An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

Vu, Van-Binh; Dahidah, Mohamed; Pickert, Volker; Phan, Van-Tung

doi:10.1109/access.2020.2971961

Cited by 39 publications

(20 citation statements)

References 28 publications

(66 reference statements)

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“…Thus, the LCLC compensation is more robust when the operation frequency changes. Hybrid compensation networks are also reviewed, such as LC-CLC compensation to enhance the coupler misalignment performance [55] and LCL-L compensation to improve the system performance reducing the number of components [56,57]. Multi-stage networks are proposed to provide higher voltage and current gain for high power applications [58].…”

Section: Proposed Developments In Literaturementioning

confidence: 99%

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: Proposed Developments In Literaturementioning

confidence: 99%

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

et al. 2022

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“…For line regulation, the duty cycle range can be obtained by (13) and the minimum load resistance is obtained as follows:…”

Section: Design Proceduresmentioning

confidence: 99%

“…2. In [13]- [16], special IMNs and OMNs are introduced to improve gain and ZVS characteristics, but these require multiple LC networks that make the system more complex. Their fundamental limitation is that they only step down the voltage and thus cannot cover variations over a wide input voltage range using an inverter alone.…”

Section: Introductionmentioning

confidence: 99%

Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

Truong

Choi

2021

IEEE Access

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Capacitive wireless power transfer (CPT) is becoming a promising alternative to inductive power transfer (IPT) due to low costs and the simplicity of capacitive coupler. This paper presents a new architecture that makes CPT systems even simpler and easier to control. In the proposed scheme, a wide input voltage range is achieved by duty control while the output voltage is inherently load-independent, and this eliminates the need for an extra DC-DC converter. Our system also provides an extended zerovoltage-switching (ZVS) range to deal with both input and load variations. We carried out ZVS analysis for each MOSFET switch and based on this an optimal design was proposed. We implemented a prototype 160 W CPT system based on our design procedure, and its performance was then verified under a universal input voltage with load variations from 200-1000 Ω. A DC-DC efficiency as high as 88.2 % was achieved, showing the value of the proposed topology.INDEX TERMS Asymmetric half-bridge, capacitive wireless power transfer, zero voltage switching.

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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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An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

Cited by 39 publications

References 28 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

Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

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

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