scholarly journals The design of an efficient class E-LCCL capacitive power transfer system through frequency tuning method

2021 ◽  
Vol 11 (2) ◽  
pp. 1095
Author(s):  
Khairul Kamarudin Hasan ◽  
Shakir Saat ◽  
Yusmarnita Yusop ◽  
Huzaimah Husin ◽  
Nor Diyana Md Sin
Keyword(s):  
Frequency Tuning ◽  
Supply Voltage ◽  
Alternate Current ◽  
Consumer Electronics ◽  
Power Transfer ◽  
Efficient System ◽  
Current Frequency ◽  
Zero Voltage Switching ◽  
Tuning Method ◽  
Class E

In this work, the optimum zero voltage switching (ZVS) of Class E-LCCL capacitive power transfer (CPT) was determined via frequency tuning method. Through this an efficient system can be guanranteed although there is a change in the capacitive plates distance. This study used a Class-E LCCL inverter, as it can operate at a high alternate current frequency, besides producing low switching losses and minimal power losses. Specifically, this study conducted simulations and experiments to analyse the performance of an LCCL CPT System at 1 MHz operating frequency and 24 V DC supply voltage. Using an air gap distance of 0.1 cm, the designed CPT system prototype successfully achieved an output power of 10W and an efficiency of 95.45%. This study also found that by tuning the resonant frequency of the Class E-LCCL system, the optimum ZVS can be obtained although capacitive plate distance was varied from 1-3 cm via experimental. The results of this study could benefit medical implant and portable device development, consumer electronics, and environments that involve electrical hazards.

scholarly journals Capacitive power transfer in biomedical implantable device: a review

2019 ◽  
Vol 10 (2) ◽  
pp. 935
Author(s):  
Muhammad Zaki Bin Mustapa ◽  
Shakir Saat ◽  
Yusmarnita Yusof ◽  
Muslimah Meor Shaari
Keyword(s):  
Design Method ◽  
Alternate Current ◽  
Power Transfer ◽  
System Specification ◽  
Zero Voltage Switching ◽  
Hybrid Concept ◽  
Zero Voltage ◽  
Implanted Device ◽  
Voltage Switching ◽  
Class E

<span>This paper presents the development of a new design method of capacitive power transfer (CPT) which is based on hybrid concept for Biomedical Implants. This method is able to improve various issues found in the widely used CPT system that is bipolar CPT method. Based on the ability of this purposed, the simulation of the CPT system has been designed to prove an amount of power transferred through a layer of tissue. The design used to validate the suggested model which to powering implanted device, and it was performed with 3cm square plates, which have a layer of beef with the 5mm thickness in between 2 coupling plate. Power signal was generated by Class E zero voltage switching. The Class E zero voltage switching has been designed to generating alternate current with the 1MHz frequency appropriate to the hybrid CPT system specification.</span>

scholarly journals A New Design of Capacitive Power Transfer Based on Hybrid Approach for Biomedical Implantable Device

2019 ◽  
Vol 9 (4) ◽  
pp. 2365
Author(s):  
Zaki Mustapa ◽  
Shakir Saat ◽  
Yusmarnita Yusof
Keyword(s):  
Design Method ◽  
Hybrid Approach ◽  
Alternate Current ◽  
Power Transfer ◽  
System Specification ◽  
Zero Voltage Switching ◽  
Hybrid Concept ◽  
Zero Voltage ◽  
Voltage Switching ◽  
Class E

<p>This paper presents the development of a new design method of capacitive power transfer (CPT) which is based on hybrid concept for Biomedical Implants. This method is able to improve various issues found in the widely used CPT system that is bipolar CPT method. Based on the ability of this purposed, the simulation of the CPT system has been designed to prove an amount of power transferred through a layer of tissue. The design used to validate the suggested model which to powering implanted device, and it was performed with 3cm square plates, which have a layer of beef with the 5mm thickness in between 2 coupling plate. Power signal was generated by Class E zero voltage switching. The Class E zero voltage switching has been designed to generating alternate current with the 1MHz frequency appropriate to the hybrid CPT system specification.</p><p class="Abstract"> </p>

scholarly journals Analysis and design of class E-LCCL compensation circuit topology circuit topology for capacitive power transfer system

2021 ◽  
Vol 12 (2) ◽  
pp. 1265
Author(s):  
Khairul Kamarudin Hasan ◽  
Shakir Saat ◽  
Yusmarnita Yusop ◽  
Masmaria Abdul Majid ◽  
Mohd Sufian Ramli
Keyword(s):  
Supply Voltage ◽  
Consumer Electronics ◽  
Power Transfer ◽  
Circuit Topology ◽  
Analysis And Design ◽  
Switching Losses ◽  
Plate Size ◽  
Experimental Works ◽  
System Prototype ◽  
Class E

<p class="Abstract">This research introduces the analysis and design of Class E-LCCL for capacitive power transfer (CPT) system. The CPT Class-E LCCL system is able to operate at high-frequency with decreased capacitance plate size and at reduced power losses by minimising switching losses. Additionally, the design of a CPT Class-E LCCL power amplifier is less complicated, since it is usually lighter and smaller with comparative intolerance to different circuit variants; hence, enabling the possibility of miniaturising the system. In this work, the capability of the CPT Class-E LCCL CPT system powered by 24 V DC supply voltage while operating at 1 MHz was analysed via experimental works and extensive simulation. Lastly, a CPT Class-E LCCL system prototype was built, generating 10 W output power via a 0.1 cm air gap at a near-perfect efficiency level of 96.68%. These findings could be beneficial for household apparatus, medical implants, and charging consumer electronics.</p>

scholarly journals Design of 2MHz OOK transmitter/receiver for inductive power and data transmission for biomedical implant

2019 ◽  
Vol 9 (4) ◽  
pp. 2779 ◽  
Author(s):  
Abdelali El Boutahiri ◽  
Mounir Ouremchi ◽  
Ahmed Rahali ◽  
Mustapha El Alaoui ◽  
Fouad Farah ◽  
...  
Keyword(s):  
Data Transmission ◽  
Supply Voltage ◽  
Receiver Coil ◽  
Cmos Process ◽  
Power Transfer ◽  
Biomedical Implant ◽  
Transmitter Coil ◽  
Implant System ◽  
Inductive Power ◽  
Class E

<p>In this work a 2 MHz on-off keying (OOK) transmitter/receiver for inductive power and data transmission for biomedical implant system is presented. Inductive link, driven by a Class E power amplifier (PA) is the most PA used to transfer data and power to the internal part of biomedical implant system. Proposed transmitter consists of a digital control oscillator (DCO) and a class E PA which uses OOK modulation to transfer both data and power to a biomedical implant. In proposing OOK transmitter when the transmitter sends binary value “0” the DCO and PA are turned off. With this architecture and 2 MHz carrier wave we have implemented a wireless data and power transfer link which can transmit data with data rate 1Mbps and bit error rate (BER) of 10-5. The efficiency of power transfer is 42% with a 12.7 uH transmitter coil and a 2.4 uH receiver coil and the power delivered to the load is about 104.7 mW. Proposed transmitter is designed for output power 4.1V. OOK receiver consists of an OOK demodulator, powered by rectified and regulated 5V p-p RF signal across the receiver coil. The supply voltage of proposed voltage regulator is 5 V with 9mV/V line regulation of. All circuits proposed in this paper were designed and simulated using Cadence in 0.18 um CMOS process.</p>

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

2017 ◽  
Vol 10 (12) ◽  
pp. 1588-1595 ◽  
Author(s):  
Kai Lu ◽  
Sing Kiong Nguang ◽  
Shengkai Ji ◽  
Lei Wei
Keyword(s):  
Frequency Tuning ◽  
Transfer System ◽  
Power Transfer ◽  
Class E

scholarly journals Derivation of the Resonance Mechanism for Wireless Power Transfer Using Class-E Amplifier

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 632
Author(s):  
Ching-Yao Liu ◽  
Guo-Bin Wang ◽  
Chih-Chiang Wu ◽  
Edward Chang ◽  
Stone Cheng ◽  
...  
Keyword(s):  
Wireless Power Transfer ◽  
High Electron Mobility Transistor ◽  
High Electron ◽  
Power Transfer ◽  
Wireless Power ◽  
Resonance Mechanism ◽  
Zero Voltage Switching ◽  
Gan Hemt ◽  
Resonant Capacitor ◽  
Class E

In this study, we investigated the resonance mechanism of 6.78 MHz resonant wireless power transfer (WPT) systems. The depletion mode of a gallium nitride high-electron-mobility transistor (GaN HEMT) was used to switch the states in a class-E amplifier circuit in this high frequency. The D-mode GaN HEMT without a body diode prevented current leakage from the resonant capacitor when the drain-source voltage became negative. The zero-voltage switching control was derived according to the waveform of the resonant voltage across the D-mode GaN HEMT without the use of body diode conduction. In this study, the effect of the resonant frequency and the duty cycle on the resonance mechanism was derived to achieve the highest WPT efficiency. The result shows that the power transfer efficiency (PTE) is higher than 80% in a range of 40 cm transfer distance, and the power delivered to load (PDL) is measured for different distances. It is also possible to cover different applications related to battery charging and others using the proposed design.

scholarly journals Zero Voltage Switching Condition in Class-E Inverter for Capacitive Wireless Power Transfer Applications

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 911
Author(s):  
Fabio Corti ◽  
Alberto Reatti ◽  
Ya-Hui Wu ◽  
Dariusz Czarkowski ◽  
Salvatore Musumeci
Keyword(s):  
Conversion Efficiency ◽  
Coupling Coefficient ◽  
Design Procedure ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Zero Voltage Switching ◽  
Zero Voltage ◽  
Voltage Switching ◽  
Class E

This paper presents a complete design methodology of a Class-E inverter for capacitive wireless power transfer (CWPT) applications, focusing on the capacitance coupling influence. The CWPT has been investigated in this paper, because most of the literature refers to inductive power transfer (IWPT). However, CWPT in perspective can result in lower cost and higher reliability than IWPT, because it does not need coils and related shields. The Class-E inverter has been selected, because it is a single switch inverter with a grounded MOSFET source terminal, and this leads to low costs and a simple control strategy. The presented design procedure ensures both zero voltage switching (ZVS) and zero derivative switching (ZDS) conditions at an optimum coupling coefficient, thus enabling a high transmission and conversion efficiency. The novelties of the proposed method are that the output power is boosted higher than in previous papers available in the literature, the inverter is operated at a high conversion efficiency, and the equivalent impedance of the capacitive wireless power transfer circuit to operate in resonance is exploited. The power and the efficiency have been increased by operating the inverter at 100 kHz so that turn-off losses, as well as losses in inductor and capacitors, are reduced. The closed-form expressions for all the Class-E inverter voltage and currents waveforms are derived, and this allows for the understanding of the effects of the coupling coefficient variations on ZVS and ZDS conditions. The analytical estimations are validated through several LTSpice simulations and experimental results. The converter circuit, used for the proposed analysis, has been designed and simulated, and a laboratory prototype has been experimentally tested. The experimental prototype can transfer 83.5 W at optimal capacitive coupling with operating at 100 kHz featuring 92.5% of the efficiency, confirming that theoretical and simulation results are in good agreement with the experimental tests.

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