電気自動車用非接触給電装置のトランス巻線方式による特性比較

Kaneko, Yasuyoshi; Ehara, Natsuki; Iwata, Takuya; Abe, Shigeru; Yasuda, Toru; Ida, K.

doi:10.1541/ieejias.130.734

Cited by 18 publications

(8 citation statements)

References 9 publications

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“…Inductance components of the equivalent circuit model of Figure 3 are expressed below in Equations (18)-(21) by comparing the inverse matrix of Equation (17) and matrix elements in Equations (10) and (11). 22…”

Section: Equivalent Circuit Of Four-winding Transformermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…A number of studies were dedicated to improvement of magnetic coupling between primary and secondary sides of IPT systems; particularly, techniques were proposed recently to increase equivalent coupling coefficient of entire coil setup by using multiple windings. [10][11][12][13][14][15][16][17][18] Ref. 13 proposes an IPT system using repeater coils to absorb misalignment and to expand power transmission distance.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of equivalent magnetic coupling coefficient of wireless power transfer system with multiwinding transmission coil

Furukawa

Kusaka

Itoh

2019

Electrical Engineering Japan

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This article proposes a novel method of improving the overall coupling coefficient of a wireless power transfer system by using a four‐winding transformer of which two pairs of windings each are connected in parallel in the primary side and secondary side. By weakening the coupling coefficients kc between the parallel windings, the overall magnetic coupling between the primary side and secondary side of the transformer is improved. In order to confirm the validity of the proposed method, a conventional high‐kc four‐winding transmission coil and the proposed low‐kc four‐winding transmission coil are experimentally assessed. Then, the coils are introduced into a nonresonant inductive power transfer system utilizing a dual active bridge converter in order to confirm the correction of the input power factor. As a result, the overall magnetic coupling of the proposed four‐winding coils was found to be improved by 17% compared with the overall magnetic coupling of the conventional coil. Moreover, the input power factor for the entire load is corrected with the proposed four‐winding coil. Therefore, a low kc is effective in improving the overall magnetic coupling.

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Section: Equivalent Circuit Of Four-winding Transformermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of equivalent magnetic coupling coefficient of wireless power transfer system with multiwinding transmission coil

Furukawa

Kusaka

Itoh

2019

Electrical Engineering Japan

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“…Inductive power transfer (IPT) systems using high frequencies (HFs) to supply power without contact have been extensively studied for many applications from pace makers to automobiles, railways, and so on [1][2][3][4][5][6][7][8][9]. In the recent years, IPT systems were considered for supplying power to electric vehicles (EVs) on the run, and various methods have been proposed for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Experimental Verification for Practical Application of Inductive Power Transfer System for Railway

Shimode

Murai

Sawada

2016

Electrical Engineering Japan

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SUMMARY Inductive Power Transfer systems (IPT systems) for moving Electrical Vehicles (EVs) are often discussed. However, an IPT system for moving railway vehicles has not been sufficiently examined. In order to employ the IPT system for railway vehicles, this paper examines the characteristics of railway IPT systems, such as efficiency, temperature rise, and durability. Because the required characteristics of the IPT system for railway are different from those of EV, one example of a railway IPT system is proposed, and the verification items for practical use are examined. Moreover, we manufactured test equipment that can imitate the field environment in order to verify these items before practical use in the field. The test procedure and test results demonstrate the possibility of practical use of a railway IPT system.

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“…Power range of CPT systems for automobiles is 3kW to 50kW and some of them are almost in the commercial stage [1] . [3] . On the other hand, 300kW class CPT systems are required for railway vehicles power feeding applications.…”

Section: Introductionmentioning

confidence: 99%

Contactless high power transformer technologies for railway vehicles

Kondo

Yamamoto

Kitazawa

2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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The contactless power transformer systems (CPTs) have recently attracted much attention as it is possible to supply electrical energy to mobile vehicles without cables. 300kW class CPT systems are required for railway vehicles power feeding applications. In this power range, there are some technical problems such as higher reactive power due to longer gap and power control at the misalignment of ground coils and on-board coils. To cope with these problems, authors have been working to establish a reactive power conscious coil designing method and less loss type power conversion system with controlling active power in the secondary side. In this paper, some of these results are presented

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電気自動車用非接触給電装置のトランス巻線方式による特性比較

Cited by 18 publications

References 9 publications

Improvement of equivalent magnetic coupling coefficient of wireless power transfer system with multiwinding transmission coil

Improvement of equivalent magnetic coupling coefficient of wireless power transfer system with multiwinding transmission coil

Experimental Verification for Practical Application of Inductive Power Transfer System for Railway

Contactless high power transformer technologies for railway vehicles

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