Mode Conversion and Structure Optimization of Quadrature Coils for Electric Vehicles Wireless Power Transfer

Zhang, Xi; Zhang, Yameng; Zhang, Zhimin; Li, Mayan

doi:10.1109/tec.2020.2972584

Cited by 27 publications

(6 citation statements)

References 23 publications

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“…Moreover, safe operation of the inverter in case of misalignment, and improvement of light load efficiency can be achieved [104]. The LCC-based topologies such as LCC-S [105-108], the LCCC-S [109], the LCC-SP [110], the LCC-P [111,112], and the LCC-LCC [113][114][115][116][117] are widely used in the IPT application due to its suitable performance. Although the LCC-P topology has a constant output current behavior, Zero Phase Angle (ZPA) switching is not achievable [112].…”

Section: ) High Order Topologiesmentioning

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: ) High Order Topologiesmentioning

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 [59], an intermediate coil, which can be switched by an additional inverter between the repeater-aided and power-interactive modes, is designed to enhance the system efficiency and misalignment tolerance. A novel magnetic coupler with a flexible coil structure according to the relative position of the primary and secondary coils is proposed to enhance the horizontal misalignment tolerance [60]. A stacked coil is designed to tolerate lateral misalignment [61].…”

Section: Reconfigurable Topologiesmentioning

confidence: 99%

High-Order Compensation Topology Integration for High-Tolerant Wireless Power Transfer

et al. 2023

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Wireless power transfer (WPT) has been a promising way to transfer power wirelessly over certain distances through the mutual inductance (MI) of the magnetically coupled transmitter and receiver coils, providing significant benefits of convenience, safety, and feasibility to special occasions. The stable output and efficiency cannot be maintained due to the load variation and the inevitable misalignment between the magnetic couplers. High-order compensation topologies that are highly flexible in design due to more compensation elements are essential for the WPT to suppress the load variation and misalignment effects. However, due to core loss and thermal management, high-power-level and high-frequency inductor design have always been challenging for WPT systems. Space occupation and cost are other aspects to be considered for inductor design. Thus integrating these additional bulky inductors into the main coils has been a critical trial. As a result, the compensation topologies’ original input and output profiles will change or even disappear. This paper reviews the existing high-order compensation topologies and their integration principles and implementation for the WPT to obtain high misalignment tolerance. The design objectives and challenges of the integrated compensation topology in terms of misalignment tolerance capability are discussed. The relevant control systems to cope with coil misalignment and load variations are investigated. Challenges and future development of the high-tolerant WPT are discussed.

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“…For example, LCC compensation topology has been proposed to reduce the output power pulsation in dynamic WPT [10], [11]. In addition, different coil designs, namely, DD-coil [16], DDQ-coil [17], quadrature-coils [18], DQ-Icoil [12], [13] have been adopted with the goal to maintain ro- bust power transfer against one-dimensional (linear movement) receiver movements. Alternatively, a combination of DD-coils and square-coils as a linear Tx array can help to further improve the power profile along the array [14].…”

Section: Introductionmentioning

confidence: 99%

Large-Area Free-Positioning Wireless Power Transfer to Movable Receivers

Mahmud

Panhwar

Jayathurathnage

2022

IEEE Trans. Ind. Electron.

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This paper introduces a method for efficient and robust free-positioning wireless power transfer (WPT) in a large area, which can be applied to many use cases including wireless charging of industrial robots, drones, or electric scooters. In these large area WPT applications, multiple transmitters (Txs) are placed in a pad-like area, and the transmitter coils are optimally excited to enable robust and efficient power transfer to movable receivers within the charging area. The proposed configuration enables almost continuous magnetic flux path from a set of Tx coil(s) to another set of Tx coil(s) through the receiver coil ferrite core. Therefore, efficient power transfer is ensured throughout the whole Tx coverage area. The paper introduces a novel method to detect the position and orientation of the receiver only from the Tx-side measurements. The proposed solution is experimentally verified in a laboratory prototype, and the experimental results show DC-to-DC efficiency of 91% with only 1% variation in most of the Rx positions.

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Mode Conversion and Structure Optimization of Quadrature Coils for Electric Vehicles Wireless Power Transfer

Cited by 27 publications

References 23 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

High-Order Compensation Topology Integration for High-Tolerant Wireless Power Transfer

Large-Area Free-Positioning Wireless Power Transfer to Movable Receivers

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