A New Coupling Structure and Position Detection Method for Segmented Control Dynamic Wireless Power Transfer Systems

Li, Xiaofei; Hu, Jiefeng; Wang, Heshou; Dai, Xin; Sun, Yue

doi:10.1109/tpel.2019.2963438

Cited by 59 publications

(23 citation statements)

References 12 publications

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“…According to (12), we know that Vo is determined by the sum of the induced voltages of the two receiver coils. Thus, to achieve the same rated output voltage as the single receiver system, the turns of each receiver coil should be halved.…”

Section: ) Mode A: Fb Rectifier Modementioning

confidence: 99%

“…It is worth noting that, since Rs1 and Rs2 are relatively small compared with RL, though the difference between Vs1 and Vs2 is limited, the difference between Is1 and Is2 is significant. According to (12) and (18), while ignoring the ESRs and VF, Vo in Mode A and B can be regarded as the same. Meanwhile, since the two receiver coils and their VD rectifier are symmetric, when Vs1-Is1Rs1<Vs2-Is2Rs2, the expressions of Vo, Is1, and Is2 are symmetric to ( 18)- (20).…”

Section: ) Mode B: Vd Rectifier With Dual Coil Receiving Powermentioning

confidence: 99%

“…The first is the long-track type [6]- [9], which is always designed to be tens or hundreds of meters. Although it can provide a flat magnetic field for vehicles, the Electromagnetic Interference (EMI) and power loss of the track coils are difficult to limit [10]- [12]. The second is the short-segment type [13], [14].…”

mentioning

confidence: 99%

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An Output Power Fluctuation Suppression Method of DWPT Systems Based on Dual-Receiver Coils and Voltage Doubler Rectifier

Liu

et al. 2023

IEEE Trans. Ind. Electron.

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In Dynamic Wireless Power Transfer (DWPT) systems, the power oscillation phenomena caused by coupling fluctuation are always hard to avoid. Moreover, if the adjacent track coils are excited by different inverters without synchronized drive signals, there will be severe power oscillations due to the frequency difference between the track coil currents. To address these issues, this work proposes a novel DWPT system based on dualreceiver coils and the Voltage Doubler (VD) rectifier. Depending on whether the induced voltages of the two receiver coils are balanced, the rectifier will switch between full-bridge mode and VD mode with no extra controller to maintain the system output under different positions. By designing the dimensions of the coupler, the DWPT system can achieve excellent output stability while avoiding the oscillation caused by the frequency difference between the track coil currents. In addition, the operation characteristic, power divisions, and boundary conditions of each operation mode are clarified. Finally, a 2.2 m 220 V-800 W prototype is built. The experimental results show that even with the track current frequency difference, the output voltage fluctuation is limited to 3.4% during motion, and the system efficiency remains above 90.76% in the case of an 8 cm air gap. Index Terms-Dynamic wireless power transfer (DWPT), Power fluctuation suppression, Dual-receiver coils, Voltage doubler rectifier. I. INTRODUCTIONN recent years, the applications of electric vehicles and automatic guided vehicles have developed rapidly. However, the onboard battery capacity limitation, distance anxiety, and inconvenient charging operations are still roadblocks to the mass acceptance of these vehicles. To solve these issues, Manuscript

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Section: ) Mode A: Fb Rectifier Modementioning

confidence: 99%

Section: ) Mode B: Vd Rectifier With Dual Coil Receiving Powermentioning

confidence: 99%

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An Output Power Fluctuation Suppression Method of DWPT Systems Based on Dual-Receiver Coils and Voltage Doubler Rectifier

Liu

et al. 2023

IEEE Trans. Ind. Electron.

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“…What’s more, an overlap design of four-Tx coil system is proposed 9 , where current phases of the four transmitting coils are tuned to achieve various field patterns and thus provide increased spatial freedom degrees. In contrast to works 6 – 8 , 10 – 12 that only pay attention to power transmission performance and constrain movement of receivers in a scale equivalent to their own size, some research 13 – 15 expands the transmitter to a range as large as the envisioned receiver free-moving space. In many cases, repeating resonant unit is adopted to form a two-dimensional transmitting plane 13 .…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to works 6 – 8 , 10 – 12 that only pay attention to power transmission performance and constrain movement of receivers in a scale equivalent to their own size, some research 13 – 15 expands the transmitter to a range as large as the envisioned receiver free-moving space. In many cases, repeating resonant unit is adopted to form a two-dimensional transmitting plane 13 . If all the resonant units work at the same frequency, power that enters the plane will be spread around until it covers the entire plane because there is persistent power exchange between adjacent resonators.…”

Section: Introductionmentioning

confidence: 99%

Wireless power transfer based on 2D routing

Schreurs

et al. 2022

Sci Rep

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In this paper, a dual-frequency wireless power transfer method is proposed, capable of achieving controllable routing and providing power through magnetic coupling resonance to various positions on a two-dimensional plane. The plane is composed of multiple power supply units with a uniform structure. Every unit has two different resonant states to switch, an activated state to power the receiver and a low-power inactive state adopted to maintain power required for state-switching. By switching and combining units in different states through wireless control circuits, directional wireless transfer of power on the plane can be realized. The circuit of power transfer through coupling is modelled and analysed. Electromagnetic simulations are conducted, followed by implementation and test of an experimental system. Both single-receiver and multiple-receiver situations are applicable in this method. The highest transmission efficiency can reach 93.3% under single receiver situation after coupling 5 units, which reveals satisfactory ability in flexibility and efficiency. Embedded in multiple application scenes, we envision further possibilities of this method such as indoor-device wireless charging and free-moving robot charging systems in factories.

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An Overview of Inductive Power Transfer Technology for Static and Dynamic EV Battery Charging

Mohamed¹,

Shaier²,

Metwally³

2022

Transportation Electrification

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A New Coupling Structure and Position Detection Method for Segmented Control Dynamic Wireless Power Transfer Systems

Cited by 59 publications

References 12 publications

An Output Power Fluctuation Suppression Method of DWPT Systems Based on Dual-Receiver Coils and Voltage Doubler Rectifier

An Output Power Fluctuation Suppression Method of DWPT Systems Based on Dual-Receiver Coils and Voltage Doubler Rectifier

Wireless power transfer based on 2D routing

An Overview of Inductive Power Transfer Technology for Static and Dynamic EV Battery Charging

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