Design and Optimization of Load-Independent Magnetic Resonant Wireless Charging System for Electric Vehicles

Cai, Changsong; Wang, Junhua; Fang, Zhijian; Zhang, Pengcheng; Guo, Kang-Xian; Zhang, Junkun; Li, Liang; Lin, Zhongzheng

doi:10.1109/access.2018.2810128

Cited by 95 publications

(59 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…C.Cai et al [4] proposes that compared with a circular coil, the mutual inductance of a square coil has greater stability and changes more slowly when a horizontal offset occurs. However, the current at the right angle of a square coil is uneven due to skin effect and proximity effect; a fillet design can be adopted to avoid the effect at the corner of a square coil to reduce resistance losses.…”

Section: Multi-turn Coil Designmentioning

confidence: 99%

Vehicle to Vehicle Charging (V2V) Bases on Wireless Power Transfer Technology

Mou

Zhao

Gladwin

2018

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

The slow development of energy storage technology combined with a limited number of plug-in charging stations negatively affects people's desire to purchase pure battery electric vehicles. A new wireless vehicle-to-vehicle charging technology structure is proposed, which can function with plug-in electric vehicles or operate independently. With a limited number of charging stations this technology can be used to increase charging opportunities through vehicle-to-vehicle (V2V) charging. V2V charging requires a number of technicial challenges to be overcome including the angular offset of the wireless power transfer resonant coils. The mutual inductance between two resonant coils is a key parameter for high power and efficient transfer of power. This paper presents the theory of angular offset multi-turn coil design.

show abstract

Section: Multi-turn Coil Designmentioning

confidence: 99%

Vehicle to Vehicle Charging (V2V) Bases on Wireless Power Transfer Technology

Mou

Zhao

Gladwin

2018

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

show abstract

“…Wireless charging technology is attracting attention for charging the batteries of electric vehicles (EVs). Inductive power transfer (IPT) is one of the most commonly used technologies to perform wireless charging [1][2][3][4][5][6][7][8][9][10]. A typical IPT system is composed of a transmitter coil and receiver coil which enables electric power transfer by alternating magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A Double Helix Flux Pipe-Based Inductive Link for Wireless Charging of Electric Vehicles

Hwang

Kim

2020

WEVJ

View full text Add to dashboard Cite

This paper presents a novel inductive link for wireless power transfer (WPT) system of electric vehicles (EVs). The WPT technology uses an alternating magnetic field to transfer electric power through space. The use of the WPT technology for charging electric vehicle provides an excellent alternative to the existing plug-in charging technology. It has been reported that the inductive link using planar coils such as the circular and rectangular coil are capable of transferring a high power with high efficiency. However, they have a poor tolerance for lateral misalignment, thus their power transfer efficiency decreases significantly with the misalignment. Due to the poor misalignment performance of the planar coil topology, extensive studies have been carried out on the flux pipe topology due to their excellent misalignment tolerance. To address this, in this paper, a novel inductive link using double helix flux pipe topology is proposed. The performances of the inductive link using the proposed double helix flux pipe are analyzed and compared with inductive links using conventional flux pipe. The proposed model has excellent characteristics in terms of the power transfer efficiency and tolerance against misalignments. The proposed model is capable of transferring over 1.6 kW of power with a coil-to-coil efficiency of over 98.5% at a load resistance of 20 Ω.

show abstract

“…As an ideal power transmission method, wireless power transfer system can transmit power from the power supply side to the equipment side under non-contact conditions [8]- [11]. Because of its advantages of safety, reliability and flexibility, it is widely used in various power transmission processes, such as mobile phone charging, electric vehicle charging, drone charging, etc., [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

Coaxial Nested Couplers-Based Offset-Tolerance Rotary Wireless Power Transfer Systems for Electric Excitation Motors

Wang

Nie

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In order to improve poor anti-offset capability of rotary transformer in electric excitation motor, a coaxial nested rotary wireless power transfer (CNR-WPT) system has been proposed in this paper. Firstly, considering the spatial geometric relationship of the coils and the power transmission efficiency of the CNR-WPT, the preliminary coil structure has been proposed. Secondly, through theoretical derivation, the specific relationship between the mutual inductance of the coils and the offset have been studied to verify the feasibility of the preliminary design. Thirdly, aiming at the problem that the CNR-WPT is susceptible to steel interference, the magnetic field has been optimized by adding ferrite and introducing a protective casing in this paper. Finally, an experimental platform for CNR-WPT system has been built. The experimental results verify that the power transmission efficiency of the CNR-WPT system can reach 90% when the radial offset and axial offset are below 5 mm, and the angular offset is below 5 •. The energy losses can be reduced by adding ferrite and protecting the casing. The CNR-WPT system thereof can also be applied to other rotary power transmission occasions. INDEX TERMS Electric excitation motor, coaxial nested rotary wireless power transfer system, anti-offset capability, power transmission efficiency.

show abstract

Design and Optimization of Load-Independent Magnetic Resonant Wireless Charging System for Electric Vehicles

Cited by 95 publications

References 17 publications

Vehicle to Vehicle Charging (V2V) Bases on Wireless Power Transfer Technology

Vehicle to Vehicle Charging (V2V) Bases on Wireless Power Transfer Technology

A Double Helix Flux Pipe-Based Inductive Link for Wireless Charging of Electric Vehicles

Coaxial Nested Couplers-Based Offset-Tolerance Rotary Wireless Power Transfer Systems for Electric Excitation Motors

Contact Info

Product

Resources

About