Wireless power transfer (also known as Inductive Power Transfer) involves the transmission of energy from a power source to an electrical load without connectors, across an air gap. The basis of a wireless power system involves essentially two coils a transmitter and receiver coil. The transmitter coil is energized by alternating current to generate a magnetic field, which in turn induces a current in the receiver coil. Wireless Power is the transmission of an electrical current from a power source to a receiving device without the use of a physical connection. The electrical current is then used to power electrical components or the battery of the receiving device.
The basics of wireless power involves the transmission of energy from a transmitter to a receiver via an oscillating magnetic field.To achieve this, Direct Current (DC) supplied by a power source, is converted into high frequency Alternating Current (AC) by specially designed electronics built into the transmitter.The alternating current energizes a copper wire coil in the transmitter, which generates a magnetic field. Once a second (receiver) coil is placed within proximity of the magnetic field, the field can induce an alternating current in the receiving coil.Electronics in the receiving device then converts the alternating current back into direct current, which becomes usable power.