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Main ways of wireless power transmission

Author: Tanssion Date: 2022-11-24 Hits: 56
There are three main ways of wireless power transmission: electromagnetic induction, electromagnetic resonance, and electromagnetic radiation.

Electromagnetic resonance
This is a new wireless charging technique that is currently in its early stages of development. This technology is mainly researched by a team led by a professor of physics at the Massachusetts Institute of Technology. Intel’s engineers use this technology as a basis to achieve a distance of about 1% from the power supply. A 60-watt bulb is lit up about a meter away, and it has a transmission efficiency of 75%. Intel engineers stated that the next goal will be to use this wireless charging technology to charge modified laptops. However, in order to reach this goal, the interference and influence of electromagnetic fields on other computer components must be resolved.

Radio wave
Radio waves are a relatively mature wireless charging method for wireless chargers at this stage. Its working idea is to capture radio waves in space using small and efficient receiving circuits, then convert electromagnetic energy into steady electrical energy. There are currently firms claiming to be able to charge electrical gadgets smaller than a cellular phone wirelessly from a distance of a few meters.

Electromagnetic induction
This is the most common working method of wireless chargers. It uses the principle of electromagnetic induction to generate an electric current through electromagnetic induction between the primary and secondary coils, so as to realize the transmission of energy within the space. The Wireless Charging Alliance has advocated for the use of this wireless charger.


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