scholarly journals Enhancing the Robustness of the Wireless Power Transfer System to Uncertain Parameter Variations Using an Interval-Based Uncertain Optimization Method

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2032
Author(s):  
Yanting Luo ◽  
Yongmin Yang ◽  
Xisen Wen ◽  
Ming Cheng
Keyword(s):  
Optimization Model ◽  
Wireless Power Transfer ◽  
Optimization Method ◽  
Uncertain Parameter ◽  
System Structure ◽  
Power Transfer ◽  
Wireless Power ◽  
Uncertain Optimization ◽  
Wide Range ◽  
Parameter Variations

Uncertainty commonly exists in the wireless power transfer (WPT) systems for moving objects. To enhance the robustness of the WPT system to uncertain parameter variations, a modified WPT system structure and an interval-based uncertain optimization method are proposed in this paper. The modified WPT system, which includes two Q-type impedance matching networks, can switch between two different operating modes. The interval-based uncertain optimization method is used to improve the robustness of the modified WPT system: First, two interval-based objective functions (mean function and variance function) are defined to evaluate the average performance and the robustness of the system. A double-objective uncertain optimization model for the modified WPT system is built. Second, a bi-level nested optimization algorithm is proposed to find the Pareto optimal solutions of the proposed optimization model. The Pareto fronts are provided to illustrate the tradeoff between the two objectives, and the robust solutions are obtained. Experiments were carried out to verify the theoretical method. The results demonstrated that using the proposed method, the modified WPT system can achieve good robustness when the coupling coefficient, the operating frequency, the load resistance or the load reactance varies over a wide range.

scholarly journals Microwave Wireless Power Transfer System Based on a Frequency Reconfigurable Microstrip Patch Antenna Array

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 415
Author(s):  
Haiyue Wang ◽  
Lianwen Deng ◽  
Heng Luo ◽  
Junsa Du ◽  
Daohan Zhou ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Antenna Array ◽  
Patch Antenna ◽  
Wireless Power Transfer ◽  
Microstrip Patch Antenna ◽  
Market Demand ◽  
Power Transfer ◽  
Wireless Power ◽  
Microstrip Patch ◽  
Wide Range

The microwave wireless power transfer (MWPT) technology has found a variety of applications in consumer electronics, medical implants and sensor networks. Here, instead of a magnetic resonant coupling wireless power transfer (MRCWPT) system, a novel MWPT system based on a frequency reconfigurable (covering the S-band and C-band) microstrip patch antenna array is proposed for the first time. By switching the bias voltage-dependent capacitance value of the varactor diode between the larger main microstrip patch and the smaller side microstrip patch, the working frequency band of the MWPT system can be switched between the S-band and the C-band. Specifically, the operated frequencies of the antenna array vary continuously within a wide range from 3.41 to 3.96 GHz and 5.7 to 6.3 GHz. For the adjustable range of frequencies, the return loss of the antenna array is less than −15 dB at the resonant frequency. The gain of the frequency reconfigurable antenna array is above 6 dBi at different working frequencies. Simulation results verified by experimental results have shown that power transfer efficiency (PTE) of the MWPT system stays above 20% at different frequencies. Also, when the antenna array works at the resonant frequency of 3.64 GHz, the PTE of the MWPT system is 25%, 20.5%, and 10.3% at the distances of 20 mm, 40 mm, and 80 mm, respectively. The MWPT system can be used to power the receiver at different frequencies, which has great application prospects and market demand opportunities.

scholarly journals A Loosely Coupled Planar Wireless Power Transfer System Supporting Multiple Receivers

2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
Zhen Ning Low ◽  
Joaquin Jesus Casanova ◽  
Jenshan Lin
Keyword(s):  
High Efficiency ◽  
Wireless Power Transfer ◽  
Power Delivery ◽  
The Other ◽  
External Control ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Wide Range ◽  
Wireless Power Transfer System

A high-efficiency wireless power transfer system which is capable of supporting more than one receiver using class E operation for transmitter via inductive coupling has been designed and fabricated. The design approach of the system is also presented in this paper. The system requires no complex external control system but relies on its natural impedance response to achieve the desired power delivery profile across a wide range of load resistances while maintaining high efficiency to prevent any heating issues. A switch circuit is used to decouple the fully charged receiver from the system so that power delivery to the other receiver can be improved. The fabricated system at 12 V supply voltage is compact and capable of approximately 2.5 W of power delivery to each of the two receivers in a dual receiver setup and 5 W to a single receiver alone or when the other receiver is decoupled by the receiver switch. During high-power delivery state, the system efficiency is between 67.5% and 77.5%.

scholarly journals System for wireless power transfer

2021 ◽  
Vol 5 (1) ◽  
pp. 7-20
Author(s):  
I. B. Shirokov ◽  
◽  
I. V. Serdyuk ◽  
A. A. Azarov ◽  
E. I. Shirokova ◽  
...  
Keyword(s):  
Directional Coupler ◽  
Experimental Studies ◽  
Wireless Power Transfer ◽  
Unmanned Vehicles ◽  
Experimental Sample ◽  
Power Transfer ◽  
Wireless Power ◽  
Wide Range ◽  
Simulation And Experiment ◽  
Strip Lines

The issues of wireless power transfer over short distances are considered. The approach may be used for wireless charging of batteries in unmanned vehicles. It is proposed to use the technique of microstrip structures for power transfer. The microstrip structures form a directional coupler on symmetrical strip lines when approaching by front parts. The length of the interaction lines is chosen several times longer than a quarter of the wavelength. Ballast resistors are excluded from the circuit. This approach leads to small losses of power transfer when the distance between microstrip structures changes over a wide range. Modeling of the operation of the power transfer system has been carried out, an experimental sample has been made and experimental studies have been carried out. The simulation and experiment are well accorded.

scholarly journals Efficient Wireless Power Transfer via Magnetic Resonance Coupling Using Automated Impedance Matching Circuit

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2779
Author(s):  
Esraa Mousa Ali ◽  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Mohammad Soruri ◽  
Ernesto Limiti
Keyword(s):  
Magnetic Resonance ◽  
Impedance Matching ◽  
Low Frequency ◽  
Wireless Power Transfer ◽  
Consumer Electronics ◽  
Power Transfer ◽  
Wireless Power ◽  
Wide Range ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

In this paper, an automated impedance matching circuit is proposed to match the impedance of the transmit and receive resonators for optimum wireless power transfer (WPT). This is achieved using a 2D open-circuited spiral antenna with magnetic resonance coupling in the low-frequency ISM band at 13.56 MHz. The proposed WPT can be adopted for a wide range of commercial applications, from electric vehicles to consumer electronics, such as tablets and smartphones. The results confirm a power transfer efficiency between the transmit and receive resonant circuits of 92%, with this efficiency being sensitive to the degree of coupling between the coupled pair of resonators.

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