Maximizing the efficiency of wireless power transfer systems with an optimal duty cycle operation

Sis, Seyit Ahmet; Akça, Hakan

doi:10.1016/j.aeue.2020.153081

Cited by 14 publications

(6 citation statements)

References 28 publications

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“…• Duty cycle: in this technique, the inverter's output voltage is adjusted. As demonstrated in [145], varying the duty-cycle of a full-bridge inverter leads to different power levels for a fixed mutual inductance.…”

Section: ) Primary Invertermentioning

confidence: 99%

Operation of Inductive Charging Systems Under Misalignment Conditions: A Review for Electric Vehicles

Ramezani

Triviño-Cabrera

et al. 2023

IEEE Trans. Transp. Electrific.

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Inductive power transfer (IPT) for Electric Vehicles (EVs) is an emerging technology that can transfer power wirelessly over certain distances, thus offering some remarkable characteristics in terms of flexibility, position and movability. The output power of an IPT system depends on the coupling factor of the magnetic couplers which can deviates from the nominal operating conditions due to occurrence of misalignment. Nevertheless, misalignment of the magnetic couplers in inductive charging is inevitable, and it usually results in the variation of the mutual inductance and output power of the system with corresponding decrease in the system overall efficiency. So far, the literature has reported various techniques for achieving designs with higher misalignment tolerance. The reported techniques can be mainly classified into three categories, as viewed from the following aspects: magnetic couplers layouts, compensation networks and control strategy. Each of these techniques has its pros and cons in terms of implementation cost, system layout, efficiency, power density and reliability depending on the application. With the increased investigation of more applications of IPT, new modified techniques of improving the misalignment tolerance in the IPT system are continuously being proposed based on permutations and combinations of the existing ones; thus causing some confusion and difficulties for researchers and system vendors to follow. This paper, therefore, aims to provide a comprehensive review of the existing methods for IPT systems that address the misalignment issue in EVs wireless charging. A review of the IPT system is presented and an investigation of the numerous factors affecting the output power and performances of the system when the coils are not aligned. In addition, the advantages and disadvantages of each technique on the IPT system's performance are analyzed in detail.

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Section: ) Primary Invertermentioning

confidence: 99%

Operation of Inductive Charging Systems Under Misalignment Conditions: A Review for Electric Vehicles

Ramezani

Triviño-Cabrera

et al. 2023

IEEE Trans. Transp. Electrific.

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“…In this context, wireless charging systems for electric vehicles represent a significant technological advancement with the potential to make the charging process more userfriendly, accessible, and practical to reach a higher user rate. The wireless power transfer (WPT) system [3,4] enables the transfer of energy by utilizing primary and secondary coils used for charging electric vehicles [5]. Figure 1 illustrates an example of a WPT system.…”

Section: Introductionmentioning

confidence: 99%

Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications

Akca,

Aktas

2024

Int. J. Optim. Control, Theor. Appl. (IJOCTA)

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The studies on Wireless Power Transfer (WPT) technology and peripherals in Electric Vehicle (EV) applications are intensifying. While the energy received from the WPT system is transferred to the EV battery, the direct current (dc)/dc converter circuits are used. The dc/dc buck converter topologies are one of them. The converter circuits must be highly efficient, lightweight, and compact to have a high range in EV vehicles. There are asynchronous buck, synchronous buck, and interleaved synchronous buck converter circuit topologies from the literature. In this study, the efficiency results of these circuit topologies were analyzed using MATLAB/Simulink and experimental studies. This study contributes to the literature by conducting circuit-level efficiency analysis and component-level power loss analysis. It has been observed that the interleaved synchronous buck converter circuit operates at 99% efficiency at 1066 W. In addition, it has been shared with the oscilloscope results that the current ripples of this circuit topology are lower than other circuit converters. Specifically, there has been a significant reduction of 56% in power losses, particularly in the interleaved synchronous buck converter (ISBC). This study analyzes the dynamic behavior of the dc/dc buck converter topologies, and results about their performance are given.

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“…circuits (series-series, series-parallel, parallel-series, parallelparallel). [15][16][17] Besides, some inverter topologies like H-bridge [18,19] and Half-bridge [20] have been used, which introduce complexity of the control system of the structure, which leads to an increase in losses due to the time and delays of commutations caused by high frequencies. This article proposes the idea of magnetic resonance wireless power transfer (RWPT), [21][22][23][24] whose goal is to model and design a wireless solar transfer chain for EV charging.…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic Class‐E Inverter for Resonance Wireless Power Transfer for Electric Vehicle Charging Applications with Optimization Algorithms

et al. 2023

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A wireless power transfer (WPT) station supplied by an array of solar panels is presented, where solar energy comes from an array of panels with 120 V voltage and 3 A current. It is subjected to maximum power point tracking algorithm optimization on a boost converter, where the duty cycle of the converter is adjusted with an interval chosen between [0.2, 0.8], which is used to iteratively compare between the input and output signals in order to have a maximum power at the output. After regulating the panel array signal through the boost converter, the signal is transferred to an additional middle stage whose role is to raise the frequency until it reaches the resonance frequency of the WPT charger. The device responsible for this task is an inverter based on a class‐E inverter architecture and a GaN transistor technology. The inverter is controlled by a DSP card in a hard‐switch mode and delivers the output signal with a frequency of 10 Mhz, which is the resonance frequency of spiral coils of wireless chargers. Herein, the signal nature can be seen at the terminal of a fixed load with signal optimization through the MPPT algorithm and the HF inverter control mode.

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Maximizing the efficiency of wireless power transfer systems with an optimal duty cycle operation

Cited by 14 publications

References 28 publications

Operation of Inductive Charging Systems Under Misalignment Conditions: A Review for Electric Vehicles

Operation of Inductive Charging Systems Under Misalignment Conditions: A Review for Electric Vehicles

Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications

Photovoltaic Class‐E Inverter for Resonance Wireless Power Transfer for Electric Vehicle Charging Applications with Optimization Algorithms

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