Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Li, Weijie; Diao, Lijun; Mei, Weiyao; Dongye, Zhonghao; Qin, Xuqing; Jin, Zheming

doi:10.3390/electronics12091984

Cited by 3 publications

(4 citation statements)

References 34 publications

(66 reference statements)

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“…In this work, in two-phase inverters with IGBTs, the dead-time is considered as a mandatory parameter in order to prevent destructive and inefficient shoot-through currents [21].…”

Section: Switching Characteristics Without the Dead-time Effectmentioning

confidence: 99%

“…Considering all these facts [19][20][21][22][23][24][25][26][27][28], this paper presents a detailed theoretical analysis and experimental verification of the dead-time effect on a WPT system in an inverter.…”

Section: Introductionmentioning

confidence: 99%

“…If the dead-time is too short or too long, it can lead to increased power losses. A short dead-time may cause shoot-through current and increase switching losses, while a long dead-time can result in decreased power transfer efficiency due to extended periods of no power transfer [21,22].…”

mentioning

confidence: 99%

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Dead-Time Effect in Inverters on Wireless Power Transfer

Rajs,

Herceg,

Despotović

et al. 2024

Electronics

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This paper presents a comprehensive analysis of the dead-time effects in wireless power transfer systems based on LCC-S topology. In these systems operating at high frequencies, the ratio of dead-time versus the operating period becomes critical, and the dead-time issue can cause certain problems regarding power quality, efficiency, and output voltage ripple. The impact of input quantities such as voltage and switching frequency on the efficiency and output power of the LCC-S-tuned WPT system was also investigated. The optimal combination of these parameters used to achieve the maximum efficiency for a target output power and to set the appropriate value of the dead time were determined by running multiple simulations using the MATLAB R2023b software platform. It was also shown that the output voltage remained unchanged with and without a load and up to 1200 ns of dead-time, which provides a simple implementation of the corresponding mathematical model. In the recommended interval of 600–1500 ns, the influence of the dead-time on the value of the output voltage amplitude is less than 10%. The validity of the proposed method was confirmed through the implementation of the experimental prototype, a 5 kW wireless power transmission system, and the obtained results were in accordance with the simulation results.

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“…In this work, in two-phase inverters with IGBTs, the dead-time is considered as a mandatory parameter in order to prevent destructive and inefficient shoot-through currents [21].…”

Section: Switching Characteristics Without the Dead-time Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dead-Time Effect in Inverters on Wireless Power Transfer

Rajs,

Herceg,

Despotović

et al. 2024

Electronics

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“…This technology allows the transmission of electrical power without the need for physical connections. This convenient feature enables smooth charging of devices, electric vehicles, and other electronics, promoting enhanced mobility while eliminating the need for wires [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Variable Inductor Control Strategy in LCC-S Compensated Wireless Power Transfer Application

Meshram,

Corti,

Solimene

et al. 2023

2023 AEIT International Annual Conference (AEIT)

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This paper presents a control strategy for output voltage regulation of the LCC-S compensated Wireless Power Transfer (WPT) system through a variable inductor. Firstly, the architecture of the system is analyzed, and the relation between the output voltage and the variable inductance is derived. Then, the control strategy that allows to regulate the DC current through the variable inductor to maintain the desired output voltage is presented. Both the steady-state and the dynamic performance of the system are evaluated through Simulink simulations.

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Enhancing Wireless Charging for Electric Vehicles: Active Load Impedance Matching and Its Impact on Efficiency, Cost and Size

Allali

2024

Electronics

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This paper presents an advanced Wireless Power Transfer (WPT) system for electric vehicles (EVs) featuring Active Load Impedance Matching (ALIM) at the rectification stage. Unlike traditional synchronous rectification, ALIM dynamically adjusts load impedance, optimizing energy transfer efficiency and reducing thermal stresses, system costs, and mass. The system incorporates two circuits optimized for distinct frequency bands: one operates below 10 kHz using standard copper wiring for cost-effectiveness, and the other at 85 kHz, which significantly reduces the mass of the onboard coil and magnetic circuit while ensuring interoperability according to SAE J2954 standard. Our approach enhances charging efficiency across various operating conditions, improves thermal management, and minimizes maintenance costs. Additionally, it enables partial compensation for vehicle misalignment and ground assembly impedance, further boosting efficiency and interoperability. Experimental results demonstrate a notable increase in efficiency and reduction in system mass, confirming the superiority of the ALIM-equipped WPT system over conventional solutions. This paper underscores the potential of ALIM to advance the scalability, efficiency, and economic viability of wireless EV charging technology, promoting broader adoption and sustainability in EV infrastructures. By providing a comprehensive solution that addresses key challenges in wireless charging, our work paves the way for more efficient and cost-effective EV charging systems.

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Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Cited by 3 publications

References 34 publications

Dead-Time Effect in Inverters on Wireless Power Transfer

Dead-Time Effect in Inverters on Wireless Power Transfer

Variable Inductor Control Strategy in LCC-S Compensated Wireless Power Transfer Application

Enhancing Wireless Charging for Electric Vehicles: Active Load Impedance Matching and Its Impact on Efficiency, Cost and Size

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