An Impedance Matching Network Tuning Method for Constant Current Output Under Mutual Inductance and Load Variation of IPT System

Zhang, Kehan; Wei, Gao; Zhang, Yan; Song, Baowei; Hu, Aiguo Patrick

doi:10.1109/tpel.2020.2978104

Cited by 19 publications

(3 citation statements)

References 23 publications

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“…tuning; passive impedance matching by inserting a network of passive components; and active impedance matching at the receiving side rectifier are among PTE maximization methods that are used in various applications [8], [9], [10]. Source frequency tuning is confined with bandwidth to meet standards, therefore the fixed-frequency methods are preferable [11].…”

Section: Introductionmentioning

confidence: 99%

Improving Wireless Power Transfer Efficiency Considering Rectifier Input Impedance and Load Quality Factor

Ghadeer,

Rezaei-Hosseinabadi,

Tabesh

et al. 2023

IEEE Access

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This paper presents a method to maximize power transfer efficiency (PTE) in wireless power transfer (WPT) systems with low-quality factors merely based on tuning the receiver-side components. The paper also suggests an algorithm to find the optimum components values considering the effect of input impedance of receiver-side rectifier at high-frequency (MHz) applications such as portable electronic devices. Existing methods often consider the input impedance of the full-bridge rectifier as a pure resistance at low frequencies. However, at high frequencies, the complex impedance of the rectifier should be taken into account since it impacts on the components optimum values to maximize PTE. Despite conventional maximizing PTE methods for series-series and series-parallel topologies, this paper shows that a series-parallel WPT system with low load quality factor requires adjusting the resonant capacitor in addition to resistive load. The validity of the proposed method is verified based on numerical simulations and experiment tests using a 100 mW cm-scale prototype of a resonant inductive link at 6.78 MHz with varying distance between coils. The test results show a PTE improvement up to 40% in a series-parallel WPT compared with the methods that only tune the load equivalent resistance.INDEX TERMS Coupling coefficient, inductive link misalignment, load quality factor, power transfer efficiency, rectifier impedance, wireless power transfer.

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Section: Introductionmentioning

confidence: 99%

Improving Wireless Power Transfer Efficiency Considering Rectifier Input Impedance and Load Quality Factor

Ghadeer,

Rezaei-Hosseinabadi,

Tabesh

et al. 2023

IEEE Access

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show abstract

“…However, for the magnetic resonance-based IPT system, the power level and efficiency are sensitive to the coupling coefficient [66]. With the frequency-splitting, the two peaks in the transferred power will be achieved for a given resonant frequency [67][68][69][70]. It can cause severe degradation in the performance of the IPT system [71].…”

Section: Introductionmentioning

confidence: 99%

A review of underwater inductive wireless power transfer system

Yang

Zhang

et al. 2023

IET Power Electronics

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The IPT system has been studied for underwater applications such as autonomous underwater vehicles (AUVs) and subsea sensors. However, it rarely comparatively shows the performance of the IPT system in air, freshwater, and seawater. Based on the fore‐mentioned research background, this paper presents a survey of the properties of the IPT system in different mediums. Here, a 100 W power‐level experimental IPT prototype is built and tested. The resonant frequency is set at 300 kHz with a gap range from 10 to 190 mm. The comparison is focused on the efficiency, mutual inductance, coupling coefficient, coil resistance, and quality factor of the IPT system. The IPT system is placed in air, freshwater, and seawater with the same settings. What's more, the magnetic fields of coupling coils in air, freshwater, and seawater are presented in this paper. This paper could be acted as a reference to optimize the IPT system and facilitate future IPT research for underwater applications by analysing the performance of the IPT system in different mediums. The 3D Ansys Maxwell simulation of the IPT system is also given here to study the magnetic fields.

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“…Unfortunately, the extra communication facilities will result in an increase in system size and expense. Many [34][35][36] have implemented the frequency adjustment to follow the greatest power transfer as the coupling coefficient moves beyond the critical coupled state. That does, however, primarily address the issue of output power loss under various coupling coefficients.…”

mentioning

confidence: 99%

Wireless Power Transfer System with Current-Doubler Rectifier on the Secondary Side—Analysis, Modeling, and Verification

Kindl,

Zavrel,

Tyrpekl

et al. 2023

Electronics

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In this paper, the proposal for the performance optimization of the wireless power transfer (WPT) system is given. The solution is based on the alternative configuration of the secondary-side rectifier. It is represented by a diode rectifier with a current doubler. Compared to the bridge rectifier, two diodes are replaced by the inductors. Initially, a system analysis was performed to investigate the electrical behavior and find the most optimal conditions referred to as terms of efficiency performance at nominal power. Due to this requirement, the rectifier inductors must be designed accordingly to meet this condition. The experimental verification was realized as well, while the proposed solution was compared to other common alternatives of the secondary-side rectification. The load sensitivity analysis in terms of efficiency performance was realized as well to observe the system behavior for a wide operation range. From the results, it is seen that the proposed alternative of the secondary-side rectification of the WPT system gives promising results in terms of high operating efficiency.

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An Impedance Matching Network Tuning Method for Constant Current Output Under Mutual Inductance and Load Variation of IPT System

Cited by 19 publications

References 23 publications

Improving Wireless Power Transfer Efficiency Considering Rectifier Input Impedance and Load Quality Factor

Improving Wireless Power Transfer Efficiency Considering Rectifier Input Impedance and Load Quality Factor

A review of underwater inductive wireless power transfer system

Wireless Power Transfer System with Current-Doubler Rectifier on the Secondary Side—Analysis, Modeling, and Verification

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