3 ms·
They use multiple coils: "we can confirm is comprised of between 21 and 24 power coils". Presumably they detect where the device is and engage an appropriate c
by TrainedMonkey 8y ago
They use multiple coils: "we can confirm is comprised of between 21 and 24 power coils".
Presumably they detect where the device is and engage an appropriate coil. Quick search on amazon found a few charging pads with multiple coils.
- joombaga 8y ago21-24 is a weird range
- Drdrdrq 8y agoIt's a weird design.
- tcfunk 8y agoAs someone who knows basically nothing about designing electronic devices, my initial thought is 3 rows of 7 coils or 3 rows of 8 coils? This wouldn't make it a range, though, so much as an either/or situation.
- jakobegger 8y agoWould probably make more sense to choose some hexagonal pattern.
- tcfunk 8y agoOh, good point!
- jakobegger 8y agoThey use a grid of coils. By activating multiple adjacent coils, it behaves like one big coil. From a physics perspective it's really neat: the magnetic fields of opposing currents in adjacent wires should cancel. But the price you pay is that you have the charging current flowing through more length of wire, and more resistive losses (heat).
- toomuchtodo 8y agoPhased array inductive charging. Fascinating!