Bidirectional Undersea Capacitive Wireless Power Transfer System

Yang, Lei; Ju, Minna; Zhang, Ben

doi:10.1109/access.2019.2937888

Cited by 36 publications

(26 citation statements)

References 38 publications

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“…Both [244,245] utilize a phase-shifted control method for bidirectional electric vehicle charging and underwater charging applications, respectively. The method enables to control the power flow direction and magnitude.…”

Section: Bidirectional Chargingmentioning

confidence: 99%

“…• Bidirectional power flow capability [241][242][243][244][245] • Compact structure [241] • Soft switching feature [242,244] • High efficiency [242,245] • High tolerance to parameter variations [243] • Sensitive to horizontal misalignment [241] • Control complexity [242,244] • High computation burden [243] • High resonant component count [244,245] Electric Vehicle Robotics…”

Section: • Increased Power Transfer Capacity [42]mentioning

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: Bidirectional Chargingmentioning

confidence: 99%

Section: • Increased Power Transfer Capacity [42]mentioning

confidence: 99%

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

et al. 2022

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“…What's more, it shows that the mathematical theory power capacity of the UCPT system could be as high as MW level. A bidirectional underwater capacitive wireless power transfer (BD-UCPT) has been proposed in [31] and [32] for AUVs' battery charging applications. A 100 W experimental BD-UCPT is built and tested.…”

Section: Analysis and Design Of Four-plate Capacitive Wireless Power Transfer System For Undersea Applicationsmentioning

confidence: 99%

Analysis and design of four-plate capacitive wireless power transfer system for undersea applications

Lei

Zhang

et al. 2021

Trans. Electr. Mach. Syst.

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This paper presents a four-plate undersea capacitive wireless power transfer (CPT) system for underwater applications such as autonomous underwater vehicles (AUVs). Generally, a CPT system transfers the power based on electric fields. The complex resonant compensation networks are used to make the CPT system work in the resonant condition. The resonant voltage is always very high. It will be a big challenge to the human safety. In this paper, a virtual electrons periodic reciprocating flow theory is proposed for the CPT system. In one switching cycle, the electrons firstly flow in the forward direction through the forward path and then flow in the inverse direction through the inverse path. The CPT system has been deeply studied with the vacuum dielectric or the air dielectric. However, for the CPT system, there are few papers to show the underwater application. In this paper, an undersea four-plate CPT system is designed and studied in the underwater condition. The two coupling capacitors and other elements of the CPT system could build a closed-loop path. A small value inductor is adapted as a resonant compensation network for the four-plate CPT system. The DC voltage is inverted to the AC voltage in the primary side with the single-phase full-bridge inverter. The resonant voltage is rectified to the DC voltage in the secondary side with the single-phase full-bridge diode rectifier. A 100 W power level CPT system is constructed to verify the theory analysis and the calculation. The theory analysis is verified by the simulated and experimental results. The stable output voltage and load power are achieved in this paper. Index Terms-Wireless power transfer system, capacitive, underwater applications, autonomous underwater vehicles (AUVs).

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“…As an alternative, capacitive power transfer (CPT) provides a cheaper and lighter solution than IPT using alternating electric fields. In the literature, many papers have proposed for charging on-road electric vehicles [5], [6], electric ships [7]- [9], and autonomous underwater vehicles [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

“…Three performance metrics affect the overall system performance: the operating frequency of the system, the voltage across the capacitive couplers, and the coupling capacitance [7]. Decreasing the transfer distance, increasing the operating frequency, or increasing the voltage across the capacitors can enhance the power transfer of the system [12]. While safety regulations limit the operating frequency and voltage, we can improve the capacitance between the couplers.…”

Section: Introductionmentioning

confidence: 99%

Conformal Transformation Analysis of Capacitive Wireless Charging

et al. 2022

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This paper studies the capacitive coupling in a capacitive power transfer (CPT) system designed for charging applications. It proposes mathematical models using the conformal transformation for calculating air-gapped and underwater capacitance and verifies the proposed models using COMSOL multiphysics and measurements. The measurement results show that we can achieve nano-farad capacitance ranges if we submerge the capacitor in seawater. The seawater's capacitance slightly changes when we increase the gap distance or the operating frequency. As the under seawater CPT system can be an attractive option for loosely-coupled charging applications, we further examine the system by focusing on the crosscoupling effects. The results show that the cross-coupling between the plate degrades the system's power transfer capability and efficiency. With negligible cross-coupling effects, the system gives 129 W output power at an efficiency of 81.2%.

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Bidirectional Undersea Capacitive Wireless Power Transfer System

Cited by 36 publications

References 38 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

Analysis and design of four-plate capacitive wireless power transfer system for undersea applications

Conformal Transformation Analysis of Capacitive Wireless Charging

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