This demo shows wireless energy transfer between Tesla coil and metal plates ( alu foil ) through the electric field.
Tesla coil generates a high-frequency high voltages. This voltage creates a strong oscillating electric field in its surroundings and induces an alternating potential on the receiver plate ( electrostatic induction ).
1. Aluminum plate is close to the coil L1
Capacity CTA + CLP enables capacitive coupling between the coils L1 and aluminum plate
CTA – capacity between the top load and aluminum plates
CLP – capacity between coil and aluminum plates
By changing the distance between L1 and aluminum plates, also changes the capacitance CTA + CLP, which significantly affect the wireless power transmission.
2. Top load is at a greater distance from the coil L1
Since the coil away from the aluminum plate, capacity CLP between the coil and aluminum plates has almost no effect.
It is also the inductive influence coils L1 fully eliminated. This and the previous experiment clearly shows that the wireless transmission of energy is fully implemented using capacitive coupling.