Equivalent circuit modeling of a multilayer planar winding array structure for use in a universal contactless battery charging platform

Liu, Ming; *, Hui

doi:10.1109/apec.2005.1453187

Cited by 12 publications

(16 citation statements)

References 4 publications

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“…The coils in the bottom layer are overlapping with respect to the coils in the top layer. Such a topology can produce a local magnetic field at each position above its surface, such that the wearable sensor nodes can be placed randomly on top of the patient [37,38,31]. The coil matrix is embedded in a 600 mm by 450 mm medium-density fiberboard (MDF).…”

Section: The Inductive Power Transmittermentioning

confidence: 99%

“…These contactless energy transfer (CET) platforms enable a convenient new way to charge mobile consumer products [28][29][30]. A popular choice in literature to increase the freedom of CET device placement and to allow the charging of several devices simultaneously, is by using multiple primary windings [31]. To increase the platforms efficiency, in some systems the primary coils can be individually activated so that only a few primary windings closest to the load device are turned on [32].…”

Section: Introductionmentioning

confidence: 99%

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Contactless energy transfer at the bedside featuring an online power optimization strategy

Clercq

Puers

2014

Sensors and Actuators A: Physical

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a b s t r a c tThis paper introduces the principle of contactless energy transfer to wearable bedside electronics. As a proof of concept, a platform containing a matrix of magnetic energy transmitters has been developed and integrated into a mattress. This system is able to feed one or more wearable sensor nodes, attached to the patient, with the purpose of wirelessly recording vital signals over an extended period of time. Each of these power transmitters is designed to transfer up to 10 mW of power over a maximal distance of 300 mm. Moreover, the platform embeds online optimization software to deal with vertical as well as horizontal sensor node movements. The position and orientation of each freely moving sensor node can be dynamically determined and a local magnetic field, with a matching radiated power level, can be selectively induced in the area where the sensor nodes are positioned. This approach therefore limits the radiation exposure to the patient to the minimum viable level. The prototype is successfully tested in a laboratory set-up.

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Section: The Inductive Power Transmittermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Contactless energy transfer at the bedside featuring an online power optimization strategy

Clercq

Puers

2014

Sensors and Actuators A: Physical

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“…This system also has a high degree of freedom regarding the placement of the secondary devices. Unlike [5], however, this system does not make use of a special magnetic field profile, but makes use of the existing inductance path between the primary and secondary windings, to send signals that indicate the presence of a secondary load device. This method however, requires extra circuits and intelligence on the secondary device to work.…”

Section: Introductionmentioning

confidence: 98%

“…Similar to [5], this system uses multiple circular coils embedded into a desk to transfer power to devices placed on top of the table surface. The primary coils can be individually activated, and only a few primary windings closest to the load device are activated at a time.…”

Section: Introductionmentioning

confidence: 99%

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Load position detection and validation on variable-phase contactless energy transfer desktops

Sonntag

Duarte

Pemen

2009

2009 IEEE Energy Conversion Congress and Exposition

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In this paper, a method for locating and validating different load devices placed on a variable-phase CET desktop is presented. The CET desktop consists of multiple embedded primary coils, which have the ability to power small electronic devices, such as cellular phones, music players, and PDA's laying on its surface. Here, only the three primary coils closest to the load device are used to transfer power, and it is thus important for the system to correctly locate the positions of the load devices laying on the table. The presented method can detect the positions, and distinguish between three different types of objects placed on the table, namely, valid resonant load devices, conductive materials and ferrites. The objects are detected through the process of "scanning" which involves energizing each coil for a short duration of time, while measuring its impedance. Each object type influences the coil impedance in a different manner, which can be detected by the CET system. In this way, the object positions and types can be accurately estimated. The system is implemented, and various load detection experiments are performed on the prototype. The results show measurable and predictable changes in the coil impedances, and the system is able to correctly locate and identify all the objects placed on the CET desktop.

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A coil layout of wireless power transfer systems based on multicoil arrangement for underwater vehicles

Sato

Kifune

Komeda

2019

Electrical Engineering Japan

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This paper proposes an optimal coil layout of wireless power transfer (WPT) systems for underwater vehicles (UVs). The power supply station adopts a multicoil arrangement with a double layer, and the UV also uses two receiving coils. The proposed WPT system for UVs has a reasonable advantage, where it does not request to adjust the relative position of coils. This paper experimentally discusses an optimal coil layout based on measurement results of a coupling coefficient. As a result, the proposed coil arrangement with the geometry rule realizes a certain power transfer under any positions and directions of UVs.

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Equivalent circuit modeling of a multilayer planar winding array structure for use in a universal contactless battery charging platform

Cited by 12 publications

References 4 publications

Contactless energy transfer at the bedside featuring an online power optimization strategy

Contactless energy transfer at the bedside featuring an online power optimization strategy

Load position detection and validation on variable-phase contactless energy transfer desktops

A coil layout of wireless power transfer systems based on multicoil arrangement for underwater vehicles

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