Modeling of a Magnetic Coupler Based on Single- and Double-Layered Rectangular Planar Coils With In-Plane Misalignment for Wireless Power Transfer

López-Alcolea, Francisco Javier; Vázquez, Javier; Roncero‐Sánchez, Pedro; Torres, Alfonso Parreño

doi:10.1109/tpel.2019.2944194

Cited by 40 publications

(15 citation statements)

References 35 publications

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“…The diversity of coil geometries contributes to the founding of many types of couplers. Among the coupler designs are the CSC [40,[42][43][44][45], SC [36,39,46], RC [47][48][49] and DDC coils [17,23,50]. Over the years, some innovative coupler geometry designs have been proposed, for instance, bipolar coil (BC) [51,52] and double-D quadrature coil (DDQC) [28].…”

Section: Related Workmentioning

confidence: 99%

A brief review: basic coil designs for inductive power transfer

Nanda

Yusoff

Toha

et al. 2020

IJEECS

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The inductive power transfer (IPT) has contributed to the fast growth of the electric vehicle (EV) market. The technology to recharge the EV battery has attracted the attention of many researchers and car manufacturers in developing green transportation. In IPT charging system, the coil design is indispensable in enhancing the EV battery charging process performance. This paper starts by describing the two charging techniques; static charging and dynamic charging before further presents the IPT system descriptions. Afterwards, this paper describes a brief review of coil designs which discusses the critical factors that affect the power transmission efficiency (PTE) including their basic designs, design concepts and features merits. The discussions on the basic coil designs for IPT are of the circular spiral coil (CSC), square coil (SC), rectangular coil (RC), and double-D coil (DDC). Furthermore, the significant advantages and limitations of each research on different geometries are analyzed and discussed in this paper. Finally, this paper evaluates some essential aspects that influence the coil geometry designs in practical.

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Section: Related Workmentioning

confidence: 99%

A brief review: basic coil designs for inductive power transfer

Nanda

Yusoff

Toha

et al. 2020

IJEECS

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“…Next, substituting (9) into (11) leads to the critical current condition between the primary Tx and Rx, .…”

Section: A Analysis Of Two-tx Systemmentioning

confidence: 99%

“…Letting (11) equal (12) and using the definition of the free resonant angular frequency of the Rx, , gives .…”

Section: A Analysis Of Two-tx Systemmentioning

confidence: 99%

“…Nevertheless, there is still a fundamental problem that typical WPT systems with a single transmitter (Tx) and receiver (Rx) have a maximum output power only at a specific distance corresponding to critical coupling between Tx and Rx [6]. In particular, lateral misalignment between Tx and Rx causes the mutual coupling to be significantly weaker, resulting in reduced output power [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Capacitance Tuning Method for Maximum Output Power in Multiple-Transmitter Wireless Power Transfer System

Jeon

Seo

2020

IEEE Access

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It is common knowledge that wireless power transfer (WPT) systems with multiple transmitters (Txs) and a single receiver (Rx) have robust efficiency against lateral misalignment. However, the unnecessary coupling among Txs in actual multi-Tx WPT systems causes transmission efficiency degradation, and then additional tuning work is required to adjust some system parameters, such as the phase or frequency of Tx sources. Moreover, the frequency-splitting phenomenon caused by over-coupling between the Txs and Rx still occurs in multi-Tx systems. Thus, output power degradation is inevitable in the over-coupled state. In this paper, we propose an optimal capacitance tuning method that is applicable to multi-Tx WPT systems. A multi-Tx WPT system tuned with the optimal capacitances, which are obtained from the critical coupling condition between Txs and Rx, not only compensates the inner coupling among Txs but also achieves the maximum output power in the over-coupled state. To verify the validity of the proposed method, we implemented two-and three-Tx and single Rx WPT systems and measured the output power of load with respect to the Rx position along the x-and y-axes. As a result, with the proposed method without any changes in the operating frequency or phase, the systems could deliver higher output power than the conventional phase-controlled system. In particular, with the proposed method, the systems maintained the constant maximum transmission efficiency of 80% in the over-coupled state. INDEX TERMS magnetic beamforming, multiple transmitter, maximum output power, optimal tuning, power transfer efficiency, transmission efficiency, wireless power transfer.

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“…Nevertheless, the performance of the control system should be investigated when the coupling factor undergoes deviations from its rated valued. In accordance with [39], where the influence of the misalignment on the coupling factor is analyzed, the previous simulation cases are repeated considering a decrease in the actual value of k of a 30% with regard to the rated value k n , i.e., k = 0.7k n , while maintaining the same control parameters. (e) the current i 0 ; (f) the voltage of the battery v b ; (g) the DC voltage v DC1 ; (h) the grid power P g (blue), the power at the input of the DC-DC converter P dc (red) and the battery power P b (green); (i) currents of the compensated magnetic coupler i 1 (blue), and i 2 (red); (j) voltages across the compensated magnetic coupler v 1 (blue), and v 2 (red).…”

Section: Performance With Variations In the Coupling Factormentioning

confidence: 99%

Control Scheme of a Bidirectional Inductive Power Transfer System for Electric Vehicles Integrated into the Grid

et al. 2020

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Inductive power transfer (IPT) systems have become a very effective technology when charging the batteries of electric vehicles (EVs), with numerous research works devoted to this field in recent years. In the battery charging process, the EV consumes energy from the grid, and this concept is called Grid-to-Vehicle (G2V). Nevertheless, the EV can also be used to inject part of the energy stored in the battery into the grid, according to the so-called Vehicle-to-Grid (V2G) scheme. This bidirectional feature can be applied to a better development of distributed generation systems, thus improving the integration of EVs into the grid (including IPT-powered EVs). Over the past few years, some works have begun to pay attention to bidirectional IPT systems applied to EVs, focusing on aspects such as the compensation topology, the design of the magnetic coupler or the power electronic configuration. Nevertheless, the design of the control system has not been extensively studied. This paper is focused on the design of a control system applied to a bidirectional IPT charger, which can operate in both the G2V and V2G modes. The procedure design of the control system is thoroughly explained and classical control techniques are applied to tailor the control scheme. One of the advantages of the proposed control scheme is the robustness when there is a mismatch between the coupling factor used in the model and the real value. Moreover, the control system can be used to limit the peak value of the primary side current when this value increases, thus protecting the IPT system. Simulation results obtained with PSCADTM/EMTDCTM show the good performance of the overall system when working in both G2V and V2G modes, while experimental results validate the control system behavior in the G2V mode.

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Modeling of a Magnetic Coupler Based on Single- and Double-Layered Rectangular Planar Coils With In-Plane Misalignment for Wireless Power Transfer

Cited by 40 publications

References 35 publications

A brief review: basic coil designs for inductive power transfer

A brief review: basic coil designs for inductive power transfer

Capacitance Tuning Method for Maximum Output Power in Multiple-Transmitter Wireless Power Transfer System

Control Scheme of a Bidirectional Inductive Power Transfer System for Electric Vehicles Integrated into the Grid

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