Improved wireless power transfer system utilizing a rectifier with nonlinear resistance compression characteristic

Cheng, Bing; He, Li; Li, Le; Liu, Houxuan; Lu, Fengwang

doi:10.1016/j.apenergy.2022.120365

Cited by 10 publications

(6 citation statements)

References 30 publications

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“…1 is f1. The angular frequency ω1, primary side reactance Xp, and secondary side reactance Xs can be defined as Equation (1) to Equation (3).…”

Section: The Optimal Load For Ipt Systemmentioning

confidence: 99%

“…Wireless power transfer (WPT) technology frees us from the limitations of cables as conductive media [1], making it very suitable for the transmission of electric energy in rotating mechanisms, enclosed spaces, and special environments such as underwater, spray paint workshops, underground coal mines, and other flammable and explosive environments [2,3]. Inductive power transfer (IPT) is the most established and commonly employed method in the field of wireless power transfer technology [3,4], with advantages such as high transmission power, high efficiency, and high environmental applicability [5].…”

Section: Introductionmentioning

confidence: 99%

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An Novel Technique for Wireless Power Transfer Systems Based on the Parametric Set

Du,

Lan,

Wei

et al. 2023

J. Phys.: Conf. Ser.

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High efficiency and high power level are important indicators of the Inductive Power Transfer (IPT) system. However, the problem of optimizing the efficiency of IPT has not been well solved, and improving control methods is one of the effective ways to solve this problem. In order to improve the existing secondary-side control scheme and achieve the goal of simultaneously achieving optimal transmission efficiency and stable output, this paper suggests a parameter-based control strategy for coordinating the primary and secondary sides in the IPT system. This paper suggests a parameter-based control strategy for coordinating the primary and secondary sides in the IPT system. The paper develops a model of the IPT system to find the best load, then analyzes the active rectifier, phase shift angle, and load relationship to create a parameter set for controlling quantities like α and β. From there, a new control strategy is proposed and its effectiveness is confirmed through simulations. The proposed strategy enhances transmission efficiency and output stability of the IPT system, making it highly applicable in areas like electric vehicle charging and wireless charging devices.

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“…1 is f1. The angular frequency ω1, primary side reactance Xp, and secondary side reactance Xs can be defined as Equation (1) to Equation (3).…”

Section: The Optimal Load For Ipt Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Novel Technique for Wireless Power Transfer Systems Based on the Parametric Set

Du,

Lan,

Wei

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…RZ By the substitution of ( 11) into (15), we obtain the formula for the total waveform of the input current (17).…”

Section: Analytical Expression For Optimal Design Of Current-doubler ...mentioning

confidence: 99%

“…Then, a high-power transfer efficiency for the whole (or most) part of the load range can be achieved. Many studies have been conducted regarding this topic [17][18][19][20][21][22][23]. Generally, there are at least four commonly used methods that can realize load resistance transformation [24][25][26]:…”

Section: Introductionmentioning

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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“…The relationship between the input resistance of the full-bridge rectifier and load RL has been given by Equation (3). Then, equivalent resistance Rc in the function of the value of the load RL for the circuit in Figure 8 is given by [22] as (a) No additional imaginary impedance is generated during the conversion process; (b) Impedance enhancement when dc load value is smaller, and impedance compression when dc load value is larger. In other words, a nonlinear conversion characteristic is required to improve the transmission performance of WPT system.…”

Section: Topology Optimizationmentioning

confidence: 99%

Efficiency Improvement for Wireless Power Transfer System via a Nonlinear Resistance Matching Network

Yang

Chen

2023

Electronics

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The primary control is widely adopted to obtain a constant voltage output under a wider load range. However, for traditional full-bridge inverters under phase-shift control, due to the loss of soft switching, the system transmission efficiency will decrease rapidly. This problem can be improved by using a half-bridge inverter; however, the power transferred to receiving devices utilizing a half-bridge inverter is inadequate under a small dc load value. To solve these urge issues, a resistance matching network (RMN), constructed by a resonant inductor and capacitor, is added before the full bridge rectifier part of this paper. Owing to the nonlinear resistance conversion characteristics of the proposed RMN structure, the variation range of the equivalent AC impedance before the rectifier end can be compressed into an optimum range to enhance the poor transmission efficiency during the coils part. Simultaneously, when the DC load is small, the power capability of the whole system can be enhanced by increasing the equivalent ac load value; as a result, the insufficient power capability of the half-bridge inverter can be relieved. Finally, a 36 V output WPT system based on the proposed RMN and phase shift control is constructed. Additionally, the experimental results prove the feasibility of the theoretical analysis results.

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Improved wireless power transfer system utilizing a rectifier with nonlinear resistance compression characteristic

Cited by 10 publications

References 30 publications

An Novel Technique for Wireless Power Transfer Systems Based on the Parametric Set

An Novel Technique for Wireless Power Transfer Systems Based on the Parametric Set

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

Efficiency Improvement for Wireless Power Transfer System via a Nonlinear Resistance Matching Network

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