How Wireless Charge Coils Work

How Wireless Charge Coils Work

A coil of wire coiled around an electromagnet or whatever it is produces electricity because the magnetic field it creates, whether it’s increasing or decreasing, causes electric charges to move in opposite directions and that generates a current.charge coils This is how a battery in your car or the coil in your vacuum cleaner produces energy, even though they both spin. Coils store energy into magnetic fields and those fields tend to oppose any change in current flow (a collapse of the magnetic field can generate an induced voltage that increases current flow). Capacitors, on the other hand, store energy into electrostatic fields and that energy is released slowly as current changes.

Wireless charging coils are used to inductively transfer energy between devices like cell phones, game machines, and wearables.charge coils They’re also used to charge electric vehicles so that you can drive with a full battery and not have to worry about plugging and unplugging the power cord. They’re rated by their inductance, self resonant frequency, saturation current and Q factor at a given frequency.

Inductive charging is much faster than using a cable and can be automated so that you don’t have to wait for someone to come along and connect or disconnect it for you.charge coils However, it does require a special electromagnetic coil that emits an alternating magnetic field to transfer the energy.

These coils are called transmitter and receiver coils and are designed with single or multiple windings in parallel and close proximity.charge coils They’re rated by their inductance, power transfer coefficient, and self resonant frequency at a given frequency. They’re also sized by their coreless and air-cored designs, as well as their primary and secondary winding leakage inductances.

Coils with a single winding are often called microchannel coils and are used in HVAC equipment, particularly residential heat pumps.charge coils They offer better heat transfer and use less refrigerant than traditional fin-and-tube coils. They’re also lighter, making them easier to handle and install. However, the smaller volume of refrigerant they hold can make it more difficult to charge an air conditioning system that uses them, as you need to be sure to fill it to the correct level and don’t let it overflow.

AKS manufactures stamped, wireless charging transmission and receiver coils for a variety of applications including car chargers, smartphones, game controllers and more. Our stamping and forming processes allow for thinner, lighter coils that provide superior performance and increased reliability. Contact us today to see how our custom antenna and coil solutions can support your next project.