A modified resonant converter for wireless capacitive power transfer systems used in battery charging applications

Rozario, Deepak; Azeez, Najath Abdul; Williamson, Sheldon S.

doi:10.1109/itec.2016.7520272

Cited by 18 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, a composite LCL configuration allows for both increasing or decreasing the voltage, depending on the required operation regime. It has the ability to operate in zero voltage switching conditions outside resonance and is able to increase the power factor at the interface with a low EMI [63,[76][77][78]. A modified LLC topology utilizes a shunt inductor on the secondary side to be able to operate outside resonance conditions, increasing the versatility of the CPT system [67,76,79].…”

Section: Other Compensation Topologiesmentioning

confidence: 99%

“…It has the ability to operate in zero voltage switching conditions outside resonance and is able to increase the power factor at the interface with a low EMI [63,[76][77][78]. A modified LLC topology utilizes a shunt inductor on the secondary side to be able to operate outside resonance conditions, increasing the versatility of the CPT system [67,76,79]. In addition, transformers on the primary and/or secondary side can realize the required voltage change and serve as impedance transformation [80][81][82].…”

Section: Other Compensation Topologiesmentioning

confidence: 99%

See 1 more Smart Citation

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

Section: Other Compensation Topologiesmentioning

confidence: 99%

Section: Other Compensation Topologiesmentioning

confidence: 99%

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

2021

View full text Add to dashboard Cite

show abstract

“…Based on this characteristic, the technology is suitable for applications where there are metal objects present between the antenna. Therefore, the systems could be used in charging platforms of mobiles, laptops, electric vehicles etc [11].…”

Section: Figure 2: Comparison Of Ipt and Cpt Techniquesmentioning

confidence: 99%

“…A CPT system would be a better choice as eddy current losses are absent and the system has low standing power losses. Due to its low standing power losses, the CPT system can be used in biomedical implants [11]. Besides that, we know that the design of magnetics is a complete area by itself.…”

Section: Figure 2: Comparison Of Ipt and Cpt Techniquesmentioning

confidence: 99%

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

2019

IJRTE

View full text Add to dashboard Cite

Wireless power transfer using electric and magnetic near-fields has been used in many applications widely, and biomedical implants being one of them. The most commonly used method for powering power wirelessly to biomedical implantable device is using inductive coupling between two mutually-coupled coils. In this paper, a consider new method will be proposed in transferring power for biomedical device which is based on capacitive coupling and known as capacitive power transfer (CPT) system. The main reasons of using this method are the low electromagnetic interference (EMI), can reduce power losses and the abilities to transfer power across metal barriers compared to inductive power transfer. To be specific, in this work, we have designed Class E circuit as an inverter to convert the 12VDC to AC with 1 MHz frequency. The prototype of the capacitive power transfer for implantable application has also been successfully developed with capacitive plate dimensions of 3cmx3cm width per length for receiver plate and 4cmx4cm for transmitter plate, respectively. 5mm thickness of beef separation between the plates is used in this paper. The design specification of this work is accordance to stimulator for peripheral nerve implantable device which only needs 100 mW of power to operate in the CPT system. Overall, the developed CPT system for the biomedical device is able to deliver 76mWatt with 41.43% efficiency. To enhance the efficiency, the impedance matching circuit has been proposed in this work and the prototype is now able to deliver 140mWatt power to the DC load, achieving zero voltage switching (ZVS) waveform and efficiency of 77.5%.

show abstract

“…However, the magnetic field of inductor is easily affected by metallic materials, causing the system efficiency drops sharply with this interference [8]. Contrary to the IPT, the capacitive power transfer (CPT) technology is more stable in metal surrounding environment [9][10][11][12]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Design of auto frequency tuning capacitive power transfer system based on class‐E ² dc/dc converter

Nguang

et al. 2017

IET Power Electronics

View full text Add to dashboard Cite

This study presents the design of capacitive wireless power transfer systems based on a suboptimal Class-E 2 converter approach. The main reason for selecting the suboptimal Class-E 2 converter is due to its ability of maintaining its high efficiency over a wide bandwidth of operation frequency. However, Class-E 2 converters in general are sensitive to its load's variation. This variation greatly affects the output voltage and increases the switching loss of the system. Motivated by this drawback, the authors develop an auto-frequency tuning mechanism based on a PI approach for the suboptimal Class-E 2 converter to regulate the output voltage and minimise the switching loss. A non-contact communication mechanism is also developed to transmit the secondary side's measurements to the primary side. Finally, simulation and experiment are carried out to verify the effectiveness of the auto-frequency tuning mechanism.

show abstract

A modified resonant converter for wireless capacitive power transfer systems used in battery charging applications

Cited by 18 publications

References 20 publications

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

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

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

Design of auto frequency tuning capacitive power transfer system based on class‐E ² dc/dc converter

Contact Info

Product

Resources

About

A modified resonant converter for wireless capacitive power transfer systems used in battery charging applications

Cited by 18 publications

References 20 publications

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

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

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

Design of auto frequency tuning capacitive power transfer system based on class‐E 2 dc/dc converter

Contact Info

Product

Resources

About

Design of auto frequency tuning capacitive power transfer system based on class‐E ² dc/dc converter