Imperial College of Technology announced on October 20 that the team successfully used wireless charging technology to allow the drone to be charged while in flight.
Wireless charging, also known as non-contact inductive charging, uses near-field sensing, ie inductive coupling, to transfer energy to a powered device by a power supply device. Since the charger and the consumer are inductively coupled to transfer energy, there is no need to use a wire connection between the two. This technology has been developed for many years, but has not been applied to flight carriers such as drones.
In order to carry out the experiment, Imperial College's team purchased a small four-axis drone and modified its electronic components. At the same time, the battery was removed and a coil of copper foil was wound around the fuselage as a receiving antenna. In addition, they have created a special base that is connected to electronics and power to form an electromagnetic field.
According to reports, since the electronic components of the drone have been calibrated, the frequency is the same as the electromagnetic field formed by the ground device. Therefore, it is only necessary to place the drone in the magnetic field, and the AC voltage can be introduced into the drone without wires. The copper foil receiving antenna is then efficiently converted to a DC voltage via the onboard electronics to drive the drone to fly. Even if it is flying in the air, as long as it is still in the magnetic field, you can get the power supply.
Currently, this technology is still in the experimental stage. The team only allowed the drone to charge in a flight at a distance of 10 cm above the ground device that generated the magnetic field, but they expected it to be developed for a further year or so.
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