Linear motion system cable elimination via multiphase capacitive power transfer through sliding journal bearings

Dai, Jufeng; Hagen, Skyler; Ludois, Daniel C.

doi:10.1109/apec.2017.7930998

Cited by 7 publications

(5 citation statements)

References 31 publications

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“…Although Nikola Tesla firstly demonstrated WPT using capacitive coupling as early as 1891, research on CPT did not receive significant attention until 2008 [4]. Since then, several experimental works have been conducted to enhance the overall system efficiency and enable power transfer over wide separation distance ranges [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35]. Dai and Ludois [4] surveyed the empirical published works in a period between 2008 and 2015, examining relationships between different aspects of CPT systems, such as power, efficiency, frequency, and separation distance.…”

Section: Survey Of Cpt Developmentmentioning

confidence: 99%

Design Considerations of Capacitive Power Transfer Systems

et al. 2023

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Capacitive power transfer (CPT) is a near-field wireless power transfer (WPT) technology that has attracted attention in different charging applications. By utilizing electric fields, CPT gives charging systems advantages in terms of cost, weight, flexibility, and mobility. This paper surveys a number of empirical published works in a period between 2015 and 2023. Additionally, it discusses theoretical and practical design considerations of a CPT system to understand and improve the technology and its applications. The paper studies the one-and two-port measuring approaches using vector network analyzers to determine the coupling parameters and compares the measurements to the simulated values using COMSOL Multiphysics © . The two-port approach gives more accurate results than the one-port approach. The paper designs and tests a 13.56 MHz CPT system using the two-port measurement results. The system transfers 100 W at 87.4% efficiency and 30 mm separation distance. Lastly, the paper discusses the design limitations and challenges of the CPT systems, aiming to emphasize the design obstacles that can drive the advancement of the CPT systems for wireless charging applications.INDEX TERMS Wireless power transmission, capacitive power transfer, couplings, VNA, two-port.

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Section: Survey Of Cpt Developmentmentioning

confidence: 99%

Design Considerations of Capacitive Power Transfer Systems

et al. 2023

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“…Double-sided L compensation is a filter-based topology, which provides a simplified circuit structure. Herein, the capacitive coupler acts as a resonant capacitor to compensate the series inductor [26][27][28][29][30] present in multi-cell applications [31], multi-phase applications [32], and also mutual capacitance effect [33][34][35]. Furthermore, one pulse switching active capacitor (OPSAC) is used instead of a resonant inductor to resist parameter variations [36][37][38] .…”

Section: Proposed Developments In Literaturementioning

confidence: 99%

“…Conversely, the three-phase structure is not still as sufficient as it should be. Contactless CPT is achieved between stationary and rotating parts by utilizing the capacitance of the linear bearings [32,269]. A threephase structure is applied to rotary applications using e-GaN FETs [270].…”

Section: ) Three-phasementioning

confidence: 99%

“…• Increased power transfer capacity [32,269,271] • High efficiency [269,271] • Reduced voltage stress [269] • High tolerance to parameter variations [270] • High frequency ability [270] • High tolerance to misalignments [271] • More influence of parasitic components [32,270] • Control complexity [269] • High occupied space [271]…”

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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“…In practical applications, to reduce the complexity of the secondary side, the two inductors can be combined to one and placed at the primary side [57]. In addition, to increase the system power level, the full-bridge inverter can be upgraded to a three-phase inverter with three legs, and more series inductors are required for the extra leg [58]. Moreover, active circuit with MOSFETs and capacitors can be used to replace the series inductors, which can perform as inductive impedance and reduce the system size [59][60][61].…”

Section: Series L Compensationmentioning

confidence: 99%

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

2017

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Capacitive power transfer (CPT) technology is an effective and important alternative to the conventional inductive power transfer (IPT). It utilizes high-frequency electric fields to transfer electric power, which has three distinguishing advantages: negligible eddy-current loss, relatively low cost and weight, and excellent misalignment performance. In recent years, the power level and efficiency of CPT systems has been significantly improved and has reached the power level suitable for electric vehicle charging applications. This paper reviews the latest developments in CPT technology, focusing on two key technologies: the compensation circuit topology and the capacitive coupler structure. The comparison with the IPT system and some critical issues in practical applications are also discussed. Based on these analyses, the future research direction can be developed and the applications of the CPT technology can be promoted.

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Linear motion system cable elimination via multiphase capacitive power transfer through sliding journal bearings

Cited by 7 publications

References 31 publications

Design Considerations of Capacitive Power Transfer Systems

Design Considerations of Capacitive Power Transfer Systems

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

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

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