A Double-Sided &lt;italic&gt;LCLC&lt;/italic&gt;-Compensated Capacitive Power Transfer System for Electric Vehicle Charging

Lu, Fei; Zhang, Hua; Hofmann, Heath; Mi, Chris

doi:10.1109/tpel.2015.2446891

Cited by 353 publications

(102 citation statements)

References 9 publications

(8 reference statements)

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“…For the same target specification with the same operating frequency of 250kHz, the conventional L-C-L matching network in [4,5,6] are designed and the results are compared with the proposed one in Table 1. It is clear that the proposed method reduces the size as well as the number of the resonant components.…”

Section: Further Discussionmentioning

confidence: 99%

“…However, the operating frequency becomes relatively too high and the voltage stress was not discussed fully in this literature. Another scheme adding L-C-L-type matching filters in the front-end and back-end of link capacitors increases power factor and handles more output power without increasing the operating frequency [4,5,6], but additional five resonant components -three inductors and two capacitors -should be designed, and the design procedure based on iterative process are too complex.…”

Section: Introductionmentioning

confidence: 99%

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Design Guidelines for a Capacitive Wireless Power Transfer System with Input/Output Matching Transformers

Choi¹

2016

Journal of Electrical Engineering and Technology

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-A capacitive wireless power transfer (C-WPT) system uses an electric field to transmit power through a physical isolation barrier which forms a pair of ac link capacitors between the metal plates. However, the physical dimension and low dielectric constant of the interface medium severely limit the effective link capacitance to a level comparable to the main switch output capacitance of the transmitting circuit, which thus narrows the soft-switching range in the light load condition. Moreover, by fundamental limit analysis, it can be proved that such a low link capacitance increases operating frequency and capacitor voltage stress in the full load condition. In order to handle these problems, this paper investigates optimal design of double matching transformer networks for C-WPT. Using mathematical analysis with fundamental harmonic approximation, a design guideline is presented to avoid unnecessarily high frequency operation, to suppress the voltage stress on the link capacitors, and to achieve wide ZVS range even with low link capacitance. Simulation and hardware implementation are performed on a 5-W prototype system equipped with a 256-pF link capacitance and a 200-pF switch output capacitance. Results show that the proposed scheme ensures zero-voltage-switching from full load to 10% load, and the switching frequency and the link capacitor voltage stress are kept below 250 kHz and 452 V, respectively, in the full load condition.

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Section: Further Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Guidelines for a Capacitive Wireless Power Transfer System with Input/Output Matching Transformers

Choi¹

2016

Journal of Electrical Engineering and Technology

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“…Array coil [67] MIMO-coils [80] Four-coils [15, 62-64, 81, 111-115] Dual Tx & Rx [83] Domino coil [66] Five-coils [119] Two-coils [12,[116][117][118] LC-LC circuit [82] SIMO-coils [120] Conformal bumper [124] Single-switch-Single-diode [84 ] Double-Sided LCLC [85] Parallel discs [122,123] Hexagonal cell array [131] Matrix charging pad [130] Single plate [125][126][127][128][129] Two flat rectangular Tx-Rx [87] Single Tx-single Rx [33,69,[91][92][93][94][95][96][97][98][99][100][101][102][103][104][105] Multi-Rx [76,106] Rectangular [78] MRC CC Circular [78] Hexagonal [78] YZ & XZ plane [121] Single ...…”

Section: Wpt Icmentioning

confidence: 99%

Opportunities and Challenges for Near-Field Wireless Power Transfer: A Review

et al. 2017

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Abstract:Traditional power supply cords have become less important because they prevent large-scale utilization and mobility. In addition, the use of batteries as a substitute for power cords is not an optimal solution because batteries have a short lifetime, thereby increasing the cost, weight, and ecological footprint of the hardware implementation. Their recharging or replacement is impractical and incurs operational costs. Recent progress has allowed electromagnetic wave energy to be transferred from power sources (i.e., transmitters) to destinations (i.e., receivers) wirelessly, the so-called wireless power transfer (WPT) technique. New developments in WPT technique motivate new avenues of research in different applications. Recently, WPT has been used in mobile phones, electric vehicles, medical implants, wireless sensor network, unmanned aerial vehicles, and so on. This review highlights up-to-date studies that are specific to near-field WPT, which include the classification, comparison, and potential applications of these techniques in the real world. In addition, limitations and challenges of these techniques are highlighted at the end of the article.

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“…As a kind of transmission mode, capacitive power transfer (CPT, or capacitively coupled power transfer, CCPT) technologies [5], [6] are attracting a growing number of researchers due to their advantages such as design flexibility, reduced volume and weight of the coupling structure and metal penetration capability [7], [8] because capacitive plates are utilized as the coupling structure. CPT technologies have been used in rotating devices [9], mobile robots [10], biological implants [11], cell phones [12], and electric vehicles [13], [14].…”

Section: Introductionmentioning

confidence: 99%

An Interference Isolation Method for Wireless Power and Signal Parallel Transmissions on CPT Systems

Zhou¹,

Su²,

Xie³

et al. 2017

Journal of Power Electronics

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A novel interference isolation method is proposed by using several designed coils in capacitive power transfer systems as isolation impedances. For each designed coil, its stray parameters such as the inter-turn capacitance, coil resistance and capacitance between the coil and the core, etc. are taken into account. An equivalent circuit model of the designed coil is established. According to this equivalent circuit, the impedance characteristic of the coil is calculated. In addition, the maximum impedance point and the corresponding excitation frequency of the coil are obtained. Based on this analysis, six designed coils are adopted to isolate the interference from power delivery. The proposed method is verified through experiments with a power carrier frequency of 1MHz and a data carrier frequency of 8.7MHz. The power and data are transferred parrallelly with a data carrier attenuation lower than -5dB and a power attenuation on the sensing resistor higher than -45dB.

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A Double-Sided <italic>LCLC</italic>-Compensated Capacitive Power Transfer System for Electric Vehicle Charging

Cited by 353 publications

References 9 publications

Design Guidelines for a Capacitive Wireless Power Transfer System with Input/Output Matching Transformers

Design Guidelines for a Capacitive Wireless Power Transfer System with Input/Output Matching Transformers

Opportunities and Challenges for Near-Field Wireless Power Transfer: A Review

An Interference Isolation Method for Wireless Power and Signal Parallel Transmissions on CPT Systems

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