Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Rahman, Fariha; Saat, Shakir; Yusop, Yusmarnita; Husin, Huzaimah; Aziz, Y.

doi:10.11591/ijpeds.v8.i3.pp1260-1273

Cited by 7 publications

(9 citation statements)

References 18 publications

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“…3 (a). Saat et al carry out analysis and design studies on the side of CPT technology, specifically low power applications [136][137][138][139][140][141]. Resulting from one active switch and low coupling capacitance, class E inverter is typically preferred in low power CPT applications [142][143][144].…”

Section: ) Invertersmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from µW to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from µm range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.INDEX TERMS Capacitive power transfer, capacitive coupling, wireless power transfer.MEHMET ZAHID EREL was born in Sakarya, Turkey. He received the B.S. degree in electrical engineering from the Yildiz Technical University, Istanbul, Turkey, in 2013, and the M.S. degree in electronics and communication engineering from the Ankara Yildirim Beyazit University, Ankara, Turkey, in 2016. He is currently pursuing the Ph.D. degree with the department of electrical and electronics engineering,

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Section: ) Invertersmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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“…In order to improve the maximum power transfer between the source and its load as stated by the author in [14], the implementation of an impedance matching in the Class E circuit has been proposed in this work. The motivation behind the introduction of impedance matching system is to change over the load resistance or impedance to the impedance required to deliver the desired output power, Po at the specified supply voltage, Vdc and the operating frequency, f [15].…”

Section: B the Implementation Of Impedance Matching In Class E Circumentioning

confidence: 99%

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

2019

IJRTE

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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%.

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“…The classification of WPT is divided into two categories that are near-field WPT and far-field WPT. Moreover, the near-field technique can be divided into three sections namely as inductive power transfer (IPT), acoustic power transfer (APT) and capacitive power transfer (CPT) [3]. In near-field power transfer, the IPT uses a coil that will produce the magnetic field to transfer power, see Figure 1(a), while CPT applies capacitive plate that will produce an electric field to transfer power, see Figure 1(b).…”

Section: Introductionmentioning

confidence: 99%

“…Since capacitive power transfer used the electric field coupling, it has been the key part for the new improved method to achieve non-contact power transfer and gives greater effects onto the frequency, output power, and power efficiency of the system. This method can be the solution for drawback of the IPT system [3]- [6]. The CPT system is very benefial in the rotary applications, such as robotic arm in automation industry to allow the actuator to achieve 360 degrees of free rotation.…”

Section: Introductionmentioning

confidence: 99%

The design of auto-tuning capacitive power transfer for rotary applications using phased-locked-loop

Nabila¹,

Saat²,

Yusop³

et al. 2019

IJPEDS

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<span>Wireless power transfer (WPT), through the transmission of contactless energy, is not only being used for charging batteries in smartphones, but it is also being increasingly used in the field of industrial applications. The capacitive based approach is utilized in this paper because of its ability to transmit power in a metal surrounding environment where the inductive-based approach failed to perform. This work focuses on the coupling study of a rotary CPT application where the power supply is stationary while the load rotates and therefore allows the load to rotate 360<sup>o</sup> free rotation. The Class E MOSFET power inverter is used here due to its ability to achieve high efficiency compared to other class of converters at high frequency. The prototype of the CPT for rotary application has also been successfully developed with disk plate thickness of 1mm-2mm. Overall, the developed CPT system for rotary application is able to deliver 5.5Watt with 83.33% efficiency. To enhance the power efficiency and ZVS conditions, a self-tuning circuit using phased-locked-loop has been proposed in this paper. The efficiency of the developed system with self-tuning circuit is increased to 97.%.</span>

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Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Cited by 7 publications

References 18 publications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

The design of auto-tuning capacitive power transfer for rotary applications using phased-locked-loop

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