Design and Test of a High-Power High-Efficiency Loosely Coupled Planar Wireless Power Transfer System

We proposed a modular high-voltage (HV) bias generator powered by a novel transmitter-sharing inductive coupled wireless power transmission technology, aimed to extend the generator's flexibility and configurability. To solve the problems caused through an uncertain number of modules, a dual-looped self-adaptive control method is proposed that is capable of tracking resonance frequency while maintaining a relatively stable induction voltage for each HV module. The method combines a phase-locked loop and a current feedback loop, which ensures an accurate resonance state and a relatively constant boost ratio for each module, simplifying the architecture of the boost stage and improving the total efficiency. The prototype was built and tested. The input voltage drop of each module is less than 14% if the module number varies from 3 to 10; resonance tracking is completed within 60 ms. The efficiency of the coupling structure reaches up to 95%, whereas the total efficiency approaches 73% for a rated output. Furthermore, this technology can be used in various multi-load wireless power supply applications.

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“…(20). A prototype of the HV bias generator with 10 modules was built to test the performance of the proposed method.…”

Section: A Prototype Implementationmentioning

confidence: 99%

“…However, the performance (especially transmission efficiency) of ICPT systems is strongly reliant on resonance. [17][18][19][20] Most ICPT devices are high-Q resonant coupled systems with a narrow coupling band. Even a slight detuning may result in a rapid decrease of the induction voltage and coupling efficiency.…”

Section: Introductionmentioning

confidence: 99%

Modular high-voltage bias generator powered by dual-looped self-adaptive wireless power transmission

Xie

Huang

et al. 2015

Review of Scientific Instruments

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“…The method used in these studies is based on the principle of resonant evanescent field (either near-field or nonradiative field) coupling, which allows the energy to be coupled efficiently between two resonant objects, i.e., between the transmitting and receiving coils 6 of the WPT system. Additionally, the coupling mechanism is mediated through overlapping of the evanescent fields 4 .…”

Section: Introductionmentioning

confidence: 99%

“…It is therefore necessary to clarify how the energy is transferred and how the superposition of the evanescent fields mediates the coupling mechanism. While the WPT mechanism has been studied extensively in previous works based on coupled-mode theory 3, 4, 7–9 and equivalent circuit theory 6, 10–12 , little attention has been paid to the issue of superposition of the evanescent fields, which is related to the essence of the energy transmission process.…”

Section: Introductionmentioning

confidence: 99%

Poynting vector analysis for wireless power transfer between magnetically coupled coils with different loads

Guo

Hou

et al. 2017

Sci Rep

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Wireless power transfer is a nonradiative type of transmission that is performed in the near-field region. In this region, the electromagnetic fields that are produced by both the transmitting and receiving coils are evanescent fields, which should not transmit energy. This then raises the question of how the energy can be transferred. Here we describe a theoretical study of the two evanescent field distributions at different terminal loads. It is shown that the essential principle of wireless energy transfer is the superposition of the two evanescent fields, and the resulting superimposed field is mediated through the terminal load. If the terminal load is either capacitive or inductive, then the superimposed field cannot transfer the energy because its Poynting vector is zero; in contrast, if the load is resistive, energy can then be conveyed from the transmitting coil to the receiving coil. The simulation results for the magnetic field distributions and the time-domain current waveforms agree very well with the results of the theoretical analysis. This work thus provides a comprehensive understanding of the energy transfer mechanism involved in the magnetic resonant coupling system.

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“…Inductive Power Transfer (IPT) without a magnetic core was first proposed by Nikola Tesla to supply wireless mains power over long distance around 100 years ago [4]. Since afterward, low-power, closely-coupled wireless charging methods have been used to power medical implants [5], even as the wireless powering of portable devices through charging mats or pads is now existing through commercial products [6].…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of wireless stationary charging system for hybrid electric vehicle using inductive power pad in parking garage

Amin

Roy

2014

The 8th International Conference on Software, Knowledge, Information Management and Applications (SKIMA 2014)

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Carbon emission minimization is one of big challenge in this century. For this purpose, in public transport point of view, the integration of electric vehicle is growing fast. Now the intention of this work is to design wireless charger with the aim of charging vehicle battery. The charger contains with a transmitter antenna which is assembled in parking garage surface in a particular area and a receiver antenna which is attached with vehicle bottom side with battery is to be charged. Here inductive power transfer technique is applied to transfer energy from transmitter to receiver through the air-gap in an optimum distance for achieving high efficiency of transfer link. MATLAB/SIMULINK is used to simulate the power pad of transmitter and receiver with proper calculation of inductance in each pad and mutual inductance between pads. The high frequency signal is thrown for traveling through the air-gap due to contain high signal strength. The received signal is further rectified to DC for restoring it into battery. This paper focuses the design of transmitter and receiver with proper investigation of circuit parameter of transmitter antenna and receiver antenna for electric vehicle. Finally the charger efficiency is determined with MATLAB/SIMULINK.

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Design and Test of a High-Power High-Efficiency Loosely Coupled Planar Wireless Power Transfer System

Cited by 459 publications

References 17 publications

Modular high-voltage bias generator powered by dual-looped self-adaptive wireless power transmission

Modular high-voltage bias generator powered by dual-looped self-adaptive wireless power transmission

Poynting vector analysis for wireless power transfer between magnetically coupled coils with different loads

Design and simulation of wireless stationary charging system for hybrid electric vehicle using inductive power pad in parking garage

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