Wireless Power Transmission Using a PCB Antenna and a MHz Frequency Inverter

2014 ◽  
Vol 931-932 ◽  
pp. 893-898
Author(s):  
Natthaphon Phokhaphan ◽  
Krit Choeisai
Keyword(s):  
Resonant Frequency ◽  
Printed Circuit Board ◽  
Power Transmission ◽  
Design Procedure ◽  
Circuit Board ◽  
Total Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Vertical Alignment ◽  
Frequency Inverter

This paper proposes a wireless power transmission system which used a printed circuit board operating as an antenna for both transmitter and receiver. The proposed antenna is driven by a high frequency full-bridge inverter which operates at self-resonant frequency of the antenna. Design procedure for the proposed antenna is also described. Results obtained from experimental test-rig confirm that the fabricated antenna provides self-resonant frequency at 2 MHz as design. The efficiency of the antenna can achieve the highest when the distance between transmitter and receiver is 40 mm in vertical alignment. The maximum total efficiency of proposed system is approximately 56.7 % at the distance between transmitter and receiver of 80 mm.

Compensating Resonant Frequency via Adjusting Adjustable Coil Automatically

2019 ◽  
Vol 12 (5) ◽  
pp. 432-438
Author(s):  
Jin Xu ◽  
Yuting Zhao
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Reference Value ◽  
Transmission Efficiency ◽  
Theoretical Research ◽  
Future Research ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Resonant Coupling ◽  
Transmission Distance

Background: Detuning is the main problem that affects the efficiency and transmission distance of the resonant coupling Wireless Power Transmission (WPT). The distance of load and the offset of the load position could cause serious detuning. Methods: This paper presents an adjustable coil in which inductance can be adjusted. Then a model of WPT was established that could compensate resonant frequency automatically using the adjustable coil. Next, the relationship between the primary resonant frequency and the transmission efficiency is analyzed from the circuit. The analysis proved that the design of the adjustable coil could improve the transmission efficiency of the WPT system. Finally, a prototype of WPT system was built. Results: The experimental results showed that WPT system with adjustable coil can improve the transmission efficiency which proves the theoretical research. At the same time, it has essential reference value for the future research of WPT. Conclusion: In this paper, aiming at the system detuning caused by some other factors, such as the position shift of the load during the wireless power transmission, an adjustable coil is proposed.

Efficient Rectenna Circuit for Wireless Power Transmission

2020 ◽  
pp. 57-65
Author(s):  
Anurag Saxena ◽  
Paras Raizada ◽  
Lok Prakash Gautam ◽  
Bharat Bhushan Khare
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Numerical Data ◽  
Electrical Energy ◽  
Single Band ◽  
Impedance Bandwidth ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transfer Efficiency

Wireless power transmission is the transmission of electrical energy without using any conductor or wire. It is useful to transfer electrical energy to those places where it is hard to transmit energy using conventional wires. In this chapter, the authors designed and implemented a wireless power transfer system using the basics of radio frequency energy harvesting. Numerical data are presented for power transfer efficiency of rectenna. From the simulated results, it is clear that the anticipated antenna has single band having resonant frequency 2.1 GHz. The anticipated antenna has impedance bandwidth of 62.29% for single band. The rectenna has maximum efficiency of 60% at 2.1 GHz. The maximum voltage obtained by DC-DC converter is 4V at resonant frequency.

scholarly journals An Adaptive Current Limiting Controller for a Wireless Power Transmission System Energized by a PV Generator

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1648
Author(s):  
Ali Jafer Mahdi ◽  
Shah Fahad ◽  
Wenhu Tang
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Renewable Energy Sources ◽  
Transmission System ◽  
Consumer Electronics ◽  
Variable Load ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Low Efficiency

The use of a wireless power transmission system (WPTS) in modern applications, such as consumer electronics, renewable energy sources (RESs) and electric vehicles (EVs), can significantly increase the safety and convenience of the power supply. However, low efficiency is a major hurdle to the use of a WPTS in these applications. In this article, an adaptive virtual impedance controller (AVIC) is presented to enhance the wireless power transfer (WPT) efficiency of a photovoltaic generator (PVG) to the load. In the proposed controller, a unique method is employed to adaptively estimate the coefficient of coupling and resonant frequency of the WPTS coils as a function of the distance between the coils. Moreover, a modified incremental conductance (IC) based maximum power tracking (MIC-MPPT) technique is presented to operate the PVG at MPPT mode. The proposed MIC-MPPT is tested via a hardware prototype and the controller validation is carried out in the MATLAB/SIMULINK environment under various uncertainties, such as intermittent irradiance, variable load, and the distance between transmitter (Tx) and receiver (Rx) coils. Finally, a comparative analysis between the proposed controller and the conventional non-adaptive and adaptive resonant frequency controller is presented which confirms the superiority of the proposed controller.

scholarly journals Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1348
Author(s):  
Yingqin Zeng ◽  
Conghui Lu ◽  
Cancan Rong ◽  
Xiong Tao ◽  
Xiaobo Liu ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Wireless Power Transfer ◽  
Circuit Board ◽  
Power Transfer ◽  
Wireless Power ◽  
Analysis And Design ◽  
Transfer Distance ◽  
Power Transfer Efficiency

In a wireless power transfer (WPT) system, the power transfer efficiency (PTE) decreases sharply with the increase in transfer distance. Metamaterials (MMs) have shown great potential to enhance PTE in mid-range WPT systems. In this paper, we propose two MM slabs of a 3 × 3 array to enhance the magnetic coupling. The MM unit cell was designed by using square spiral patterns on a thin printed circuit board (PCB). Moreover, the asymmetric four-coil WPT system was designed and built based on the practical application scenario of wireless charging for unmanned devices. The simulation and experimental results show that two MM slabs can enhance power transmission capability better than one MM slab. By optimizing the position and spacing of two MM slabs, the PTE was significantly improved at a mid-range distance. The measured PTEs of a system with two MM slabs can reach 72.05%, 64.33% and 49.63% at transfer distances of 80, 100 and 120 cm. When the transfer distance is 100 cm, the PTE of a system with MMs is 33.83% higher than that without MMs. Furthermore, the receiving and load coils were integrated, and the effect of coil offset on PTE was studied.

scholarly journals Rectenna circuit at 6.13 GHz to operate the sensor devices

2018 ◽  
Vol 7 (3.3) ◽  
pp. 644 ◽  
Author(s):  
Anurag Saxena ◽  
V K. Singh ◽  
Mohini . ◽  
Sonam Bhardwaj ◽  
Gyoo Soo Chae ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Power Transmission ◽  
Electrical Energy ◽  
Textile Material ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Design Purpose ◽  
Wearable Antenna ◽  
Sensor Devices

There are various types of transmission through wire and wireless but wireless power transmission is the transmission of electrical energy without using any conductor or lead. At resonant frequency, 6.13 GHz wearable antenna is fabricated and tested. For making wearable an-tenna, textile material (substrate) i.e. Jeans is used for the simulation having dielectric constant 1.7. At the places where it is hard to transmit energy, wearable antenna is best suitable for this purpose, but before doing this RF is converted into DC with the help of the rectifier. Vari-ous types of graph in this paper are shown in the comparison between the power and efficiency. For simulating and design purpose of an-tenna CST, software is used. Implementation of antenna with rectifier circuit is known as rectenna and the rectenna circuit can be designed in Pspice software.  

scholarly journals Effects of Electro-Magnetic Properties of Obstacles in Magnetic Resonant Wireless Power Transfer

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7469
Author(s):  
Ho-Yeong Lee ◽  
Sang-Hyeon Im ◽  
Gwan-Soo Park
Keyword(s):  
Magnetic Properties ◽  
Resonant Frequency ◽  
Power Transmission ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Long Distance ◽  
Element Analysis ◽  
Specific Frequency ◽  
Electro Magnetic

Magnetic resonant wireless power transmission (MRWPT) is a method of transmitting power over a long distance at a specific frequency. Because this system uses an alternating magnetic field, if an object with electrical/magnetic properties is placed between the transmit and receive coils, this will have a significant impact on the power transfer. In this paper, the effect of an obstacle located between two coils on the resonance frequency and transmission power is analyzed. A wireless power transmission system with a resonant frequency of 20 kHz was designed, and ferrite, aluminum, and carbon steel were selected as obstacles with permeability or conductivity. After simulating the system with finite element analysis (FEA) with these obstacles, the results were verified through actual experiments. The results show that the permeability of the obstacle decreases the resonant frequency, and the conductivity increases the resonant frequency and greatly reduces the output power. In addition, part of reduced output could be recovered by adjusting the frequency.

Analysis of Wireless Energy Transfer System Using Magnetic Resonant Coupling

2012 ◽  
Vol 591-593 ◽  
pp. 1164-1167
Author(s):  
Wei Xin Li ◽  
He Zhang
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Transmission System ◽  
Simulation Software ◽  
Maximum Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Transmission Characteristics ◽  
Resonant Coupling ◽  
Power Transmission System

In order to research the relationship between coupling distance and transmission efficiency, study on the transmission characteristics of magnetic resonant coupling for wireless power transmission system, simulation model of wireless power transmission system via magnetic resonance coupling were established based on the theory of two ports network analysis method. The frequency expression of maximum efficiency and the resonant frequency splitting phenomenon condition of a contact-less power transmission system were derived. In a weak coupling at resonance, magnetic resonant coupling can transfer energy with high efficiency. The resonant frequency changes from two to one depending on the critical condition. Until a certain distance, maximum efficiencies are not got. The transmission characteristics of this system were researched by simulation software and experiments. The results show that the transmission characteristics are consistent with theoretical analysis and simulation.

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