High frequency wireless charging

26th March 2021
Caroline Hayes


Inductive resonant power transfer technology extends wireless charging, says NuCurrent, as it introduces NuEva HF development platform.

The platform offers patented high frequency (HF) wireless charging, boosting power and range to bring wireless charging to a range of new applications, says the company. It delivers up to 300W and can charge multiple devices. 

The NuEva HF development platform is based on inductive resonant power transfer. According to the company, this brings new functionality and benefits compared to RF-based methods and inductive-based charging methods, like Qi. Both of these charging technologies are not suitable for some product categories, says NuCurrent CEO, Jacob Babcock.

“NuEva HF delivers power levels about x1,000 higher than RF and it provides positioning flexibility about x100 that of Qi, plus it offers the ability to charge multiple devices simultaneously,” he said.

It operates at 6.78MHz, which is the same frequency as the standard developed by the AirFuel Alliance. This high-frequency method of power transfer delivers multi-device charging from a single transmitter, greater spatial freedom and more flexibility in the position of the device to be charged as well as high system efficiencies and uniform charging zones, says NuCurrent.

Among the proprietary technologies developed by NuCurrent are surface repeater technology which extends the charging surface areas via inexpensive passive electronics driven from a single power source and multi-layer, multi-turn (MLMT) antennae that increase efficiencies and lower thermals. There are also proprietary methods for cost-effective EMI mitigation and in-band communications for reduced cost system, compared to Bluetooth. Other innovations are options for power transfer through a selection of materials (e.g. metal or tissue)

NuEva HF can be used for a range of new applications, advancing inductive resonant power transfer, says Babcock. It can be used in gaming and robotics as well as personal transportation and medical devices.



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