Rotary Capacitive Power Transfer with Class-E Inverter And Balun Circuit

Ahmad, Suziana; Muharam, Aam; Hattori, Reiji

doi:10.1109/wow47795.2020.9291269

Cited by 5 publications

(5 citation statements)

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“…To improve the power level and the transfer distance, studies are carried out using class E inverter structure [145][146][147][148][149]. Moreover, studies are conducted to enhance the power transfer capability and minimize the system size [150][151][152][153]. Considering class D inverter, both half-bridge and full-bridge structures are put forward [154][155][156][157].…”

Section: ) Invertersmentioning

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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Section: ) Invertersmentioning

confidence: 99%

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

et al. 2022

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“…Various attempts have been made to apply battery-free real-time wireless sensor sys-tems to a rotating shaft. These efforts can be largely divided into research on sensors [ 2 , 3 , 4 ] such as non-powered sensors, and research on power sources [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ] such as wireless power transfer (WPT) or energy harvesters. For sensor research, powerless and non-contact sensor technologies are being considered for rotating shaft applications.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the complex structure and large size of rotary transformers, they are difficult to apply to the propulsion shaft of ships. A capacitive-WPT [ 11 , 12 , 13 ] technology using rotating capacitors has been reported, but it was mainly proposed as a replacement for slip rings. Since large-area electrode plates are used, the technology is also difficult to apply to a propulsion shaft with a diameter of 200 mm or more.…”

Section: Introductionmentioning

confidence: 99%

Battery-Free and Real-Time Wireless Sensor System on Marine Propulsion Shaft Using a Wireless Power Transfer Module

Lee

Hoang

2023

Sensors

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In this paper, we present a wireless sensor system (WSS) that integrated an inductive wireless power transfer (I-WPT) module for battery-free real-time monitoring of the status of rotating shaft in ships. Firstly, an optimized I-WPT module for seamless power supply was implemented using multiple Tx and Rx coils, and its power capability of 1.75 W with an efficiency of 75% was achieved. Secondly, as a result of the high-power transfer performance of the implemented I-WPT module, an entire WSS that integrated four sensors was designed on the rotary shaft. Finally, the designed WSS was installed on a small-scale test bench system with a shaft diameter of 200 mm; it was demonstrated that the status of a propulsion shaft could be monitored in real time without a battery.

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“…Cost, losses and alignment behavior of distributed sensor networks can be improved [3]. In wireless charging applications [4,5], when transferring energy through a track [6][7][8], and in fixed [9] and rotating assemblies [10][11][12][13] CPT provides the implementation of a lightweight, cost-effective and alignment insensitive solution, when compared to IPT. Thus, CPT has found its way into JESTPE-2022-02-0181 various energy transfer systems, for example for drones [14,15], robots [16], EVs [17][18][19][20], railway, maritime, and aviation applications [21][22][23][24].…”

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confidence: 99%

“…While most previously published CPT circuits integrate the coupling capacitances into their own resonant network (e.g. [10,12,13,[15][16][17][18]20]), there are some downsides to the use of such a resonant link. A resonant circuit needs time to settle and may require precise tuning or an extensive number of inductive elements to achieve insensitive behavior.…”

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confidence: 99%

Improved Capacitive Power Transfer With Non-Resonant Power Transfer Link Using Radio Frequency Push-Pull Inverter

Amler¹,

Weitz²,

März³

2022

IEEE J. Emerg. Sel. Topics Power Electron.

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In recent years, research on Wireless Power Transfer and Switched-Mode Power Supplies with a capacitive coupling link has been on the rise. Whereas many researchers investigate resonant coupling links, often resulting in tough requirements for the involved inductors, this paper focuses on the elimination of all inductive components in the coupling link and the rectifier through the use of a non-resonant capacitive link. We propose a converter with a resonant single-ended push-pull inverter operating at radio frequencies of e.g. 13.56 MHz to directly drive the non-resonant capacitive power transfer link. The ability of the converter to operate at a high frequency and to facilitate a significant voltage change across the link capacitors improves the power transfer characteristics of the system compared to previously published systems with a non-resonant capacitive link. Said combination is also beneficial for the transient behavior, parameter variation robustness, an easy design process, simplified drive requirements, and a predictable and limited capacitor voltage stress. The presented converter transmits 122.9 W across an effective link capacitance of 120 pF, leading to the highest input voltage-normalized power transfer to link capacitance value of 13.7 W/(nF‧V) among previously published capacitive power transfer systems with a non-resonant link.

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Rotary Capacitive Power Transfer with Class-E Inverter And Balun Circuit

Cited by 5 publications

References 14 publications

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

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

Battery-Free and Real-Time Wireless Sensor System on Marine Propulsion Shaft Using a Wireless Power Transfer Module

Improved Capacitive Power Transfer With Non-Resonant Power Transfer Link Using Radio Frequency Push-Pull Inverter

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