Wireless charging initially uses Alternating Current (AC). The process relies on electromagnetic induction, where AC flowing through a coil creates the magnetic field needed for wireless power transfer.
Here's a breakdown:
Wireless charging utilizes electromagnetic induction to wirelessly transfer power to devices. The charging station uses a coil to create a magnetic field. This process needs Alternating Current (AC).
| Stage | Current Type | Description |
|---|---|---|
| Initial | AC | AC passes through the charging station's induction coil, creating a magnetic field. |
| Transmission | Electromagnetic Induction | Magnetic field is generated by AC and transmits energy to the receiving device. |
| Final | DC (Usually) | The receiving device typically converts the induced AC back to DC to charge the battery. |
While the initial current in the charging station is AC, it's crucial to understand that the device being charged usually requires Direct Current (DC). Therefore, a conversion often occurs within the receiving device to change the induced AC voltage back to DC before charging the battery.
