Urals | Technology & innovation

Developed wireless charger for drones

26 Nov '21
Young researchers from the Perm Polytechnic University have developed a prototype of a platform that will provide wireless power transmission for drones, electric vehicles and robots. The device will significantly increase the duration of their work on a single charge.

The results of the research were published by the developers in the collection of materials of the IV International Scientific and Practical Conference “Energy and Automation in Modern Society”.
“Wireless power transmission technologies are constantly evolving, such “charges” are inexpensive and highly efficient. But these standards are designed for low voltages and are mainly suitable for charging mobile devices. We have proposed a development that will help increase the operating time of drones, robots and electric vehicles,” said Sergei Sterlazhnikov, a third-year student of the Department of General Scientific Disciplines of the Lysva branch of the Perm Polytechnic.
In many areas for monitoring objects and other purposes are used by drones, which saves financial and time resources. But drone flights are limited, as a single charge lasts 20 minutes, taking into account photography. Recharging UAVs on special platforms with wireless power transmission systems can significantly increase their operating time, according to researchers from the Perm Polytechnic Institute. Now on the market there are practically no analogs that would provide “power” of rechargeable batteries without returning to a person.

Researchers have developed a device for wireless power transmission based on the FSFR2100 chip. It is distinguished by its high power and a large number of protections. The developers managed to simplify the design, improve the performance and reliability of the device. The maximum “charging” power without using a radiator reaches 200 W, and with a radiator - 450 W. It can operate at temperatures ranging from -40 to +130 degrees.
“Our development consists of two parts: a transmitter and a receiver. The receiver is assembled on the basis of a microcircuit that converts direct current into alternating current with a frequency of 150 kHz. Further, the voltage is transferred to the primary winding of the air transformer. Then, on the receiver winding, the voltage is transferred from the primary to the secondary winding, rectified, stabilized and fed to the BMS controller. Through it, you can charge the battery of the connected device,” - said the inventor.
In addition, the researchers have developed an LLC resonance transmitter that will ensure high efficiency of charging drones and robots. The technology can also be used to “power” electric vehicles, as well as in other areas where wireless chargers are used.

According to the approximate calculations of the developers, the cost of a set of a transmitter and a receiver will be no more than 8000 rubles. It can be built into the housing required by the customer.
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