家庭用で便利なワイヤレス充電(Convenient wireless charging for home use)

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充電電界が均一なため、利用者に最適な新型送信機です。 A uniform charging field makes this new transmitter ideal for consumer devices.

2022-03-04 フィンランド・アールト大学

均一な充電フィールドを実現した、民生機器に最適な新型トランスミッターです。新しいワイヤレス充電システムは、その周りのリング内のどこにでも配置されたデバイスを充電できます。既存のシステムは、特定の方向または特定の位置に電力を転送します。ドーナツ型の充電フィールドを提供することにより、新しいシステムは、消費者が使用するためのより便利で信頼性の高い設計を提供します。

 

家庭用で便利なワイヤレス充電(Convenient wireless charging for home use)

A new wireless charging technology opens the door to developing charging stations for consumer use.
Photo: Aalto University


<関連情報>

Convenient wireless charging for home use | Aalto University
A uniform charging field makes this new transmitter ideal for consumer devices.
Cylindrical Transmitting Coil for Two-Dimensional Omnidirectional Wireless Power Transfer
Megahertz-range wireless power transfer has become a promising approach for increasing spatial freedom of charging. This...

<参考資料>

New power transfer technology provides unprecedented freedom for wireless charging

2次元無指向性無線電力伝送用円筒形送信コイル Cylindrical Transmitting Coil for Two-Dimensional Omnidirectional Wireless Power Transfer

Nam Van Ha; Yining Liu; Prasad Kumara Sampath Jayathurathnage; Constantin Simovski; Sergei Tretyakov

Abstract:

Megahertz-range wireless power transfer has become a promising approach for increasing spatial freedom of charging. This paper proposes a cylindrical-shaped coil, which can produce the homogeneous magnetic field in a plane. The coil consists of two helical windings, which are wound to guide the current in opposite directions. A single power source is used to excite the transmitter without any current amplitude or phase control circuits. Furthermore, since the parasitic capacitance of the coil is not negligible due to the complexity of the coil shape, we develop a general equivalent model with parasitic capacitance for the analysis of complex coils. The system efficiency of the proposed omnidirectional wireless power transfer device is validated by a practical experiment. The measured DC-to-DC efficiency of approximately 72.4% and the load power of 13 W are demonstrated for the proposed wireless charging system at 6.78 MHz operating frequency. Finally, we verify that the electromagnetic exposure satisfies the safety regulations.

Published in: IEEE Transactions on Industrial Electronics ( Early Access )
Page(s): 1 – 1
Date of Publication: 23 February 2022
ISSN Information:
DOI: 10.1109/TIE.2022.3151961
Publisher: IEEE

0401発送配変電
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