Wireless power transfer for implantable medical devices using piecewise resonance to achieve high peak-to-average power ratio

Zan, Xin; Avestruz, Al-Thaddeus

doi:10.1109/compel.2017.8013365

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…Current-mode topologies are advantageous for the realization of ternary codes due to their ease in achieving ZVS and their ability to hold current constant in between resonant half sine voltages, hence freezing the state. The currentmode class-D (CMCD) [49] is a resonant converter topology that can realize ternary codes. However, this traditional CMCD topology is restricted to ternary codes with alternate positive and negative half sine voltages.…”

Section: Transceivers For Cdma-wptmentioning

confidence: 99%

A Framework for Code Division Multiple Access Wireless Power Transfer

Sarin¹,

Avestruz

2021

IEEE Access

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The availability of energy is one of the major hindrances to unlocking the massive potential of electronic devices. Powering a highly connected network of devices requires multiple access and a wireless power transfer (WPT) solution that is scalable and capable of maintaining a constant power flow regardless of reconfiguration (mutability) and electromagnetic environment (power flow selectivity). In this paper, we present a framework for the implementation of code division multiple access wireless power transfer (CDMA-WPT) for enabling WPT among multiple transmitters and multiple receivers simultaneously. CDMA-WPT maintains power flow selectivity and is easily scalable. An inverter/rectifier topology is presented for the hardware implementation of CDMA-WPT. A design process for practical co-design of high-performance hardware and obtaining a code set is also presented. We demonstrate the hardware implementation of CDMA-WPT using two transmitters and two receivers maintaining a nearly constant 5 W operation with nearly 75 % dc-dc efficiency, and four transmitters and four receivers maintaining a constant 4 W operating with greater than 70 % dc-dc efficiency. . This paper is accompanied by a video hardware demonstration in real-time the difference between using orthogonal codes in CDMA versus conventional single-frequency WPT using 4 transmitter-receiver pairs; conventional single-frequency WPT shows up to a 100 % deviation from the intended transfer power as opposed to 8.1 % for orthogonal codes in CDMA.INDEX TERMS Wireless power transfer (WPT), code division multiple access (CDMA), current-mode class-D (CMCD), internet of things (IoT), power amplifier, high-efficiency, resonant converter.

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Section: Transceivers For Cdma-wptmentioning

confidence: 99%

A Framework for Code Division Multiple Access Wireless Power Transfer

Sarin¹,

Avestruz

2021

IEEE Access

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“…Figure 2 WPT with stable power [4] Xin Zan et al [6] used piecewise resonant wireless power transfer (PR-WPT) for achieving reliability, simplicity and efficiency in WPT. The system uses a 6.78MHz class D amplifier operating in current-mode for the generation of peak-to average power ratio (PAPR) waveform.…”

Section: Literature Reviewmentioning

confidence: 99%

“…This leads to low system efficiency due to smaller receiving coils and weak coupling between the receiving and transmission coil [5]. A regulatory metric termed Specific Absorption Rate (SAR) is to be considered during utilization of wireless powering technology and IMDs as it causes crucial safety concerns such as tissue heating [6]. The demand of consumption for IMDs is around 5% in industrialized countries and it is experienced by around 10% citizens in America [9].…”

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confidence: 99%

Enhanced Wireless Power Transfer System for Implantable Medical Devices

Smys¹,

Wang

2019

JEEA

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An implantable medical device to monitor the vital signs such as blood pressure, pulse rate, body temperature and respiration rate is developed and its performance is estimated. A rechargeable battery is also embedded with the device so as to support uninterrupted monitoring of the signs. The status of the battery can also be monitored externally. The information gathered by the device is transmitted to the PC or mobile with the help of RF transceiver and a portable Wi-Fi based module. The system is optimized to operate at a nominal input power, achieve quick response and provide accurate output.

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“…The quest for wireless power sources is increasing in situations where cable-based charging is not feasible or where battery depletion and replacement is an issue [5]. Previously, wireless powering systems focused on low power systems for integrated circuits [6]. and other internet of things (IOT) devices.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer: A Review of Existing Technologies

Nnamdi¹,

Asianuba²

2023

EJENG

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Wireless Power Transfer (WPT) can be described as the processing of transmitting electricity without the use of wires. It has been increasingly used in places where battery depletion and replacement are major issues. WPT Technology are being used in different sectors. They include wireless charging, Electric vehicles, consumer electronics, etc. The paper describes the various types of WPT technologies; Inductive Coupling, Magnetic Resonance and Radio Frequency (RF) technology. It also discusses the advantages and shortfalls of each type. An extensive survey of past works was discussed. Results from the research findings showed that distance and conversion efficiency were limiting factors in implementing wireless transfer technology.

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Wireless power transfer for implantable medical devices using piecewise resonance to achieve high peak-to-average power ratio

Cited by 19 publications

References 16 publications

A Framework for Code Division Multiple Access Wireless Power Transfer

A Framework for Code Division Multiple Access Wireless Power Transfer

Enhanced Wireless Power Transfer System for Implantable Medical Devices

Wireless Power Transfer: A Review of Existing Technologies

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