Wireless power transmission (WPT) is the efficient transmission of electrical power from one location to another without the need of cables or any other material.
This technique can be employed in cases where traditional cables are prohibitively expensive, inconvenient, harmful, undesirable (or) unattainable.
It can also be employed in applications that require fast or continuous energy delivery. This is new technology that the world will eventually adopt.
Nikola Tesla experimented with pulsed wireless energy transfer in the year 1899.
Tesla’s Magnifying Transmitter - an early type of Tesla Coil with a diameter of 16 meters could broadcast tens of thousands of watts wirelessly.
Wireless power techniques are divided into two categories:
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Non-radiative and
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Radiative.
Near field or non-radiative methods transfer power by magnetic fields using inductive coupling between wire coils (or) electric fields utilizing capacitive coupling between metal electrodes.
Inductive coupling is the most used wireless technique.
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