How does wireless battery charging work? Like for cellphones
In: Technology
Basically the charger panel is taking electricity from the wall and projecting it out at s magnetic wave. The phone the has a component that converts the magnetic field into electric current which goes back into the phone. There a lot more physics stuff to this by the way, I’m skipping over a lot for the format of this sub
What others are describing is summed up in an equipment called a [transformer](https://i.pinimg.com/originals/44/20/b2/4420b294f25ff197e29f4d2cee65656a.jpg). A primary coil that has electricity flowing in it produces an electromagnetic field. A secondary coil that is close enough to the field will have an electric current induced by the field. Wireless charging is fundamentally this. A transformer uses an iron core to efficiently transfer the EM field from primary to secondary wires, but other than that the concepts are the same.
Electricity and magnetism are linked together. With the right equipment you can convert one into the other. So the wireless charger turns electricity from the wall into magnetism, then the phone turns the magnetism back into electricity to charge the battery.
An wound coil uses induction to transmit energy to another wound coil, it is actually quite similar to what is already in induction stoves. If you recall an experiment back in elementary school where you wrap a nail with a coil, and connect a battery, the idea there is to create a electro magnet through induction. This applies the same principals to transfer energy. I would also like to add that many devices already transmit electromagnetic waves or radio waves which is energy but when we capture it its to listen to music or transmit data. In this case it’s just to transmit energy.
I think its like an induction cooker but it chargers your phone instead of heating a pan . A pan has really resistive bottom element so it heats alot. phones most likely have a low resistance coil so it wont heat up as much while still having current flowing
Latest Answers