What is Wireless Energy Transfer?

Wireless energy transmission or wireless power transmission refers to a process in which energy is transmitted from an energy source to an electrical load. This process is not traditionally done by wire, but is achieved by wireless transmission.

Wireless energy transmission

Wireless energy transmission or wireless power transmission refers to a process in which energy is transmitted from an energy source to an electrical load. This process is not traditionally done by wire, but is achieved by wireless transmission.

Chinese name

Infinite energy transfer

Foreign name

Wireless energy transfer

History of wireless power transmission

The idea of transmitting energy through a beam is not new. As early as 1891, Tesla's wireless power transmission experiments at Wardenclyffe proved that neon lights can be lit 25 miles away without wires.

The United States Federal Communications Commission (FCC), founded in 1934, uses the 2.4-2.5GHz frequency band as a reserved frequency band in the industrial, scientific, and medical (ISM) field, so that people can conduct significant scientific research in this range. During World War II, the technology of using magnetrons to convert electrical energy into microwaves was successfully developed. But the method of converting microwaves back to current was not discovered until 1964, during which William C. Brown successfully verified a silicon rectifier diode antenna that could convert microwaves into current.

In 1968, Peter Glaser put forward the idea of using microwave to transmit power from solar-powered satellites to the ground at a power level far below international safety standards; and on October 7, 1987, a fixed high-altitude relay platform In a SHARP experiment, a small aircraft relied on energy provided by an RF beam to fly through the air. This flight is the first of its kind in the International Aviation Alliance.

Finally, in 1995, NASA established a 250MW solar power system (SPS) that integrates research, technology and investment learning, while Japan's goal is to establish a low-cost demonstration model by 2025. ^[1]

Classification of existing energy transfer technologies

Radiation technology: Receive the radiant energy that has not been lost in the air through a unique receiver, convert it into electrical energy, and store it in a nearby battery; Magnetic field resonance technology: When two objects achieve resonance at the same frequency, Wireless energy transmission will be realized; Inductive coupling technology: energy transmission through relatively direct contact, such as placing the machine on a mat for charging; "harvest" energy from the environment: Conversion of thermal, light and vibrational energy into required energy