  
Transmitter Coil ◽  
Design And Testing ◽  
Mini Pump ◽  
Inductive Power

We describe the design and testing of an implantable miniature infusion pump that uses a rechargeable battery as a power source. This design includes a receiver printed coil that allows inductive power transfer from a transmitter coil wound around a 20 cm diameter charging unit and a frequency-gated optical sensor that allows activation of the pump at a distance using pulses of infrared light. This mini pump can be charged in the home cage by inductive power transfer, and then operates independently from its power link in freely moving animals.

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