Use of the Rotating Rectifier Board as a Capacitive Power Coupler for Brushless Wound Field Synchronous Machines

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

doi:10.1109/jestpe.2020.3039497

Cited by 28 publications

(6 citation statements)

References 27 publications

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“…This aim is to improve the power output of the machine by allowing for better copper utilization. Additionally, alternative exciterless schemes, based on recent work utilizing wireless power transfer systems for excitation [12], [13], and which do not impact the existing machine design, are being investigated.…”

Section: Resultsmentioning

confidence: 99%

Analytical Modelling of Harmonics in an Exciterless Synchronous Generator

Fallows

Nuzzo

Galea

2021

2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)

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The replacement of the brushless exciter in the synchronous generator has long been desired as a method to increase power density. There are many topologies available that allow the excitation system of a synchronous generator to be combined with the main magnetic circuit, but these topologies have previously only been demonstrated on low power machines. This paper develops an analytical model of an existing exciterless machine topology and uses it to produce an optimized winding configuration to convert an existing, brushless exciter based, generator design to exciterless. Harmonic performance is a key requirement for medium power designs, with strict restrictions placed on manufacturers by grid standards worldwide. Therefore, the focus of the analytical model is to accurately predict the harmonic content of the machine at no-load, including the overall output voltage shape. This is validated experimentally against a prototype machine, and the feasibility of the exciterless topology, for medium power and above applications, is discussed.

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Section: Resultsmentioning

confidence: 99%

Analytical Modelling of Harmonics in an Exciterless Synchronous Generator

Fallows

Nuzzo

Galea

2021

2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)

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“…Ludois et al [266] suggest a method that couples power to the rotor in replacement of slip rings. 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].…”

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%

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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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“…Capacitive WPT ESs have been developed over a series of papers starting with [45], in which a parallel disc capacitor arrangement is used to excite a 1.5kW machine. A similar stacked plate arrangement for an 80kW traction machine is shown in [46], followed by using printed circuit boards as the capacitive coupling in [47] for a 30kW generator. Alternative coupling arrangements using fluid bearings [48] and journal bearings [49] have also be demonstrated.…”

Section: B Capacitive Wpt Excitationmentioning

confidence: 99%

Exciterless Wound-Field Medium-Power Synchronous Machines: Their History and Future

Fallows

Nuzzo

Galea

2022

EEE Ind. Electron. Mag.

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The excitation system of the wound field synchronous machine has remained largely unchanged over the past 50 years. Nonetheless there has been significant research into exciterless solutions which, through integration of the excitation system with the main machine, aim to offer improved power density, simplified manufacture, and better cooling opportunities. This work presents the history of exciterless solutions for wound-field synchronous machines focusing on the challenges for medium power generators. The very latest innovations are discussed, signposting the future for the exciterless machine along with new challenges and opportunities for engineers.

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Use of the Rotating Rectifier Board as a Capacitive Power Coupler for Brushless Wound Field Synchronous Machines

Cited by 28 publications

References 27 publications

Analytical Modelling of Harmonics in an Exciterless Synchronous Generator

Analytical Modelling of Harmonics in an Exciterless Synchronous Generator

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

Exciterless Wound-Field Medium-Power Synchronous Machines: Their History and Future

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