Optimisation design for series–series dynamic WPT system maintaining stable transfer power

Wang, Sheng-Ming; Chen, Junfeng; Hu, Zhenzhong; Chen, Rong; Liu, Minghai

doi:10.1049/iet-pel.2016.0839

Cited by 69 publications

(46 citation statements)

References 32 publications

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“…As shown in Figure 1, the basic principle of WPT is to achieve the non-contact transmission of power through the mutual inductance between two coils. The transmission characteristics are affected not only by the transmitter parameters but also by the receiver structures [22][23][24]. In order to simplify the analysis process, the circuit equivalent of WPT is shown in Figure 2.…”

Section: Existing Concepts Relevant To the Proposed Methodsmentioning

confidence: 99%

Passive Wireless Measurement System Based on Wireless Power Transfer Technology

Zheng

Dai

et al. 2019

Electronics

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This paper presents a passive wireless measurement system based on wireless power transfer (WPT) technology. It does not require separate information and power transmission circuits. The data receiver only needs to send a short signal to the data collector through WPT, and then the information of the measured environment can be obtained by analyzing the feedback signal from the data collector. Three concepts are included in this system, namely (1) the constant oscillation period of oscillation attenuation waveforms; (2) the characteristics of inductive coupling WPT; and (3) the relationship between sensitive resistances and environmental parameters. It is very suitable for measuring the parameters in an internal or closed space. The data collector is small in size and simple in structure, and no power is needed. It has stable performance after implantation and can be used permanently. Results obtained from simulations and experiments are included. They verify the measurement process and measurement results meet the requirements of passive wireless measurement, and the measurement error is less than 1.5%.

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Section: Existing Concepts Relevant To the Proposed Methodsmentioning

confidence: 99%

Passive Wireless Measurement System Based on Wireless Power Transfer Technology

Zheng

Dai

et al. 2019

Electronics

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“…When integrating these modules together, it is necessary to decrease the power reflection as much as possible caused by impedance mismatch between the modules for the maximal system efficiency. 8 A straightforward approach for the problem is to use impedance matching. In Reference 9, an additional repeater coil was designed to improve the impedance matching between the WPT coils and the circuits, thus resulting in the increase of the whole system volume.…”

Section: Introductionmentioning

confidence: 99%

A wireless power transfer system based on impedance matching network

Yang

Shi

Wen

et al. 2020

Int J RF Microw Comput Aided Eng

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In this paper, we design a wireless power transfer (WPT) system based on the impedance matching network to achieve highly efficient wireless power transmission from a power source of 220 V/50 Hz to a 50 kHz transmission power to a 25 kHz alternating current (AC) output power. The proposed WPT system is composed of primary rectifier-filter module, DC-DC buck module, primary inverter module, primary impedance matching module, WPT module, secondary impedance matching module, secondary rectifier-filter module, and secondary inverter module. With the used of the secondary impedance matching module, the WPT module with the optimal transfer efficiency can be achieved. By introducing the primary matching module, the efficiencies of the primary inverter module and the DC-DC buck module are improved and meanwhile the equivalent input impedance of the WPT module is increased to suppress the excessive primary-side current caused by the removal of the receiving coil. The proposed prototype system has been fabricated, and the measurement results demonstrate that the system efficiency of 57% can be obtained with a distance of 30 mm at the 42 W input power.

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“…The most important issues of a WPT system are the power transfer efficiency and the power transfer distance. Many attempts such as coil structure optimization [13][14][15], maximum frequency tracking [16][17][18][19], and the multi-coils system [20][21][22] have been developed in order to improve system performance. However, before large-scale practical application, safety concerns also need to be clarified and addressed [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Vertical Metal Plate on Transfer Efficiency of the Wireless Power Transfer System

et al. 2019

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Power transfer efficiency is an important issue in wireless power transfer (WPT). In actual applications, the WPT system may be exposed to a complex electromagnetic environment. The metal which is inevitably or accidentally close to the system will impact the power transfer efficiency. Most previous research has aimed at the effect of the metallic sheet paralleled to the resonant coil. This paper focuses on the effect of the metallic plate perpendicular to the resonant coils. Firstly, based on the theoretical analysis, a simulation model is setup using COMSOL Multiphysics. The efficiencies of the double-coils magnetic resonant WPT system with the presence of the parallel and vertical aluminum plate are studied comparatively. Efficiency improvement is observed with the vertical plate while the reduction appeared with the presence of the parallel plate. The vertical metallic plate has shown a magnetic field shielding effect according to the magnetic field distribution. It can reduce the radial magnetic field and enhance the axial magnetic field. Then, the effects of the position and size of the vertical plate are studied. It is found that the transfer efficiency has a preferable improvement when the vertical aluminum plate with a larger size is placed between the resonant coils and near outer edge of the windings. Finally, the experiment is carried out to verify the effect of the vertical aluminum plate on the WPT system.

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Optimisation design for series–series dynamic WPT system maintaining stable transfer power

Cited by 69 publications

References 32 publications

Passive Wireless Measurement System Based on Wireless Power Transfer Technology

Passive Wireless Measurement System Based on Wireless Power Transfer Technology

A wireless power transfer system based on impedance matching network

Effect of Vertical Metal Plate on Transfer Efficiency of the Wireless Power Transfer System

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