Mobile phone mid-range wireless charger development via coupled magnetic resonance

Yasar, Ismail; Shi, Lei; Bai, Hua; Liu, Yang; Wang, Xuntuo

doi:10.1109/itec.2016.7520217

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…In various studies conducted on wireless power supply for portable electronic devices, issues such as transmission efficiency and electromagnetic safety must be focused on. Therefore, many scholars have conducted extensive research on aspects such as improving energy supply efficiency and optimizing the safety and design of the coil structure [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Research on Resonant Wireless Energy Supply Double-Layer Receiving Coupler for Portable Electronic Equipment

Chen,

Qian,

Yan

2022

PIER C

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In order to reduce the electromagnetic interference on the receiving side of electronic equipment in the process of wireless energy supply, a magnetic coupling resonant wireless energy supply system for portable electronic equipment with double-layer PCB coil structure is designed under 100 kHz. Firstly, the circuit principle is analyzed, and the LCC-P compensation circuit model is established. Then, the coil model is constructed. The effects of turns and wire diameter on the coil self inductance and coupling coefficient are analyzed. The best parameters are selected, and the magnetic field distributions of the three coil structures at different distances are simulated and studied. Finally, an experimental platform is built to study the transmission efficiencies of different receiving coils with different spacings. The magnetic field intensitiwa at different positions are compared to further verify the performance of double-layer coils. The experimental results show that when the coil spacing is in the range of 4-16 mm, the efficiency of the WPT system can reach 40%-71%. The strength of the central magnetic field of the coil is increased by 16%, and the external magnetic field is reduced by more than 20%. The temperature rise of one hour charging is 5.34 • , which is only 0.78 • higher than that of other coils.

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Section: Introductionmentioning

confidence: 99%

Research on Resonant Wireless Energy Supply Double-Layer Receiving Coupler for Portable Electronic Equipment

Chen,

Qian,

Yan

2022

PIER C

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“…T HE interest for wireless power transfer (WPT) using magnetic coupling in different common applications has been booming since the Massachusetts Institute of Technology (MIT) developed a highly efficient WPT resonant system in 2007 [1]. These applications include wireless power transmission systems for wireless charging of cellular phones [2][3][4][5], electric vehicles [6][7][8][9][10][11][12], and medical equipment [13][14][15][16][17][18][19][20]. For wireless power transmission resonant systems, the ability to measure or predict the magnetic coupling between the coils of the system is fundamental, and having expressions to compute the magnetic field generated by the coils is very useful.…”

Section: Introductionmentioning

confidence: 99%

Analytical Expressions for the Magnetic Field Generated by a Circular Arc Filament Carrying a Direct Current

Gonzalez

Cárdenas

2021

IEEE Access

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“…At present, loosely-coupled (LC) wireless chargers are employed to support the simultaneous charging of a multiplicity of devices, such as laptops, tablets, and mobile phones in multiple wireless charging pads (power transmitting units: PTUs) and charging devices (power receiving units: PRUs) [1][2][3]. In densely located LC wireless charger environments, cross-connection errors can occur when PTUs and PRUs operate simultaneously in the same wireless communication range.…”

Section: Introductionmentioning

confidence: 99%

An Improved Cross-Connection Abatement Algorithm with RSSI Using In-Band Magnetic Field Control in Densely Located LC Wireless Charger Environments

Kim

Cho

Kim

2018

Adv. sci. technol. eng. syst. j.

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In densely located loosely coupled wireless charger environments, cross-connection errors can occur when wireless chargers operate at the same time within the same wireless communication range. In this work, an effective algorithm is proposed to prevent cross-connection error. The algorithm based on the cross-connection abatement technique with the received signal strength indicator of out-band BLE communication has improved using an in-band magnetic field signal controlled by a pulse-width-modulation-like waveform. The experimental results obtained from a proper test set in a RF shield room verify that the wireless charging system using the proposed algorithm provides wireless charging services without cross-connection errors.

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Mobile phone mid-range wireless charger development via coupled magnetic resonance

Cited by 10 publications

References 33 publications

Research on Resonant Wireless Energy Supply Double-Layer Receiving Coupler for Portable Electronic Equipment

Research on Resonant Wireless Energy Supply Double-Layer Receiving Coupler for Portable Electronic Equipment

Analytical Expressions for the Magnetic Field Generated by a Circular Arc Filament Carrying a Direct Current

An Improved Cross-Connection Abatement Algorithm with RSSI Using In-Band Magnetic Field Control in Densely Located LC Wireless Charger Environments

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