Research on Input-Parallel Single-Switch WPT System With Load-Independent Constant Voltage Output

Yuan, Hao; Wang, Chunfang; Dong-wei, Xia

doi:10.1109/tte.2022.3172328

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…With the increase of the difference between M 1 and M 2 , one receiver current will be clamped to zero due to the diode rectifier. According to (13), the current unclamped region of M k can be derived as:…”

Section: B Proposed Modelmentioning

confidence: 99%

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An Accurate Modeling and Suppression Method for Current Imbalance in Dual-Receiver WPT Systems for Low-Voltage and High-Current Applications

Li,

Chen,

Liu

et al. 2024

IEEE Trans. Transp. Electrific.

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Wireless power transfer (WPT) technology is a convenient charging method for AGVs without manual operation. To satisfy the low voltage and high current requirement for charging AGVs, the dual-receiver WPT system is used to improve the current capacity and to decrease the current stress in coils and devices. However, the dualreceiver system suffers from current imbalance or even current clamping issues when the coupler misalignment occurs with different mutual inductance on each receiver channel. The current imbalance defeats the original purpose of the design and causes receiver overload and device overstress. Therefore, this paper presents an accurate model to describe the dual receiver currents under coupler misalignment. The key factors and reason of the current imbalance are studied accordingly and then guide the design of the coupler and the circuit of the dual-receiver system. Moreover, according to the practical demand, a comprehensive control strategy is proposed to achieve current balance and constant voltage output simultaneously. Finally, an experimental prototype of 48V/30A is built to validate the proposed method. The experimental results show that with the control strategy, the current difference can be decreased from 29.31A to 0.26A under various misalignment conditions, while the efficiency increases by 1.8%.

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Section: B Proposed Modelmentioning

confidence: 99%

“…According to (13), in order to keep the currents of the two receiving coils identical, M k should be close to 1 as much as possible. Furthermore, for the coil structure used in the AGV scenario, the change of two mutual inductances M 1 and M 2 under both X-axis and Y-axis misalignment should be the same, which means M k ≈1.…”

Section: A Coil Designmentioning

confidence: 99%

An Accurate Modeling and Suppression Method for Current Imbalance in Dual-Receiver WPT Systems for Low-Voltage and High-Current Applications

Li,

Chen,

Liu

et al. 2024

IEEE Trans. Transp. Electrific.

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“…Therefore, it is necessary to study the problem of low-voltage and high-power demand for fast charging of EVs. In order to improve the transmission power of an IPT system, many scholars have made contributions in related fields and proposed circuit structures such as multi-inverter parallel [10], multi-transmit channel parallel [11], multi-inverter multi-rectifier [12], and so on. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [11], an input parallel structure based on a single switching circuit is proposed, which improves power while reducing switching loss compared with traditional inverters. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Influence Analysis of Voltage Imbalance in Input-Series, Output-Parallel (ISOP) Multichannel IPT System

Wang,

Sun,

Liang

et al. 2024

Electronics

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In order to solve the demand for efficient and stable low-voltage, high-power energy transmission capacity of electric vehicle (EV) fast charging, an ISOP-IPT system based on inductor-capacitor-capacitor series (LCC-S) compensation network is proposed. Firstly, the influence of compensation parameter inconsistency on the system is analyzed. On this basis, considering the resistance of coupler coils, the overall transmission efficiency of the system is analyzed. It is found that the voltage imbalance of the system will affect the working state of inverters, and then affect the stability of the system. The system transmission efficiency increases with the increase in mutual inductance. Moreover, the voltage imbalance caused by the inconsistency of compensation parameters and mutual inductance will reduce the transmission efficiency of the system. Finally, it is concluded that in the parameter design of the ISOP-IPT system, mutual inductance should be improved on the basis of ensuring the input voltage equalization of each channel so as to improve the transmission efficiency and working stability of the system. The experimental platform of a two-channel ISOP-IPT system is built and the maximum efficiency is 94.03%, which verifies the correctness of theoretical analysis.

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“…Wireless power transfer (WPT) technology enables energy to be transmitted through an air gap without physical contact [1][2][3][4][5]. Due to its advantages of safety, convenience, and flexibility, it is the best choice for charging, in place of cables [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Single-Switch Wireless Power Transfer Circuit Based on a Multi-Coil Array

Zhang

Guo

et al. 2023

Electronics

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In response to the issue of large input current ripple and noise, which can cause current shocks and compromise the overall stability in single-tube wireless power transmission systems, a P# type LCC-S compensation network and a multi-coil phase-shifting control method have been proposed to suppress input current ripple, improve input current waveform, reduce input current total harmonic distortion (THD), and ultimately enhance system efficiency and stability. Firstly, the working mode and waveform of the P# type LCC-S compensation network are analyzed, and the calculation method for its parameters is provided. Secondly, the analytical relationship between input current, input voltage, coil mutual inductance, and load impedance of the multi-coil array is derived. Additionally, Fourier transform is used to analyze the input current composition, and the phase shift suppression method is employed to reduce the input current ripple. Finally, a test platform is constructed to verify the relevant experiments. The experimental results demonstrate that the input current ripple is significantly suppressed at the rated transmission power, and the system efficiency is improved to 88.2%, which validates the effectiveness of the proposed method.

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Research on Input-Parallel Single-Switch WPT System With Load-Independent Constant Voltage Output

Cited by 8 publications

References 29 publications

An Accurate Modeling and Suppression Method for Current Imbalance in Dual-Receiver WPT Systems for Low-Voltage and High-Current Applications

An Accurate Modeling and Suppression Method for Current Imbalance in Dual-Receiver WPT Systems for Low-Voltage and High-Current Applications

Influence Analysis of Voltage Imbalance in Input-Series, Output-Parallel (ISOP) Multichannel IPT System

Optimization of a Single-Switch Wireless Power Transfer Circuit Based on a Multi-Coil Array

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