Capacitive Power Transfer System With a Mixed-Resonant Topology for Constant-Current Multiple-Pickup Applications

Su, Yugang; Xie, Shiyun; Hu, Aiguo Patrick; Tang, Chunsen; Zhou, Wei; Huang, Liang

doi:10.1109/tpel.2016.2640314

Cited by 69 publications

(32 citation statements)

References 29 publications

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“…A GS66508T FET and PMEG6045 diode were used as our inverter and rectifier, respectively. Please note that Equations (7) and (8) are generally applicable to different systems with different component parameters. Table 1 provides circuit parameters.…”

Section: Resultsmentioning

confidence: 99%

“…Such a system has previously been investigated for biomedical applications [1], electric vehicles [2][3][4][5], mobile devices [6], and constant-current applications [7]. Although a variety of circuit topologies are available for capacitive power system [1][2][3][4][5][6][7][8], an inductor-capacitor (LC) section in a receiver (RX) is the simplest topology for systems with small coupling capacitances [2,3]. Additional matching inductors, such as those in [5], require a large inductance value (~240 µH), which is too bulky.…”

Section: Introductionmentioning

confidence: 99%

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Optimum Receiver-Side Tuning Capacitance for Capacitive Wireless Power Transfer

Huh

Ahn

2019

Electronics

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This paper reveals the optimum capacitance value of a receiver-side inductor-capacitor (LC) network to achieve the highest efficiency in a capacitive power-transfer system. These findings break the usual convention of a capacitance value having to be chosen such that complete LC resonance happens at the operating frequency. Rather, our findings in this paper indicate that the capacitance value should be smaller than the value that forms the exact LC resonance. These analytical derivations showed that as the ratio of inductor impedance divided by plate impedance increased, the optimum Rx capacitance decreased. This optimum capacitance maximized the TX-to-RX transfer efficiency of a given set of system conditions, such as matching inductors and coupling plates.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimum Receiver-Side Tuning Capacitance for Capacitive Wireless Power Transfer

Huh

Ahn

2019

Electronics

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show abstract

“…Comparing (3) and Ref. [2], we can see that when CLC works under ω 2-s , the system output current is independent of load, which means that the system has the output characteristic of constant current in such case; while CLC works under ω 2-s , the system output voltage is independent of load, which means that the system has constant-voltage output characteristic in such case.…”

Section: Analysis Of the Multiresonance Characteristics Based On The mentioning

confidence: 87%

Investigation of the constant‐voltage, constant‐current, and power characteristics of capacitive power transfer systems based on double‐CLC topology

Xia

Chen

Liu

et al. 2018

IEEJ Transactions Elec Engng

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To achieve a power supply mode that can load constant current, constant voltage, and high power, there are some problems in capacitive power transfer (CPT) systems such as complicated control structure and poor control effects. To solve these problems, a new CPT system based on the double‐CLC topology is proposed, which can accurately calculate the frequency points of the multiresonance of the system and analyze different output characteristics of each resonance point; Hereby, taking the three‐phase wireless charging as an example, based on the switching of resonance points, a control mode to achieve constant‐current, constant‐voltage, and high‐power output of the system is proposed and studied. While not adding extra auxiliary circuits or increasing controlling complexity, it can meet some power demands of loaded constant current, constant voltage, and high‐power output. First, this article puts forward a new CPT circuit mode based on the double‐CLC topology. Then, through theoretical derivation, its multiresonance characteristics are analyzed; Third, by formula derivation and software simulations, the system power output and the relationship between load and frequency are achieved. Finally, using experimental measures, the operation performance of the CPT system based on the double‐CLC topology, in the case of multiresonance, was verified. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…There are already some pioneering works, such as the matrix transmitter and multiple pickup CPT systems as presented in [94,95]. In the future, the study on these systems can be a very promising research direction.…”

Section: Electric Field Repeatermentioning

confidence: 99%

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

2017

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Capacitive power transfer (CPT) technology is an effective and important alternative to the conventional inductive power transfer (IPT). It utilizes high-frequency electric fields to transfer electric power, which has three distinguishing advantages: negligible eddy-current loss, relatively low cost and weight, and excellent misalignment performance. In recent years, the power level and efficiency of CPT systems has been significantly improved and has reached the power level suitable for electric vehicle charging applications. This paper reviews the latest developments in CPT technology, focusing on two key technologies: the compensation circuit topology and the capacitive coupler structure. The comparison with the IPT system and some critical issues in practical applications are also discussed. Based on these analyses, the future research direction can be developed and the applications of the CPT technology can be promoted.

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Capacitive Power Transfer System With a Mixed-Resonant Topology for Constant-Current Multiple-Pickup Applications

Cited by 69 publications

References 29 publications

Optimum Receiver-Side Tuning Capacitance for Capacitive Wireless Power Transfer

Optimum Receiver-Side Tuning Capacitance for Capacitive Wireless Power Transfer

Investigation of the constant‐voltage, constant‐current, and power characteristics of capacitive power transfer systems based on double‐CLC topology

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

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