Period 1

D1.1 “Initial feasibility assessment”
The deliverable describes the target industry and the state-of-the-art they are applying. It analyses the strategic fit of the project developments to the market and its environment. The concluding market assessment on how the market needs are addressed and how the project will create impact on the industry will be included in D7.4 Final plan and report on Exploitation, Dissemination & Communication activities.

D3.2 “Discrete / integrated power semiconductors characterized”
Measurement results, modelling and verification of models of the selected power semiconductors summarized in an internal datasheet and / or CAD model.

D7.3 “Updated plan and initial report on Exploitation, Dissemination & Communication activities”
This report includes updates on the communication kit, the exploitation, dissemination and communication plans as well as initial reports on the executed activities. It furthermore includes a first view on the market, its opportunities and on the target audience.

Period 2

D3.5 “Final documentation of (power) semiconductors under operation in the demonstrators”
Operation of semiconductors documented under realistic operating conditions in the field, e.g. under EMC and temperature constraints through electromagnetic and thermal measurements.

D4.7 “Final verification of SIPs under field operating conditions”
A final experimental verification through laboratory measurements of the PSIPs under realistic operation conditions, i.e. in the demonstrator.

D7.4 “Final plan and report on Exploitation, Dissemination & Communication activities”
This report includes an update of the communication kit and a final plan on the exploitation, dissemination and communication activities as well as reports on the executed activities. It furthermore includes a view on the market, its opportunities and on the target audiences.

„The LEDLUM” project uses Zenodo as its open research data repository, in order to grant Open Access to scientific publications. Check out our Zenodo community LEDLUM!

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2018

expand Resonant Full-Bridge Synchronous Rectifier Utilizing 15 V GaN Transistors for Wireless Power Transfer Applications Following AirFuel Standard Operating at 6.78 MHz

Christopher Have Kiaerskou Jensen, Frederik Monrad Spliid, Jens Christian Hertel, Yasser Nour, Tiberiu-Gabriel Zsurzsan, Arnold Knott, IEEE APEC 2018, San Antonio, Texas, USA. March 2018.

Abstract: Connectivity in smart devices is increasingly realized by wireless connections. The remaining reason for using connectors at all is for charging the internal battery, for which wireless power transfer is an alternative. Two industry standards, AirFuel and Qi, exist to support compatibility between devices. This work is focusing on the AirFuel standard, as it is operating at a higher frequency (6.78 MHz), than the Qi standard, and therefore allows smaller passive components, including the coupling coils. Whereas gallium-nitride (GaN) devices are being widely used on the transmitter (Tx) side, this work uses low voltage GaN transistors on the receiver (Rx) side to allow synchronous rectification and soft switching, thereby achieving high efficiency. After analyzing adequate Class-DE rectifier topologies, a Class-DE full-bridge 5 W rectifier using 15 V GaN transistors are designed and implemented. The experimental results show an efficiency above 80 % over a wide operating range and a peak efficiency of 89 %, at an arbitrary alignment of Tx and Rx coils with 3 cm distance between them.

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