Detuned Resonant Capacitors Selection for Improved Misalignment Tolerance of LCC-S Compensated Wireless Power Transfer System

Li, Weijie; Mei, Weiyao; Yuan, Quan; Song, Yong; Dongye, Zhonghao; Diao, Lijun

doi:10.1109/access.2022.3172314

Cited by 11 publications

(6 citation statements)

References 33 publications

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“…Since the value of ω 0 is unchanged in this paper, the secondary side circuit is always fully tuned, and it has [32]…”

Section: Transmitting Side Receiving Sidementioning

confidence: 99%

“…From [32], it is known that by changing the compensation capacitances C s1 and C p1 (namely, α and β), the reduced system output voltage gain could be compensated to its rated value G v(Rated) . However, the adoption of capacitor arrays only can change the equivalent capacitances discretely, making the adjustability limited, and it also makes the whole transmitter system bulky.…”

Section: Transmitting Side Receiving Sidementioning

confidence: 99%

“…In [32], authors determine the values of α and β when the coupling situation changes according to two conditions: (1) G v = G v(Rated) ; (2) Soft-switching realizing condition. The experimental results have proved that the changed compensation capacitances can help the WPT system keep CV output and high efficiency when coil offset happens.…”

Section: Control Of the Active Lcc-s Compensated Networkmentioning

confidence: 99%

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Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Diao

Mei

et al. 2023

Electronics

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This paper proposes an active resonant network based on variable resonant capacitances to improve the operating performance of the LCC-S compensated topology in the wireless power transfer (WPT) system for electric vehicles under coil-misaligned conditions. By adjusting the series and parallel compensation capacitances on the transmitting side, the output voltage can be kept constant and the energy transfer efficiency can be improved under different coil offsets. The switch-controlled capacitors (SCCs) are used to change the compensation capacitances continuously. To find the proper compensation capacitances to achieve the excellent performance of the system, the optimization algorithm is applied, and the corresponding digital control strategy is described to regulate the equivalent capacitances of SCCs. Experimental results with a 2.7 kW power scale show that the output voltage is constant, and the operating efficiency is always over 90% in the WPT system with an active resonant network under different misalignment conditions. In addition, the system is delivering an equal amount of energy for all misalignments within the range of 80 mm, which improves the expected value of transferred energy by about 29%.

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“…Since the value of ω 0 is unchanged in this paper, the secondary side circuit is always fully tuned, and it has [32]…”

Section: Transmitting Side Receiving Sidementioning

confidence: 99%

Section: Transmitting Side Receiving Sidementioning

confidence: 99%

Section: Control Of the Active Lcc-s Compensated Networkmentioning

confidence: 99%

See 1 more Smart Citation

Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Diao

Mei

et al. 2023

Electronics

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“…Moreover, for integer-order WPT systems, the reflected impedance would vary with the change of the coupling coefficient and resonant frequency. [19][20][21] However, the properties of the reflected impedance in fractional-order magnetic coupled WPT systems are unknown. Therefore, this paper analyzes the reflected impedance characteristics of fractional-order WPT systems.…”

Section: Introductionmentioning

confidence: 99%

“…The literature 18 shows that the transfer efficiency of WPT systems depends on reflected impedance. Moreover, for integer‐order WPT systems, the reflected impedance would vary with the change of the coupling coefficient and resonant frequency 19–21 . However, the properties of the reflected impedance in fractional‐order magnetic coupled WPT systems are unknown.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of reflected impedance between fractional‐order and integer‐order wireless power transfer systems

Zhao

Yang

Wang

et al. 2022

Circuit Theory & Apps

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In a magnetic coupled wireless power transfer (WPT) system, reflected impedance is the equivalent impedance reflected from receiver to transmitter, playing an important role in transfer efficiency. However, the study on the reflected impedance of fractional-order magnetic coupled WPT systems is lacking. Therefore, this paper analyzes the reflected impedance characteristics of fractional-order WPT systems. Based on circuit theory, comparative investigations about the reflected impedance of fractional-order and integer-order WPT systems are performed. It is demonstrated that the reflected impedance of the fractional-order WPT system has a stronger anti-interference ability against the shift of coupling coefficient and resonant frequency than the integer-order WPT system. The experimental results verify the correctness of the theoretical analysis.

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Rectifier load modeling and zero voltage switching design of inductive power transfer system with S‐type topology on the secondary side

Shen,

Sun,

Wang

et al. 2024

Circuit Theory & Apps

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SummaryRectifier load in inductive power transfer system has nonlinear characteristics. However, the traditional analysis method equates it to a pure resistor, which leads to a certain deviation between the theoretical analysis and the actual circuit. This will reduce the accuracy of the inductive power transfer (IPT) system model and affect the soft switching operation of the inverter. In this paper, the IPT system with S‐type topology on the secondary side is studied. Firstly, the resistance–inductance characteristics of the rectifier load are analyzed by simulation, and then a second‐order circuit response model is established to solve the time‐domain expression of voltage and current. Then, the fundamental component of voltage and current is extracted by Fourier transform to calculate the impedance value of the rectifier load, and the mathematical calculation model of the rectifier load is established. On this basis, the influence of the inductive component of the rectifier load on the input impedance of the IPT system is analyzed. Then, a parameter design method for zero voltage switching is proposed for S‐S and LCC‐S topologies. Finally, an experimental platform of S‐S and LCC‐S IPT system is built. The correctness and effectiveness of the theoretical analysis and the proposed parameter design method are verified by experiments.

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Detuned Resonant Capacitors Selection for Improved Misalignment Tolerance of LCC-S Compensated Wireless Power Transfer System

Abstract: Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.

Cited by 11 publications

References 33 publications

Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Optimized Resonant Network Design for High Energy Transfer Efficiency of the WPT System

Comparative analysis of reflected impedance between fractional‐order and integer‐order wireless power transfer systems

Rectifier load modeling and zero voltage switching design of inductive power transfer system with S‐type topology on the secondary side

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