Multi-string capacitively isolated quasi- resonant LED driver

Bazarov, A. A.; Abramovitz, Alexander; Shmilovitz, Doron

doi:10.1109/optim.2017.7975052

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…The authors concluded that lower cost, higher efficiency, and a straightforward structure are obtained [202][203][204], and further lower current distortion for the CPT system [205].…”

Section: ) Led Lightingmentioning

confidence: 99%

“…• Reduced size [202][203][204] • Cost effective [202][203][204]209] • High efficiency [202][203][204][205] • Soft switching feature [205] • Increased power transfer capacity [206] • Easy to manufacture [209] • High tolerance to parameter variations [209] • Limited transfer distance [202][203][204][205] • High occupied space [206] • Sensitive to size [206] • Increased cost [205,207] Portable Device Charging…”

Section: ) Multiple Transmitters/receiversmentioning

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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“…The authors concluded that lower cost, higher efficiency, and a straightforward structure are obtained [202][203][204], and further lower current distortion for the CPT system [205].…”

Section: ) Led Lightingmentioning

confidence: 99%

Section: ) Multiple Transmitters/receiversmentioning

confidence: 99%

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

et al. 2022

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“…Many previous studies have presented circuit architectures using Class Y capacitors as isolation components and these capacitors replace transformers as energy transfer compo-nents. However, this is only for LED lighting [2][3][4][5][6][7][8] or electric vehicle chargers [9,10], and is characterized by the fact that the secondary side is not in contact with the human body.…”

Section: Safety Capacitorsmentioning

confidence: 99%

An LLC Converter with Capacitive Insulation

Yau

Hung²

2022

Applied Sciences

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Offline power converter products must apply for and pass the national electrical safety code before they can be marketed. The transformers of offline power converters must be made from certificated materials with a high voltage rating and high electrical insulation, which increases the volume of the transformers and the printed circuit boards. In most studies, the miniaturization of a power converter is usually achieved by increasing the conversion efficiency and reducing the heat sink, or by increasing the switching frequency to reduce the size of the transformers. In this paper, the insulation material is reduced to miniaturize the transformer of the LLC converter. The resonant capacitor of the LLC converter is used to meet the requirements of insulation voltage, leakage current, creepage, and clearance. A prototype with the specifications of 12 V and 10 A rated output was built to verify the proposed method.

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