A Study on Magnetic Field Repeater in Wireless Power Transfer

Ahn, Do-Seob; Hong, Songcheol

doi:10.1109/tie.2012.2188254

Cited by 308 publications

(168 citation statements)

References 34 publications

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“…Inductive power transfer to clothing has been proposed before [3], where energy was required by the garment itself. To realise power sharing on and between garments we considered using relay coils [4] or coupled resonators [5], as shown in Fig. 1.…”

Section: Feed Coil Architecturementioning

confidence: 99%

“…Multiple feed coils can be cascaded together to bridge the boundaries between garments, though this significantly increases the complexity of the system and an appropriate distance between the coils must be established to achieve an acceptable coupling between entry and exit coils (in an analogous fashion to relay coils [4,5]). Multiple feed coils used to bridge the boundary between garments and create a noncontact power transfer method between garments are shown The circuit behaviour of a single feed coil can be analysed by considering the coupling between the transmit coil to feed coil, feed coil to receive coil and transmit coil to receive coil as demonstrated in [7].…”

Section: Feed Coil Architecturementioning

confidence: 99%

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Garment level power distribution for wearables using inductive power transfer

Worgan

Fraser

2016

2016 9th International Conference on Human System Interactions (HSI)

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Section: Feed Coil Architecturementioning

confidence: 99%

Section: Feed Coil Architecturementioning

confidence: 99%

Garment level power distribution for wearables using inductive power transfer

Worgan

Fraser

2016

2016 9th International Conference on Human System Interactions (HSI)

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“…The equivalent circuit of the proposed system shown in Fig. 5 is derived by applying the equivalent circuit of the repeater coil in (22)- (23). The repeater coil was invented in order to extend the transmission distance (22) (23) .…”

Section: Derivation Of Equivalent Circuitmentioning

confidence: 99%

“…5 is derived by applying the equivalent circuit of the repeater coil in (22)- (23). The repeater coil was invented in order to extend the transmission distance (22) (23) . In the wireless power transfer system with a repeater coil, the power supply, which has the inner impedance Z 01 , is connected to the coil A.…”

Section: Derivation Of Equivalent Circuitmentioning

confidence: 99%

Galvanic Isolation System with Wireless Power Transfer for Multiple Gate Driver Supplies of a Medium-voltage Inverter

et al. 2016

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In this paper, a gate driver supply, which supplies power to multiple gate drivers, is demonstrated. Robust isolation is required in the gate drive supplies of a medium-voltage inverter in order to drive high-voltage switching devices such as insulated-gate bipolar transistors. The proposed isolation system achieves isolation with transmission coils mounted on printed circuit boards. Furthermore, the isolation system transmits power from one transmitting board to six receiving boards. In the conventional system, the number of receivers is limited to one. In contrast, multiple receivers are acceptable in the proposed system. These characteristics help reduce the of the isolation system for the gate driver supplies.This paper presents the fundamental characteristics of the isolation system. The equivalent circuit of the proposed system can be derived by applying the equivalent circuit of a wireless power transfer system with a repeater coil. In addtion, a design method for the resonance capacitors is mathematically introduced using the equivalent circuit. It is verified that an isolation system with multiple receivers can be designed using the same resonance conditions as an isolation system with a single receiver.Moreover, the isolation system is experimentally demonstrated. It is confirmed that the isolation system transmits power with a maximum efficiency of 46.9% at an output power of 16.6 W beyond an air gap of 50 mm with only printed circuit boards.

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“…The resonator will receive magnetic field from the transmitter and then sending the magnetic field to the receiver. This concept is able to enhance the transmission power at a longer distance [2].…”

Section: Introductionmentioning

confidence: 99%

A study on Relay Effect via Magnetic Resonant Coupling for Wireless Power Transfer

et al. 2016

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Abstract. Wireless power transfer (WPT) transmits electrical energy from a power source to an electrical load wirelessly or without any conductors. The capability of WPT to transmit the energy is limited. Therefore, a relay was introduced to increase the distance of the WPT capabilities. The effect of the relay has been investigated to extend the energy transfer distance. The effect of relay was demonstrated by placing a relay coil between transmitter and receiver, relay biased to transmitter and placing two relay coils in the designed system. Experimental results are provided to prove the concept of the relay effect. The power transmission efficiency can be achieved up to 75% at 1 meter distance.

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A Study on Magnetic Field Repeater in Wireless Power Transfer

Cited by 308 publications

References 34 publications

Garment level power distribution for wearables using inductive power transfer

Garment level power distribution for wearables using inductive power transfer

Galvanic Isolation System with Wireless Power Transfer for Multiple Gate Driver Supplies of a Medium-voltage Inverter

A study on Relay Effect via Magnetic Resonant Coupling for Wireless Power Transfer

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