Resonant inductive coupling

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2025-01-07 05:30:06

Resonant inductive coupling or magnetic phase synchronous coupling[ 4] [ 5] is a phenomenon with inductive coupling in which the coupling becomes stronger when the "secondary" (load-bearing) side of the loosely coupled coil resonates.[ 5] A resonant transformer of this type is often used in analog circuitry as a bandpass filter. Resonant inductive coupling is also used in wireless power systems for portable computers, phones, and vehicles.

Various resonant coupling systems in use or are under development for short range (up to 2 meters)[ 6] wireless electricity systems to power laptops, tablets, smartphones, robot vacuums, implanted medical devices, and vehicles like electric cars, SCMaglev trains[ 7] and automated guided vehicles.[ 8] Specific technologies include:

The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator.[ 10] 　However, this type of system radiates most of its energy into empty space, unlike modern wireless power systems which waste very little energy.