Capacitive power transfer with impedance matching network

Yusop, Yusmarnita; Saat, Shakir; Ghani, Z. A.; Husin, Huzaimah; Nguang, Sing Kiong

doi:10.1109/cspa.2016.7515817

Cited by 17 publications

(18 citation statements)

References 10 publications

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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]. The chosen circuit composition of impedance matching network is π1b circuit as shown in the red dotted line of Figure 5.…”

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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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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“…Impedance matching of work in [16] used to maximise the amount of power extracted in a power conditioning circuit. In another work [17], by using impedance matching, the particular work achieved efficiency as high as 95.44% while still able to produce a stable sinusoidal signal to drive the capacitive coupling based on flat rectangular copper plates, and operated at 1MHz. The contribution of this paper can be brief as follows: a.…”

Section: Figure 1 Basic Cpt Systemmentioning

confidence: 99%

“…Figure 4 (a) and (c) focus on the reactance of the capacitor C, while (b) and (d) are concerning on the reactance of the inductor L. In [17], authors utilized as their matching circuit to enhance output power of the existing capacitive power transfer system. As a result, when powered by 12V dc, the Class-E resonant inverter with matching network efficiency yields 95.44%.…”

Section: Impedance Matching Networkmentioning

confidence: 99%

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

Rahman¹,

Saat²,

Yusop³

et al. 2017

IJPEDS

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This paper presents the design and analysis of a relatively new wireless power transfer technique using capacitive coupling, named Capacitive power transfer (CPT). In general, CPT system has been introduced as an attractive alternative to the former inductive coupling method. This is because CPT uses lesser number of components, simpler topology, enhanced EMI performance and better strength to surrounding metallic elements. In this work, aluminium sheet is used as a capacitive coupling at transmitter and receiver side. Moreover, a Class-E resonant inverter together with π1a impedance matching network has been proposed because of its ability to perform the dc-to-ac inversion well. It helps the CPT system to achieve maximum power transfer. The CPT system is designed and simulated by using MATLAB/Simulink software. The validity of the proposed concept is then verified by conducting a laboratory experimental of CPT system. The proposed system able to generate a 9.5W output power through a combined interface capacitance of 2.44nF, at an operating frequency of 1MHz, with 95.10% efficiency. The proposed CPT system with impedance matching network also allows load variation in the range of 20% from its nominal value while maintaining the efficiency over 90%. Keyword:Aluminum sheet Capacitive power transfer MATLAB simulink Wireless power transfer impedance matching

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“…The main advantage of the power amplifier based topology is that the transfer distance can be significantly increased [46][47][48][49]. There are usually resonances in a power amplifier, and the switching frequency can increase to a very high value, which helps reduce the required inductances and capacitances.…”

Section: Power Amplifier Based Topologymentioning

confidence: 99%

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

2017

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Capacitive power transfer (CPT) technology is an effective and important alternative to the conventional inductive power transfer (IPT). It utilizes high-frequency electric fields to transfer electric power, which has three distinguishing advantages: negligible eddy-current loss, relatively low cost and weight, and excellent misalignment performance. In recent years, the power level and efficiency of CPT systems has been significantly improved and has reached the power level suitable for electric vehicle charging applications. This paper reviews the latest developments in CPT technology, focusing on two key technologies: the compensation circuit topology and the capacitive coupler structure. The comparison with the IPT system and some critical issues in practical applications are also discussed. Based on these analyses, the future research direction can be developed and the applications of the CPT technology can be promoted.

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Capacitive power transfer with impedance matching network

Cited by 17 publications

References 10 publications

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

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

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

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