Inductive chargers are targeted for battery charging of electric vehicles (EV), mobile phones, digital cameras, mp3 players, and other handheld electronics devices. Inductive charging uses the electromagnetic field to transfer energy between two objects. A charging station sends energy through inductive coupling to an electrical device, which stores the energy in the batteries. Because there is a small gap between the two coils, inductive charging is one kind of short-distance wireless energy transfer.

Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical current to charge the battery. The two induction coils in proximity combine to form an electrical transformer. Greater distances can be achieved when the inductive charging system uses resonant inductive coupling.

Inductive charging is the transmission of electrical energy from a power source to an electrical load without interconnecting wires. Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous, or impossible.

Advantages of Inductive Charger

  • Inductive charging would completely eliminates the existing high-tension power transmission line cables.
  • Inductive charging eliminates the power losses in cables.
  • Inductive charging carries a far lower risk of electrical shock, when compared with conductive charging, because there are no exposed conductors.
  • The cost of transmission and distribution become less and the cost of electrical energy for the consumer also would be reduced. The power could be transmitted to the places where the wired transmission is not possible.
  • Inductive charging makes charging mobile devices and electric vehicles more convenient, rather than having to connect a power cable, the unit can be placed on or close to a charge plate.

Disadvantages of Inductive Charger

  • Main disadvantage of Inductive charging is its lower efficiency and increased resistive heating in comparison to direct contact.
  • Implementations using lower frequencies or older drive technologies charge more slowly and generate heat for most portable electronics.
  • Inductive charging also requires drive electronics and coils that increase manufacturing complexity and cost.