Design method of magnetically coupled resonance high-efficiency power transmission coil

Abstract

The invention discloses a magnetic coupling resonance high-efficiency power transmission coil design method, which belongs to the technical field of wireless power transmission devices. The method provided by the invention comprises the steps that the size of a unidirectional coil on a receiving end is determined according to a charging target, and the size of a forward coil and a reverse coil on a transmitting end is determined according to a power supply; the turns ratio between the forward coil and the reverse coil on the transmitting end is determined according to a mutual inductance formula; the number of turns of the reverse coil on the transmitting end is adjusted; an appropriate number of turns is selected according to the flatness of the curve of the mutual inductance between the forward and reverse series coils on the transmitting end and the unidirectional coil on the receiving end, wherein the curve of the mutual inductance changes with the transmission distance; and two adjustable capacitors C1 and C2 are used to tune the forward and reverse series coils on the transmitting end and the unidirectional coil on the receiving end at the operating frequency. According to the invention, for short-distance, the forward and reverse series coils are used as the transmitting coils of a WPT / MRC system to effectively suppress the generation of a frequency splitting phenomenon; for long-distance, the forward coil is used as the transmitting coil of the WPT / MRC system to maintain high-efficiency transmission of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission equipment, and in particular relates to a design method of a magnetic coupling resonance high-efficiency power transmission coil. Background technique [0002] As a more flexible, convenient and safe energy transmission method, wireless power transmission has attracted widespread attention at home and abroad. So far, according to different energy transmission principles and distances, wireless energy transmission methods can be divided into three categories: [0003] The first type is electromagnetic induction, which is mainly used for wireless power supply of mobile devices. It is a safe, reliable and flexible power transmission technology, but its transmission distance is very short, about a few centimeters; [0004] The second type is the microwave type, which transmits and receives electromagnetic energy through the antenna, which has the advantages of long transmission di...

AI Technical Summary

Problems solved by technology

[0004] The second type is the microwave type, which transmits and receives electromagnetic energy through the antenna, which has the advantages of long transmission distance and high transmission power, but in the process of energy transmission, more complicated antenna alignment technology is required, and the microwave energy loss is large and the efficiency is high. Low, has serious harm to the human body, and is generally used in special occasions;

However, these additional circuits complicate the system and consume additional power

Images