Development of the Optimization Framework for Low-Power Wireless Power Transfer Systems

Lee, Seung Beop; Ahn, Seungyoung; Jang, In Gwun

doi:10.1109/tmtt.2015.2398414

Cited by 17 publications

(7 citation statements)

References 35 publications

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“…However, they were based on the engineering intuition and knowledge, which were not systematic and efficient for designing the complicated WPT systems. As an alternative, design optimization was recently implemented to determine the optimized shape with multiple design variables and constraints [2], [3]. The results demonstrated the potential of design optimization for the WPT systems.…”

Section: Introductionmentioning

confidence: 98%

Layout optimization of the secondary coils for wireless power transfer systems

Lee

Jang

2015

2015 IEEE Wireless Power Transfer Conference (WPTC)

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Due to the complexity of wireless power transfer systems, little literature to date has addressed the development of systematic and efficient design framework for determining the optimal layout of coils. In this paper, introducing the concepts of fixed grid-based coil representation and effective turns, a novel layout optimization is proposed to determine the optimal layout of the secondary coils when the primary coils are given. Using the proposed method, the secondary-coil layouts are successfully determined to maximize the induced voltages while satisfying mass constraints. The optimized layouts are then validated through the experiments under the same conditions. Index Terms-Wireless power transfer, electromagnetic field, induced voltage, layout optimization, coil design.

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Section: Introductionmentioning

confidence: 98%

Layout optimization of the secondary coils for wireless power transfer systems

Lee

Jang

2015

2015 IEEE Wireless Power Transfer Conference (WPTC)

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“…Recently, as more efficient coil design methods were created, the design optimizationbased coil design methods for S-S WPT systems were developed, which compensated for the drawbacks of the conventional methods. They are largely categorized into the shape optimization method [22,23], which can optimize the size and shape of the coils, and layout optimization [24][25][26], which can optimize the layout as well as the size and shape of the coil. The shape optimization was used to determine the optimized coil and ferrite of the transmitter and receiver for S-S WPT systems with no load to minimize the thickness of the receiver coil while satisfying all constraints (i.e., induced voltage and electromagnetic field intensity) [22].…”

Section: Introductionmentioning

confidence: 99%

Transmitter Module Optimization for Wireless Power Transfer Systems with Single Transmitter to Multiple Receivers

Lee

2021

Mathematics

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Most of the coil designs for wireless power transfer (WPT) systems have been developed based on the “single transmitter to a single receiver (S-S)” WPT systems by the empirical design approaches, partial domain searches, and shape optimization methods. Recently, the layout optimizations of the receiver coil for S-S WPT systems have been developed using gradient-based optimization, fixed-grid (FG) representation, and smooth boundary (SB) representation. In this paper, the new design optimization of the transmitter module for the “single transmitter to multiple receivers (S-M)” WPT system with the resonance optimization for the S-M WPT system is proposed to extremize the total power transfer efficiency while satisfying the load voltage (i.e., rated power) required by each receiver and the total mass used for the transmitter coil. The proposed method was applied to an application model (e.g., S-M WPT systems with two receiver modules). Using the sensitivity of design variables with respect to the objective function (i.e., total power transfer efficiency) and constraint functions (i.e., load voltage of each receiver module and transmitter coil mass) at each iteration of the optimization process, the proposed method determines the optimal transmitter module that can maximize the total power transfer efficiency while several constraints are satisfied. Finally, the optimized transmitter module for the S-M WPT system was demonstrated through comparison with experiments under the same conditions as the simulation environment.

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“…Wireless charging technologies, as an attractive alternative to cabled charging, are attracting widespread interest in the field of consumer electronics, medical implants and electric vehicles [1][2][3][4], due to their convenient and safe characteristics [5][6][7]. There are two kinds of power supply system in wireless charging system (WCS): alternating current fed (AC-fed) and direct current fed (DC-fed) system.…”

Section: Introductionmentioning

confidence: 99%

Mitigation Conducted Emission Strategy Based on Transfer Function from a DC-Fed Wireless Charging System for Electric Vehicles

et al. 2018

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The large dv/dt and di/dt outputs of power devices in wireless charging system (WCS) in electric vehicles (EVs) always introduce conducted electromagnetic interference (EMI) emissions. This paper proposes a mitigation conducted emission strategy based on transfer function from a direct current fed (DC-fed) WCS for EVs. A complete test for the DC-fed WCS is set up to measure the conducted emission of DC power cables in a frequency range of 150 kHz-108 MHz. An equivalent circuit with high-frequency parasitic parameters for WCS for EV is built based on measurement results to obtain the characteristics of conducted emission from WCS. The transfer functions of differential mode (DM) interference and common mode (CM) interference were established. A judgment method of using transfer functions to determine the dominated interference mode responsible for EMI is proposed. From the comparison of simulation results between CM or DM and CM+DM interference, it can be seen that the CM interference is the dominated interference mode which causes the conducted EMI in WCS in EVs. A strategy of giving priority to the dominated interference mode is proposed for designing the CM interference filter. Finally, the conducted voltage experiment is performed to verify the mitigation conducted emission strategy. The conducted voltage of simulation and experiment is decreased respectively by 21.17 and 21.4 dBµV at resonance frequency 30 MHz. The conduced voltage at frequency range of 150 kHz-108 MHz can be mitigated to below the limit level-3 of CISPR25 standard (GB/T 18655-2010) by adding the CM interference filters.

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Development of the Optimization Framework for Low-Power Wireless Power Transfer Systems

Cited by 17 publications

References 35 publications

Layout optimization of the secondary coils for wireless power transfer systems

Layout optimization of the secondary coils for wireless power transfer systems

Transmitter Module Optimization for Wireless Power Transfer Systems with Single Transmitter to Multiple Receivers

Mitigation Conducted Emission Strategy Based on Transfer Function from a DC-Fed Wireless Charging System for Electric Vehicles

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