Combination of Compensations and Multi-Parameter Coil for Efficiency Optimization of Inductive Power Transfer System

Hu, Guozhen; Zhang, Junkun; Wang, Junhua; Fang, Zhijian; Cai, Changsong; Lin, Zhongzheng

doi:10.3390/en10122088

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…It can be seen from the Equation (5) that voltage gain is load-independent now, achieving CV output with Equation (4), X 3 , which is the imaginary component of the equivalent impedance for loop 3, could be rewritten as Equation (6).…”

Section: Voltage Gain and Methodology For CV Modementioning

confidence: 99%

“…It has the advantages of flexibility, and avoids the electric shock hazard. For application, IPT technology is largely implemented in biomedical implants, wearable electronics, electric automobiles and rail transport [5][6][7][8][9][10]. Some applications require constant voltage (CV) for charging, for example, mobile phone [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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A Three-Coil Inductively Power Transfer System with Constant Voltage Output

et al. 2018

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For a traditional 2-coil system outputting constant voltage (CV), the transfer efficiency decreases drastically as transfer distance increases. To solve this problem, this essay proposes a 3-coil system which could achieve CV output and Zero Phase Angle (ZPA) conditions with specific parameter values. This 3-coil system could partly relief transfer efficiency fall at a long transfer distance, without any complicated controls. In order to achieve CV and ZPA condition, this essay devises the parameter values based on the decoupling 3-coil model, and a prototype is designed accordingly to verify these characteristics. With 10 cm transfer distance, output voltage deviation is 5.5% as the load varies from 12 Ω to 200 Ω, proving that the output voltage almost keeps constant with load change. Furthermore, with software simulation, a comparison experiment between the proposed 3-coil system and a Series-Inductor-Capacitor-Inductor (S-LCL) compensated 2-coil system is built to verify the efficiency improvement. The transfer distance change leads to the differentiation of voltage gain for both 2-coil and 3-coil systems. So, the input voltage for both systems and the compensated capacitor in receiver loop of the 3-coil system are manipulated for keeping 60 V output voltage on the 12 Ω load. With distance increasing from 10 cm to 20 cm, transfer efficiency varies from 92.61 to 48.9% for the 2-coil system, and from 92.89 to 84.26% for the 3-coil system, effectively proving the efficiency improvement. The experiment and simulation results prove the effectiveness of the proposed method.

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Section: Voltage Gain and Methodology For CV Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Three-Coil Inductively Power Transfer System with Constant Voltage Output

et al. 2018

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Introduction

Zhai

2021

Electromagnetic Compatibility of Electric Vehicle

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Analysis, design and implement of asymmetric coupled wireless power transfer systems for unmanned aerial vehicles

Yang

et al. 2019

AIP Advances

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To solve the problem of short operating time of UAVs, this paper designs an asymmetric coupled wireless power transfer (WPT) system with optimized coupling structures and parameters, which effectively improves horizontal tolerance and performance for UAVs’ charging. Expressions of receiving power and transfer efficiency are derived to guide the design of parameters by modeling and analyzing the WPT systems. Structures and parameters of coupling coils are optimized to improve the quality factor and horizontal tolerance by simulations and comparison. System characteristics are further calculated and optimized with compensation topology. A prototype platform is implemented to verify the analysis and design, and experimental results show that it can achieve 64.87 W power transfer for UAVs with 57.94 % transfer efficiency, and the system is tolerant to horizontal misalignments of coupling coils. The analysis, design and implementation of asymmetric coupled WPT systems provides an important reference for the application of WPT technology in UAVs’ charging.

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Combination of Compensations and Multi-Parameter Coil for Efficiency Optimization of Inductive Power Transfer System

Cited by 4 publications

References 24 publications

A Three-Coil Inductively Power Transfer System with Constant Voltage Output

A Three-Coil Inductively Power Transfer System with Constant Voltage Output

Introduction

Analysis, design and implement of asymmetric coupled wireless power transfer systems for unmanned aerial vehicles

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