The world is electrifying...
Wireless charging is a key enabler for true autonomy for air, surface or subsurface robots
Inductive wireless power transfer theory
The critical relationship: [Inductive power transfer ∝ f² B²]
Next generation MHz-IPT
40 MHz²/85 kHz² = 200,000 times better coupling than the 2nd generation standard frequency
Higher frequencies f and magnetic flux densities B are greatly desirable
Inductive Power Projection Ltd are developing a novel hybrid metal/dielectric ring technology using MHz-frequency magnetic fields for wireless battery charging that circumvents the limitations of copper coils
We have worked with frequencies of up to 40 MHz while maintaining high efficiencies
These higher frequencies give significantly superior coupling between the transmitter and receiver coils
At MHz-frequency, it is possible to achieve much higher charging rates than for 85 kHz systems:
With much large distances between the transmitter and receiver
With high lateral displacement, particularly critical for e.g. drones landing on a rolling deck in high winds
Where high amounts of power (up to 100’s kW) transfer are required in these challenging situations
There are internationally allowed (ISM) frequencies at nominally 40.7 MHz, 27.1 MHz and 13.6 MHz
No comparable technology is commercially available at present, and as far as we are aware nothing similar is under development