Electromagnetic Induction
This is the most common way of working for wireless chargers, which uses the principle of electromagnetic induction to generate current through electromagnetic induction between the primary and secondary coils, thereby achieving the transfer of energy in space; The implementation of this wireless charger has been promoted by the Wireless Power Alliance.
Radio Wave
Radio wave is a more mature wireless charging method of wireless charger at this stage, its working principle is to use a miniature efficient receiving circuit to capture radio waves in space, and then convert electromagnetic energy into stable electrical energy. Companies already claim to be able to wirelessly charge electronic devices smaller than a cell phone a few meters away.
Electromagnetic resonance
This is a wireless charging technology that is still in the research and development stage, this technology is mainly researched by a team led by a physics professor at the Massachusetts Institute of Technology in the United States, Intel engineers use this technology as a basis, and achieved a 60-watt light bulb about 1 meter away from the power supply, and has a transmission efficiency of 75%. Intel's engineers say the next goal will be to use this wireless charging technology to charge modified laptops. However, in order to achieve this goal, it is also necessary to solve the interference and influence of electromagnetic fields on other components in the computer.
