Capacitive power transfer in biomedical implantable device: a review

Mustapa, Muhammad Zaki; Saat, Shakir; Yusmarnita, Y.; Shaari, Muslimah Meor

doi:10.11591/ijpeds.v10.i2.pp935-942

Cited by 12 publications

(10 citation statements)

References 24 publications

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“…Compensation circuits increase this sensitivity even more. For this reason, these types of converters are commonly used in low power applications which are 'static' [85,95].…”

Section: Power Amplifier Based Convertermentioning

confidence: 99%

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

2021

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Wireless power transfer allows the transfer of energy from a transmitter to a receiver without electrical connections. Compared to galvanic charging, it displays several advantages, including improved user experience, higher durability and better mobility. As a result, both consumer and industrial markets for wireless charging are growing rapidly. The main market share of wireless power is based on the principle of inductive power transfer, a technology based on coupled coils that transfer energy via varying magnetic fields. However, inductive charging has some disadvantages, such as high cost, heat dissipation, and bulky inductors. A promising alternative is capacitive wireless power transfer that utilizes a varying electric field as medium to transfer energy. Its wireless link consists of conductive plates. The purpose of this paper is to review the state of the art, link the theoretical concepts to practical cases and to indicate where further research is required to take next steps towards a marketable product. First, we describe the capacitive link via a coupling model. Next, we highlight the recent progress in plate topologies. Additionally, the most common compensation networks, necessary for achieving efficient power transfer, are reviewed. Finally, we discuss power electronic converter types to generate the electric field.

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“…Compensation circuits increase this sensitivity even more. For this reason, these types of converters are commonly used in low power applications which are 'static' [85,95].…”

Section: Power Amplifier Based Convertermentioning

confidence: 99%

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

2021

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“…The conventional coupler structures are also reviewed as two-plate, four-plate, six-plate, and electric field repeater. Mustapa et al [23] presented a literature review on CPT technology in a biomedical implantable device. The authors point out that CPT is more robust against exposure to EMI.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from µW to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from µm range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.INDEX TERMS Capacitive power transfer, capacitive coupling, wireless power transfer.MEHMET ZAHID EREL was born in Sakarya, Turkey. He received the B.S. degree in electrical engineering from the Yildiz Technical University, Istanbul, Turkey, in 2013, and the M.S. degree in electronics and communication engineering from the Ankara Yildirim Beyazit University, Ankara, Turkey, in 2016. He is currently pursuing the Ph.D. degree with the department of electrical and electronics engineering,

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“…Wireless power transfer (WPT) has attracted widespread research and industry interest in recent years [1], [2]. There are two major technologies in WPT area: inductive power transfer (IPT) and capacitive power transfer (CPT).…”

Section: Introductionmentioning

confidence: 99%

single-phase bidirectional AC-AC converter with H-bridge energy buffer for wireless power transfer applications

Hasan

Saha

2022

IJPEDS

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This paper introduces a single-phase bidirectional AC-AC Matrix type converter for wireless power transfer (WPT) applications. The proposed converter converts mains 50 Hz alternating current (AC) directly to high frequency 85 kHz AC without an intermediate direct current (DC) conversion stage. A minimum cost realization of only two bidirectional AC switches comprised each of two semiconductor device and one gate drive signal is employed. The converter operation modes are quantum energy injection and circulating self-oscillation. Elimination of the DC link introduces a sag in the power transfer during the zero crossing of input AC mains, which is well documented in literature. A novel H-bridge buffer structure is introduced which eliminates the power sag by storing energy during mains peak and delivering energy during the zero-crossing period. The converter operates with inherent zero current switching, thus achieving a low switching loss and electro-magnetic interference. The control feature ensures that the converter can be used for both static and dynamic wireless charging applications. The bidirectional power transfer capability ensures that the system can operate in both grid to vehicle (G2V) and vehicle to grid (V2G) power transfer modes. The proposed converter design is analyzed analytically and verified through thorough simulation study.

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Capacitive power transfer in biomedical implantable device: a review

Cited by 12 publications

References 24 publications

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

single-phase bidirectional AC-AC converter with H-bridge energy buffer for wireless power transfer applications

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