Separated Circular Capacitive Couplers for Rotational Misalignment of Drones

Park, Chanjun; Park, Jaehyoung; Shin, Yujun; Huh, Sungryul; Kim, Jong-Wook; Ahn, Seungyoung

doi:10.1109/wptc45513.2019.9055550

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…Considering CPT applications, the receiver side of the system is minimized to ensure compatibility [253,254], and to obtain the maximum efficiency [255]. A capacitive coupler design is proposed to decrease parasitic capacitances with a rotational misalignment capability [113,256]. A master/slave approach between drones is suggested for increasing flight range by using different coupling configurations [257].…”

Section: ) Drone (Uav)mentioning

confidence: 99%

“…• Reduced cross-coupling capacitance [113] • High efficiency [113,255] • Reduced size [253] • High tolerance to misalignments [256] • Increased flight range [254] • High occupied space [113,256] • Relatively low efficiency [253] • High computation burden [255] • Require extra circuitry [254] Underwater • High efficiency [262,264] • High tolerance to misalignments [263] • Increased transfer distance [258,263] • Design complexity [262][263][264] • No insulation layer on the plate [262] • Increased cost [258,263] • Compact structure [265] • No sensitive to speed [265,266,268] • High efficiency [267] • Control complexity [59,267,268] • Requires extra circuitry [59,268] • More influence of parasitic components [59,[265][266][267][268] Three-phase…”

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: ) Drone (Uav)mentioning

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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“…Although the WPT system for missiles has been studied up to 300 W through the conventional study [7], it has a limitation in that it is a WPT system that transfers power to a single load through a single power source. Likewise, studies for drones and UAVs all deliver up to 325 W of power [5], [27]- [28], but these studies have nothing to do with transferring power to two loads through two input Drones 150 W X [28] UAVs 325 W X power sources. That is, this study is a very practical study designed in consideration of the actual missile operation environment, and has the advantage of being able to transfer power to two loads with two input power sources with a voltage difference of 13 times.…”

Section: Comparison With Other High-power Wpt Systems Of Several Hund...mentioning

confidence: 99%

Design of a Wireless Power Transfer System With Two Inputs With Large Voltage Differences for Missiles Mounted on Maritime Vessels

et al. 2022

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Missiles mounted on maritime vessels have two types of loads. One is the operating load consumed just before launch, and the other is the safety sensors load that must always be activated for safety. Because the operating load consumes a large power capacity, the power generated by the vessel's own power generators must be supplied. Meanwhile, the loads for safety sensors are supplied through an energy storage system (ESS) because the safety sensors must be supplied with power even when the generators stop. However, the voltage difference between the generated power and the ESS power reaches ten times or more. Therefore, there is a problem in that the input of the two power sources with a large input difference must be transferred to two loads through only a pair of coils. To solve this problem, a WPT system is proposed to overcome the voltage difference between the generated power and the ESS power. The design method of the proposed system is analyzed mathematically, and it is verified through simulations and experiments. The proposed system has a maximum dc to dc power transfer efficiency of 76.8% with a capacity of 550 W and has the advantage that power is continuously supplied to the sensor loads even if the input voltage source is changed. In addition, by operating the proposed WPT system under a wide load of 200 W to 1000 W, the effectiveness of the proposed WPT system is proved.

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“…Murata Electronics Europe adopted this method, and it has become popular because of good galvanic isolation, low cost, and the potential for operation at a higher frequency rating than that of the magnetic core [4,5]. The CPT system has been widely used in previous applications, such as electric vehicle (EV) charging [6][7][8][9][10], drones [11][12][13], variable message displays [14], and others. Previous research on low-power [11,15] and high-power [16] applications of CPT has been conducted with a reported efficiency of more than 90%.…”

Section: Introductionmentioning

confidence: 99%

Scaling-Factor and Design Guidelines for Shielded-Capacitive Power Transfer

2020

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This paper introduces scaling-factor and design guidelines for shielded-capacitive power transfer (shielded-CPT) systems, offering a simplified design process, coupling-structure optimization, and consideration of safety. A novel scaling-factor-analysis method is proposed by determining the configuration of the coupling structure that improves system safety and increases operating efficiency while minimizing the gap between the shield and the coupler plate. The inductor-series resistance is also analyzed to study the loss efficiency in the shielded-CPT system. The relationship among the shield-coupler gap, distance between the couplers, conductive-plate size, and delivered power is examined and presented. The proposed method is validated by implementing the shielded-CPT system with hardware and the result suggests that the proposed method can be used to design shielded-CPT systems with scaling-factor and safety considerations.

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Separated Circular Capacitive Couplers for Rotational Misalignment of Drones

Cited by 8 publications

References 6 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

Design of a Wireless Power Transfer System With Two Inputs With Large Voltage Differences for Missiles Mounted on Maritime Vessels

Scaling-Factor and Design Guidelines for Shielded-Capacitive Power Transfer

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