A Comparative Study of Capacitive Couplers in Wireless Power Transfer

Al-Saadi, Mohammed; Al-Qaisi, Mustafa A. Fadel; Al-Bahrani, Layth Tawfeeq; Al-Omari, Ali Hussein; Crăciunescu, Aurelian

doi:10.1109/isfee.2018.8742470

Cited by 9 publications

(8 citation statements)

References 7 publications

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“…The system comprises a transmitter and a receiver. The transmitter features filters to eliminate unwanted harmonics, a rectifier for AC/DC conversion, and an inverter that generates high-frequency AC power to excite the transmitter plate ( Al-Saadi et al, 2018 ).…”

Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

“…In active operation, opposite charges on adjacent plates of the transmitter create an alternating electric field, facilitating power transfer to the receiver. The receiver then converts the received AC power back to DC, making it suitable for biomedical implants ( Al-Saadi et al, 2018 ). One study demonstrated power transfer capabilities through a 5 mm layer of biological tissue (beef) between two 3 cm square plates, employing Class E zero voltage switching to generate an alternating current at a 1 MHz frequency, offering solutions to several limitations inherent in the traditional bipolar CPT method ( Al-Saadi et al, 2018 ).…”

Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

“…Optimization of these parameters not only enhances power transfer but can also reduce the SAR, thereby improving the system’s overall safety profile. Material selection and dimensional considerations, especially for coaxial cables, are also a critical factor for minimizing high-frequency eddy current losses ( Al-Saadi et al, 2018 ).…”

Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

See 2 more Smart Citations

Comparative analysis of energy transfer mechanisms for neural implants

Miziev,

Pawlak,

Howard

2024

Front. Neurosci.

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As neural implant technologies advance rapidly, a nuanced understanding of their powering mechanisms becomes indispensable, especially given the long-term biocompatibility risks like oxidative stress and inflammation, which can be aggravated by recurrent surgeries, including battery replacements. This review delves into a comprehensive analysis, starting with biocompatibility considerations for both energy storage units and transfer methods. The review focuses on four main mechanisms for powering neural implants: Electromagnetic, Acoustic, Optical, and Direct Connection to the Body. Among these, Electromagnetic Methods include techniques such as Near-Field Communication (RF). Acoustic methods using high-frequency ultrasound offer advantages in power transmission efficiency and multi-node interrogation capabilities. Optical methods, although still in early development, show promising energy transmission efficiencies using Near-Infrared (NIR) light while avoiding electromagnetic interference. Direct connections, while efficient, pose substantial safety risks, including infection and micromotion disturbances within neural tissue. The review employs key metrics such as specific absorption rate (SAR) and energy transfer efficiency for a nuanced evaluation of these methods. It also discusses recent innovations like the Sectored-Multi Ring Ultrasonic Transducer (S-MRUT), Stentrode, and Neural Dust. Ultimately, this review aims to help researchers, clinicians, and engineers better understand the challenges of and potentially create new solutions for powering neural implants.

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Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

Section: Existing Methods Of Delivering Power To Implantsmentioning

confidence: 99%

See 1 more Smart Citation

Comparative analysis of energy transfer mechanisms for neural implants

Miziev,

Pawlak,

Howard

2024

Front. Neurosci.

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“…Power is transmitted across a medium, such as air, using the energy of fields moving through that medium. This emerging technology has been applied to consumer electronics and healthcare devices and has shown benefits for both end-user and industrial applications and applications such as EV and LRV [25,26]. There are various existing modalities of WPT, as shown in Figure 3, that enable power transfer at various application scales.…”

Section: Wireless Power Transfermentioning

confidence: 99%

“…Another safety factor that must be considered for CPT is the risk of dielectric breakdown in the transfer medium [25,50]. This occurs at a field strength of 3 kV/mm or higher in air [25].…”

Section: External Factors and Safetymentioning

confidence: 99%

A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

John Williams,

Wiseman,

Deilami

et al. 2023

Energies

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Light rail vehicles (LRVs) are increasingly in demand to sustainably meet the transport needs of growing populations in urban centres. LRVs have commonly been powered from the grid by direct-contact overhead catenary systems (OCS); however, catenary-free direct-contact systems, such as via a “hidden rail”, are popular for new installations. Wireless power transfer (WPT) is an emerging power transfer (PT) technology for e-transport with several advantages over direct contact systems, including improved aesthetics and reduced maintenance requirements; however, they are yet to be utilised in LRV systems. This paper provides a review of existing direct-contact and wireless PT technologies for LRVs, followed by an in-depth critical assessment of inductive power transfer (IPT) and capacitive power transfer (CPT) technologies for LRVs. In particular, the feasibility and advantages of CPT for powering LRVs are presented, highlighting the efficacy of CPT with respect to power transfer capability, safety, and other factors. Finally, limitations and recommendations for future works are identified.

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Wireless charging technologies for electric vehicles: Inductive, capacitive, and magnetic gear

Mohamed,

Shaier,

Metwally

et al. 2023

IET Power Electronics

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Wireless charging technologies have emerged as a promising solution for electric vehicle (EV) charging, offering convenience and automation. This paper provides a comprehensive review of the three key wireless charging technologies: inductive, capacitive, and magnetic gear. For inductive and capacitive technologies, the working principle, architectures, topologies, advantages, and challenges are discussed and analyzed considering both stationary and dynamic modes of operation. In addition, the paper introduces and analyzes the concept of mixed wireless power transfer, which combines inductive and capacitive charging systems. Additionally, the study explores the magnetic gear wireless power transfer technology, which leverages the interaction between synchronous permanent magnets to transmit power wirelessly. Various research and development efforts related to these technologies are reviewed considering academia, research labs and industry. A comparative analysis among different technologies is presented, considering key performance metrics such as power transfer, efficiency, cost, and operating frequency was presented. This review paper serves as a comprehensive resource for researchers, engineers, and industry professionals interested in wireless charging technologies for EV charging. It highlights the advancements, trade‐offs, and potential synergies among inductive, capacitive, and magnetic gear systems, paving the way for the widespread adoption of wireless charging and the development of self‐charging and self‐driving EVs.

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A Comparative Study of Capacitive Couplers in Wireless Power Transfer

Cited by 9 publications

References 7 publications

Comparative analysis of energy transfer mechanisms for neural implants

Comparative analysis of energy transfer mechanisms for neural implants

A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

Wireless charging technologies for electric vehicles: Inductive, capacitive, and magnetic gear

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