Study on load adaptation of capacitive power transfer system with a four-plate compact capacitive coupler

Wu, Xingyang; Su, Yugang; Hou, Xinyu; Qing, Xiaodong; Dai, Xin

doi:10.1007/s00202-019-00820-x

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…Thus, the LCLC compensation is more robust when the operation frequency changes. Hybrid compensation networks are also reviewed, such as LC-CLC compensation to enhance the coupler misalignment performance [55] and LCL-L compensation to improve the system performance reducing the number of components [56,57]. Multi-stage networks are proposed to provide higher voltage and current gain for high power applications [58].…”

Section: Proposed Developments In Literaturementioning

confidence: 99%

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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: Proposed Developments In Literaturementioning

confidence: 99%

“…Thus, the horizontal structure is more sensitive to misalignments. Besides, the port capacitance term is proposed to derive the cross-coupling capacitors in modeling of the coupler [56,95]. The modeling of the coupling interface is presented based on the coupling coefficient term [96][97][98].…”

Section: Proposed Developments In Literaturementioning

confidence: 99%

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

et al. 2022

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“…In addition, according to the different distribution positions of the coupler plates in space, the coupling mechanism can also be divided into a parallel coupler structure and a stacked coupler structure. Because the capacitive coupling coupler has good plasticity, a CPT coupler can be designed in different shapes such as a rectangular structure [24], circular structure [25], strip coupler [26], three-dimensional coupler [27], disc coupler [28], etc. The commonly used coupling mechanisms of the CPT system are shown in Figure 4.…”

Section: Cpt Coupler Designmentioning

confidence: 99%

Research and Application of Capacitive Power Transfer System: A Review

Wang

Zhang

et al. 2022

Electronics

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Capacitive power transfer (CPT) uses an electric field as the transfer medium to achieve wireless power transfer (WPT). Benefitting from the low eddy current loss, simple system structure and strong plasticity of the coupling coupler, the CPT system has recently gained much attention. The CPT system has significantly improved transfer power, system efficiency, and transfer distance due to continuous research and discussion worldwide. This review briefly presents the basic working principle of the CPT system and summarizes the theoretical research in four aspects, including coupling coupler and high-frequency power converter. Following this, the review focuses on research in six key directions, including system modelling and efficiency optimization. The application of CPT technology in five fields, including medical devices and transportation, is also discussed. This review introduces the progress of CPT research in recent years, hoping to serve as a reference for researchers, to promote the further research and application of the CPT system.

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“…Secondly, the output power is proportional to capacitive coupling coefficient, which brings several benefits in terms of design and protection aspects. Differentiating from the existing work [7], in which the authors have only focused on design of the compensation network for the movable devices with low output power and small airgap, a design guideline of a LCL-L compensation network is given in this paper for the stationary electric vehicle battery applications with high output power (i.e. 1.5 kW) and large air-gap (i.e.…”

Section: Introductionmentioning

confidence: 99%

An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

Dahidah

Pickert

et al. 2020

IEEE Access

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This paper proposes an LCL-L compensation circuit for high power capacitive power transfer (CPT) aiming at minimizing number of resonant components and improving system performance. The proposed topology adopts only four external resonant components at both sides of the capacitive coupler. The output power is proportional to the capacitive coupling coefficient, therefore, it simplifies the design procedure and abolishes protection circuit requirements under coupler's misalignment. Moreover, optimizing efficiency at full-load conditions of compensation network can be easily achieved in this system by designing resonant components at the highest value of the mutual capacitance. Theoretical analysis of the proposed system is conducted alongside comparison to lasted CPT compensation circuits. Simulation and experimental results of a 1.5-kW CPT prototype with an air gap distance of 150 mm are provided to verify the feasibility and the effectiveness of the proposed system. System performances under different coupler's misalignment conditions and output power levels are also examined and discussed as well. INDEX TERMS Capacitive power transfer, compensation circuits, LCL-L topology, electric vehicles, battery charger.

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Study on load adaptation of capacitive power transfer system with a four-plate compact capacitive coupler

Cited by 10 publications

References 24 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

Research and Application of Capacitive Power Transfer System: A Review

An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

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