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

Lu, Fei; Zhang, Hua; Mi, Chris

doi:10.3390/en10111752

Cited by 216 publications

(144 citation statements)

References 113 publications

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“…Nevertheless, authors have presented an innovative IPT system to transfer power a distance of 5 m using dipole coils [64]. Most of the presented CPT systems are designed for low-power applications, including USB devices, lamps, and small robots [8,[65][66][67][68][69][70][71][72][73], where the transmitting distance is limited to the millimeter range. High efficiency is provided by MCR WPT for a longer transferring distance [23,34,[74][75][76][77][78][79][80][81][82].…”

Section: Introductionmentioning

confidence: 99%

Magnetically Coupled Resonance WPT: Review of Compensation Topologies, Resonator Structures with Misalignment, and EMI Diagnostics

2018

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Magnetically coupled resonance wireless power transfer systems (MCR WPT) have been developed in recent years. There are several key benefits of such systems, including dispensing with power cords, being able to charge multiple devices simultaneously, and having a wide power range. Hence, WPT systems have been used to supply the power for many applications, such as electric vehicles (EVs), implantable medical devices (IMDs), consumer electronics, etc. The literature has reported numerous topologies, many structures with misalignment effects, and various standards related to WPT systems; they are usually confusing and difficult to follow. To provide a clearer picture, this paper aims to provide comprehensive classifications for the recent contributions to the current state of MCR WPT. This paper sets a benchmark in order to provide a deep comparison between different WPT systems according to different criteria: (1) compensation topologies; (2) resonator structures with misalignment effects; and, (3) electromagnetic field (EMF) diagnostics and electromagnetic field interference (EMI), including the WPT-related standards and EMI and EMF reduction methods. Finally, WPT systems are arranged according to the application type. In addition, a WPT case study is proposed, an algorithm design is given, and experiments are conducted to validate the results obtained by simulations.

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Section: Introductionmentioning

confidence: 99%

Magnetically Coupled Resonance WPT: Review of Compensation Topologies, Resonator Structures with Misalignment, and EMI Diagnostics

2018

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“…With an increasing demands for conveniently charging electronic devices, WPT is considered as a promising solution. Much effort has been made to develop different types of WPT systems, [13][14][15][16][17][18] among which the magnetic resonant coupling has become a hot research topic since it was proposed for the first time in 2007 especially due to its potentials for safe and mid-range charging. [19][20][21] In such systems two or more resonators with the same resonance frequency are coupled by magnetic evanescent fields.…”

Section: Introductionmentioning

confidence: 99%

Smart Table Based on a Metasurface for Wireless Power Transfer

et al. 2019

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Metasurfaces have been investigated and its numerous exotic functionalities and the potentials to arbitrarily control of the electromagnetic fields have been extensively explored. However, only limited types of metasurface have finally entered into real products. Here, we introduce a concept of a metasurface-based smart table for wirelessly charging portable devices and report its first prototype. The proposed metasurface can efficiently transform evanescent fields into propagating waves which significantly improves the near field coupling to charge a receiving device arbitrarily placed on its surface wirelessly through magnetic resonance coupling. In this way, power transfer efficiency of 80% is experimentally obtained when the receiver is placed at any distances from the transmitter. The proposed concept enables a variety of important applications in the fields of consumer electronics, electric automobiles, implanted medical devices, etc. The further developed metasurface-based smart table may serve as an ultimate 2-dimensional platform and support charging multiple receivers.

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“…A promising WPT technique that has already entered as well the consumer as the industrial market is inductive wireless power transfer (IPT) [2,[21][22][23]. This near-field technique uses a varying magnetic field to transfer energy from a transmitter coil to a coupled receiver coil.…”

Section: Introductionmentioning

confidence: 99%

“…However, CPT has not yet significantly entered the market and its technology is not as maturely developed as IPT. Compared to IPT, CPT has the advantage to transfer energy through metal, and is expected to realize WPT at a lower cost and weight than IPT [22,24].…”

Section: Introductionmentioning

confidence: 99%

Coupling-Independent Capacitive Wireless Power Transfer Using Frequency Bifurcation

et al. 2018

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Capacitive wireless power transfer can be realized by mutually coupled capacitors operating at a common resonant frequency. An optimal load exists that maximizes either the efficiency or the power transfer to the load. In this work, we utilize the frequency bifurcation effect to propose a frequency agile mode that allows for a nearly coupling-independent regime. We analytically determine the operating conditions of the coupling-independent mode based on the different system gains. In this way, we obtain a solution that achieves nearly constant efficiency and power transfer, even at varying coupling. We compare our results to inductive wireless power transfer where a perfect coupling-independent mode is achievable.

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

Cited by 216 publications

References 113 publications

Magnetically Coupled Resonance WPT: Review of Compensation Topologies, Resonator Structures with Misalignment, and EMI Diagnostics

Magnetically Coupled Resonance WPT: Review of Compensation Topologies, Resonator Structures with Misalignment, and EMI Diagnostics

Smart Table Based on a Metasurface for Wireless Power Transfer

Coupling-Independent Capacitive Wireless Power Transfer Using Frequency Bifurcation

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