Synchronous generator field excitation via capacitive coupling through a journal bearing

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

doi:10.1109/ecce.2016.7855488

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…A rotating rectifier board as a coupler is suggested for wound field synchronous machines [267]. On the other hand, the synchronous generator field excitation is elaborated using CPT technology considering minimized cost [268] and voltage regulation [59]. In summary, CPT technology is preferred in synchronous machines to feed the rotor field winding without using slip rings and rotary transformers.…”

Section: ) Synchronous Machinesmentioning

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%

“…Advantages and disadvantages of CPT applications. Easy to manufacture[59,268] • Cost effective[59,267,268]…”

mentioning

confidence: 99%

See 2 more Smart Citations

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: ) Synchronous Machinesmentioning

confidence: 99%

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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“…To remove these components, wireless power transfer techniques can be applied to transfer power to the wound rotor. The techniques can be implemented using a capacitively coupled approach [14].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Half-Wave Rectified Excitation PM motors with Different Hybridization Ratios for Variable Speed Drive

Mamo,

Yuichi,

Tsuyoshi

2023

Journal of the Japan Society of Applied Electromagnetics and Me

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In this study, we compare three designs of half-wave rectified excitation PM motors, possibly for use in variable speed drive applications. Each proposed motor has a different ratio of permanent magnet excitation to total field excitation (hybridization ratio). The hybridization ratios are selected based on the dominance of magnetic flux contribution to the air-gap by the permanent magnet or field winding excitation. In order to investigate the effect of hybridization ratio on motor performance, a comparison study has been conducted at base speed, low-speed and high-speed region. The comparison is performed using the finite element method.

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“…In addition, a contactless power transfer system based on capacitive coupling was proposed. Ludois et al designed a wound field synchronous machine base on the principle of capacitive coupling and studied its performance [8][9][10][11]. However, its structure is complex and its axial dimension is large.…”

Section: Introductionmentioning

confidence: 99%

Rotor Field Oriented Control of Resonant Wireless Electrically Excited Synchronous Motor

Bao

Zhong

et al. 2019

WEVJ

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In order to solve the problems of wear and spark of the brush and slip ring in an electrically excited synchronous motor (EESM), based on the principle of magnetic resonance coupling wireless power transfer (MRC-WPT), a resonant wireless excitation system of EESM is designed. By modeling the EESM and analyzing the rotor field oriented control (RFOC) method, a control system of the resonant wireless EESM (RW-EESM) is established. Furthermore, the stator current distribution strategy is analyzed. Finally, a test of the RE-EESM prototype is carried out. The test results show that the motor can realize no-load stable operation, and the test speed is maintained at 85 r/min. The results show that the wireless excitation scheme of EESM is feasible, and the RFOC of RW-EESM motor is reasonable.

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Synchronous generator field excitation via capacitive coupling through a journal bearing

Cited by 10 publications

References 20 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

Comparative Study of Half-Wave Rectified Excitation PM motors with Different Hybridization Ratios for Variable Speed Drive

Rotor Field Oriented Control of Resonant Wireless Electrically Excited Synchronous Motor

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