The Research of Wireless Low Power Transmission System Based on Magnetic Resonant Coupling

2012 ◽  
Vol 468-471 ◽  
pp. 2854-2858
Author(s):  
Wei Xin Li ◽  
He Zhang
Keyword(s):  
Power Transmission ◽  
Transmission System ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Theoretical Derivation ◽  
Strongly Coupled ◽  
Resonant Coupling ◽  
Transmission Parameters ◽  
Power Transmission System ◽  
Low Efficiency

In order to study on the relationship between transmission parameters and transmission performance of wireless power transmission system based on the basic principles of magnetic resonant coupling, because of magnetic induction coupling with low-efficiency and short-distance, the basic circuit model of wireless power transmission system via Strongly Coupled Magnetic Resonances was analyzed. The expression of the parameters such as relationships between efficiency, frequency and distance was derived. Further more, the experiment of wireless power transmission system was designed based on the results of the analysis. At last, the results of experiment show that the theoretical derivation is correct and all the system is affected by the transmission parameters.

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.

Wireless Power and Information Synchronous Transmission Technology Based on Magnetic Resonance

2013 ◽  
Vol 300-301 ◽  
pp. 615-620
Author(s):  
Wei Xin Li ◽  
He Zhang ◽  
Chang Sheng Li
Keyword(s):  
Power Transmission ◽  
Transmission System ◽  
Maximum Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Transmission Characteristics ◽  
Resonant Coupling ◽  
Power Transmission System ◽  
Simulation And Experiment ◽  
Novel Method

In order to solve the problem that electromagnetic induction widely used now is just suited to short distance transmission, and study on the transmission characteristics of wireless power transmission system based on magnetic resonant coupling, a novel method that the two separate-coupling coils achieve wireless power and information synchronous transmission is proposed. The basic theory of wireless power transmission and information system is introduced. The condition that resonant frequency splitting phenomenon is produced of a contact-less power transmission system has been deduced, and it depend on the length of distance between the two coils. The principle prototype of transmission system is designed, and transmission characteristics of the system are analyzed by simulation and experiment. Based on circuit formulation, maximum efficiency is found to exist. The results show that the method of wireless power and information synchronous transmission system is in agreement with theoretical analysis.

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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