Dual-Phase-Shift Control Scheme With Current-Stress and Efficiency Optimization for Wireless Power Transfer Systems

Li, Yong; Hu, Jiefeng; Chen, Feibin; Li, Fulin; He, Zhengyou; Mai, Ruikun

doi:10.1109/tcsi.2018.2817254

Cited by 123 publications

(39 citation statements)

References 31 publications

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“…Table 1 summarizes the design parameters and defines the constraints for each WPT system. Equations 7and (8) were considered as the fitness function for the optimal design of the inductive link system with the series and parallel connections of the load, respectively. One important factor in designing a WPT system is defining a set of realistic design constraints imposed by conditions, application and PSC fabrication technology to derive a feasible solution.…”

Section: Design Examplesmentioning

confidence: 99%

“…Moreover, a low Rx value imposes a fabrication limitation for PSC implementation. By comparing (7) and (8), it can be seen that the Rx coil parasitic resistance has a more severe effect on the inductive link with a parallel connection than that with series connection. While the SRFs obtained for the Rx and Tx coils used in the WPTs with series connection of the load were about 100 MHz, the SRFs obtained for the Rx coil used in the WPT4 and WPT5 were 3.27 GHz and 948 MHz, respectively.…”

Section: Design Examplesmentioning

confidence: 99%

“…A critical issue in the design of IMDs is the transferring of the required power to the implanted microelectronic device. To overcome the limitations of the current battery technologies and transcutaneous energy transfer for implanted devices, the wireless power transfer (WPT) system using inductively coupled coils has received considerable attention in recent years, not only in biomedical implants but also in a variety of industrial applications [3][4][5][6][7][8]. A WPT system consists of a highly efficient power amplifier (PA) connected to the transmitter (Tx) coil on the external side of the body and a secondary power receiver (Rx) coil on the internal side of the body.…”

Section: Introductionmentioning

confidence: 99%

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A Systematic Methodology for Optimal Design of Wireless Power Transfer System Using Genetic Algorithm

2020

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This paper presents a systematic methodology for the optimal design of wireless power transfer (WPT) systems. To design a WPT for a specific application, the values of coil geometric parameters and the number of resonators should be chosen such that an objective function is maximized while satisfying all the design constraints. The conventional methodologies, which are based on cyclic coordinate optimization, are not comprehensive and efficient methods. This paper presents a design methodology based on the genetic algorithm (GA). The optimization method has been applied to designing different WPTs with series and parallel connections of load and different design constraints. Moreover, the number of resonators is considered as the design parameters. In addition, WPTs with parallel and series connections of load are compared from different aspects. The results of calculation, simulation and measurements demonstrate that the 2-coil WPT can be optimized to achieve maximum efficiency compared to the previously reported 2-coil and multi-coil WPTs. In a fabricated 2-coil configuration, a power transfer efficiency (PTE) of 82.7% and a power delivered to the load (PDL) of 173.89 mW are achieved.

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Section: Design Examplesmentioning

confidence: 99%

Section: Design Examplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Systematic Methodology for Optimal Design of Wireless Power Transfer System Using Genetic Algorithm

2020

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“…The authors of [18] developed a control strategy based on dual-phase-shift control with an active rectifier to maintain a constant output voltage or current. The PSM technology based on HFI can guarantee constant current output or constant voltage output.…”

Section: Introductionmentioning

confidence: 99%

The Charging Control and Efficiency Optimization Strategy for WPT System Based on Secondary Side Controllable Rectifier

Zhang

Tan

et al. 2020

IEEE Access

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The equivalent resistance of the battery will change during charging in practical applications, so it is difficult to design a wireless power transfer (WPT) system with accurate constant current (CC) and constant voltage (CV) output characteristics. In addition, the WPT system efficiency is also affected by the change of equivalent resistance. Therefore, this paper studies the charging control and efficiency optimization strategy for the WPT system with dynamic loads. The WPT system with a structure of doublesided LCC compensation topology and containing controllable rectifier circuit at the secondary side is established, and the working process of full-bridge controllable rectifier circuit is analyzed. Then the output characteristics of the WPT system are analyzed. The expressions of the optimal transmission efficiency and the optimal equivalent impedance of the full-bridge rectifier are derived. The relationships between the equivalent impedance of the capacitor-filtered full-bridge controllable rectifier circuit and the phase shift angle, the charging current and the phase shift angle are also obtained. In this paper, the CC and CV charging strategies based on phase shift control of controllable rectifier circuit and efficiency optimization strategy based on dynamic equivalent impedance matching are proposed, which can improve the WPT system transmission efficiency while realizing CC and CV charging. Finally, the effectiveness of the proposed control strategy is verified by simulation and experiment. The WPT system realizes CC charging mode and CV charging mode in turn when the load resistance changes from 5 Ω to 30 Ω, and the overall efficiency is up to 90.71% at the transmission distance of 15cm. INDEX TERMS Wireless power transfer, constant current/voltage charging, efficiency optimization, phase shift control, dynamic impedance matching.

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“…Therefore, MEU technology has been increasingly utilized in a range of applications in recent years such as drone charging, power supply of multiple mobile electronic devices, and electric vehicle charging [1]- [5]. The main advantages of this method include: 1) large power transfer capacity; 2) high misalignment tolerance; 3) flexible power output; 4) high system efficiency (under some condition [15]); 5) low voltage and current stress on a single excitation unit [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Control for Multi-Excitation Units WPT System With Multiple Coupling Parameter Identification and Area Adaptation

Dai

Jiang

et al. 2020

IEEE Access

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In a multiple excitation unit wireless power transfer system, power control flexibility is a critical feature. To develop a system with environmental sensing capability and a smart power distribution strategy, a cooperative control method is proposed for the excitation units. A multiple coupling coefficient identification method was developed by utilizing the DC information of each excitation unit. Furthermore, a bi-operation mode with adaptive area division is proposed to achieve maximum efficiency in the optimum coupling area and to satisfy the fundamental power requirement for a weak coupling area. In the identification and control implementation process, this method is easy to implement and the response speed can be guaranteed because only the DC input current and the duty cycle of the DC regulator information are required. In addition, the proposed approach was evaluated based on experimental analysis.

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Dual-Phase-Shift Control Scheme With Current-Stress and Efficiency Optimization for Wireless Power Transfer Systems

Cited by 123 publications

References 31 publications

A Systematic Methodology for Optimal Design of Wireless Power Transfer System Using Genetic Algorithm

A Systematic Methodology for Optimal Design of Wireless Power Transfer System Using Genetic Algorithm

The Charging Control and Efficiency Optimization Strategy for WPT System Based on Secondary Side Controllable Rectifier

Cooperative Control for Multi-Excitation Units WPT System With Multiple Coupling Parameter Identification and Area Adaptation

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