High-Frequency, Mid-range Wireless Power Transfer System using Critical Coupling Coefficient Adjustment

Kim, Minki; Choi, Joo-Hong

doi:10.1109/apec42165.2021.9487028

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…In a WPT system, a typical figure of merit is the transmission efficiency between the primary and secondary inductors. The analysis developed in [25] demonstrates that this parameter depends directly on the operating frequency, the coupling coefficient, and the physical characteristics of the inductors. The coupling coefficient is directly related to the mutual inductance ratings, which in turn influence the overall system efficiency.…”

Section: State-of-the-art Review Of Mcr-wpt Systemsmentioning

confidence: 99%

Novel Control Approach for Resonant Class-DE Inverters Applied in Wireless Power Transfer Systems

Avilés,

Tofoli,

Ribeiro

2023

Energies

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Regulating the load voltage is of major importance for ensuring high transmission efficiency in wireless power transfer (WPT) systems. In this context, this work presents a novel control strategy applied in the dc-ac converter used in the primary side of a WPT system. The performance of a class-DE resonant inverter is investigated considering that such topology presents inherent soft-switching characteristics, thus implying reduced switching losses. The controller relies on an autoregressive with exogenous output (ARX) model based on an adaptive linear neuron (ADALINE) network, which allows for determining the turn-on time of the active switches accurately while providing the system with the ability to adapt to distinct alignment conditions. The performance of the proposed controller is compared with that of a linear controller, which does not prove to be an effective solution if misalignment occurs.

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Section: State-of-the-art Review Of Mcr-wpt Systemsmentioning

confidence: 99%

Novel Control Approach for Resonant Class-DE Inverters Applied in Wireless Power Transfer Systems

Avilés,

Tofoli,

Ribeiro

2023

Energies

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“…The second is to still adopt a point-to-point dual coil structure, which improves transmission performance by increasing coil size and operating frequency. For example, references [14] and [15] use ultrahigh-frequency (UHF) to improve output power and system efficiency. However, at UHF, a series of problems, such as increased switching device loss, circuit stray parameter changes, impedance matching, and skin effect, is more prominent [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of wireless power supply system for high‐voltage transmission lines across 500‐kV insulator distance

Tan

Zhi-jun

Shen

et al. 2023

IET Power Electronics

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The energy harvesting of ultra‐high voltage transmission lines and wireless power transmission technology are effective means to solve the stable energy supply of outdoor tower equipment. However, there are inevitably technical problems such as long transmission distance, weak coupling, and parameter sensitivity. In this paper, an effective design approach for a power demand‐oriented long‐distance wireless power transmission system is proposed. With the goal of transmitting power, a system equivalent parameter model is established to address the sensitivity of design parameters for the point‐to‐point long‐distance wireless power transmission system, and the main influencing factors that lead to system power transmission failure are analyzed. To effectively address the impact of high‐sensitivity parameters, a fast‐tuning method with redundant capacitance matrix compensation is proposed, which improves the deviation problem in system parameter design, improves the efficiency of offset parameter matching, and analyzes the impact of wireless energy transmission systems on high‐voltage insulator strings. Finally, an experimental platform was constructed to achieve power transmission at a distance of not less than 5 m at a resonant frequency of 50 kHz. The transmission efficiency met the design expectations and verified the effectiveness of the analysis.

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Influence of Frequency on Transmission Performance of Multi-relay Wireless Power Supply System

Zhi-jun

Tan

Shen

et al. 2023

Lecture Notes in Electrical Engineering

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High-Frequency, Mid-range Wireless Power Transfer System using Critical Coupling Coefficient Adjustment

Cited by 5 publications

References 16 publications

Novel Control Approach for Resonant Class-DE Inverters Applied in Wireless Power Transfer Systems

Novel Control Approach for Resonant Class-DE Inverters Applied in Wireless Power Transfer Systems

Design and analysis of wireless power supply system for high‐voltage transmission lines across 500‐kV insulator distance

Influence of Frequency on Transmission Performance of Multi-relay Wireless Power Supply System

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