Generalized Circuit Model of Shielded Capacitive Power Transfer

Ahmad, Suziana; Hattori, Reiji; Muharam, Aam

doi:10.3390/en14102826

Cited by 7 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This structure is a four-plate parallel structure with two extra shielding plates to provide better protection against electric fields, as seen in Figure 14 d. The additional plates do not take part in the power transfer and are only coupled via parasitic capacitance. Studies have shown that this approach improves safety and efficiency [ 23 , 24 , 25 , 26 ].…”

Section: Electromagnetic-coupled Technologiesmentioning

confidence: 99%

Wireless Power Transfer: Systems, Circuits, Standards, and Use Cases

Mulders¹,

Delabie²,

Lecluyse³

et al. 2022

Sensors

View full text Add to dashboard Cite

Wireless power transfer provides a most convenient solution to charge devices remotely and without contacts. R&D has advanced the capabilities, variety, and maturity of solutions greatly in recent years. This survey provides a comprehensive overview of the state of the art on different technological concepts, including electromagnetic coupled and uncoupled systems and acoustic technologies. Solutions to transfer mW to MW of power, over distances ranging from millimeters to kilometers, and exploiting wave concepts from kHz to THz, are covered. It is an attractive charging option for many existing applications and moreover opens new opportunities. Various technologies are proposed to provide wireless power to these devices. The main challenges reside in the efficiency and range of the transfer. We highlight innovation in beamforming and UV-assisted approaches. Of particular interest for designers is the discussion of implementation and operational aspects, standards, and safety relating to regulations. A high-level catalog of potential applications maps these to adequate technological options for wireless power transfer.

show abstract

Section: Electromagnetic-coupled Technologiesmentioning

confidence: 99%

Wireless Power Transfer: Systems, Circuits, Standards, and Use Cases

Mulders¹,

Delabie²,

Lecluyse³

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…When the plate structures become more complex, as is the case of, e.g., six-plate structure or the matrix structure, a pi-model is no longer suited to analyze the characteristics of the coupling structure [50,55]. Moreover, determining or measuring the mutual capacitance between any two plates for a complex arrangement is far from straightforward.…”

Section: Two-port Networkmentioning

confidence: 99%

“…The main purpose of the extra shielding part is to reduce the electric field emissions. The studies [47,50,55,62] have shown that this six-plate structure improves the system safety and efficiency. As there are two more plates, the coupling model of the six-plate structure consists of fifteen capacitances which makes the analysis of the coupling more complicated as discussed in Section 2.2.…”

Section: Six-plate Structurementioning

confidence: 99%

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

2021

View full text Add to dashboard Cite

Wireless power transfer allows the transfer of energy from a transmitter to a receiver without electrical connections. Compared to galvanic charging, it displays several advantages, including improved user experience, higher durability and better mobility. As a result, both consumer and industrial markets for wireless charging are growing rapidly. The main market share of wireless power is based on the principle of inductive power transfer, a technology based on coupled coils that transfer energy via varying magnetic fields. However, inductive charging has some disadvantages, such as high cost, heat dissipation, and bulky inductors. A promising alternative is capacitive wireless power transfer that utilizes a varying electric field as medium to transfer energy. Its wireless link consists of conductive plates. The purpose of this paper is to review the state of the art, link the theoretical concepts to practical cases and to indicate where further research is required to take next steps towards a marketable product. First, we describe the capacitive link via a coupling model. Next, we highlight the recent progress in plate topologies. Additionally, the most common compensation networks, necessary for achieving efficient power transfer, are reviewed. Finally, we discuss power electronic converter types to generate the electric field.

show abstract

“…Compared to the traditional plug-in charger, the wireless power transfer (WPT) technique possesses the advantages of convenience, safety, and isolation [1,2]. The inductive power transfer (IPT) technique [3][4][5] and capacitive power transfer (CPT) technique [6][7][8] are two main solutions of WPT. The coupler of IPT is two physically separated coils of a loosely coupled transformer.…”

Section: Introductionmentioning

confidence: 99%

A Novel Compensation Circuit for Capacitive Power Transfer System to Realize Desired Constant Current and Constant Voltage Output

et al. 2022

View full text Add to dashboard Cite

Capacitive power transfer (CPT) technique possesses the advantages of safety, isolation, low cost, and insensitivity to conductive barriers. To charge lithium-ion batteries, CPT should possess the output profile consisting of first constant current (CC) output and later constant voltage (CV) output. To fulfill the output profile, many power switches or compensation components are added in the CPT circuit, which is not expected due to the bulky size and additional losses. To reduce the redundancy of the CPT system, an Lx-PS CPT circuit with only five compensation components is proposed in this paper. After a systematic analysis and a parameter design procedure, the proposed CPT circuit can realize input ZPA at both CC and CV modes. In addition, the output current at CC mode and the output voltage at CV mode are all adjustable based on the charging demands of different loads. Finally, simulations are done to prove the analysis in this paper. Compared to previous research, the CPT circuit proposed in this paper can not only achieve the charging demands of lithium-ion batteries, but also reduce the redundancy of the whole system.

show abstract

Generalized Circuit Model of Shielded Capacitive Power Transfer

Cited by 7 publications

References 28 publications

Wireless Power Transfer: Systems, Circuits, Standards, and Use Cases

Wireless Power Transfer: Systems, Circuits, Standards, and Use Cases

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

A Novel Compensation Circuit for Capacitive Power Transfer System to Realize Desired Constant Current and Constant Voltage Output

Contact Info

Product

Resources

About