Parallel type fractional autonomous wireless power transmission system

Abstract

The invention discloses a parallel type fractional autonomous wireless power transmission system. The system comprises a fractional order transmitting circuit and a fractional order receiving circuit;the fractional order transmitting circuit comprises primary side fractional order inductance coils connected in series and a primary side fractional order capacitor with an order greater than 1, wherein the primary side fractional order capacitor with the order greater than 1 has the property of negative resistance to provide energy for the system; and the fractional order receiving circuit comprises a secondary fractional order inductance coil, a secondary fractional order capacitor and a load which are connected in parallel. The primary side fractional order capacitor with the order greaterthan 1 and the inductance coils and the receiving circuit form an autonomous system so that the primary side fractional order capacitor supplies energy to the circuit, and the working frequency and the capacitance value of the primary side fractional order capacitor when the order is fixed to automatically follow the change of the parameters of the system to achieve the constant transmission efficiency and output efficiency of the system and solve the problems that the decreased efficiency of the unstable output power of the traditional wireless power transmission system caused by the resonant frequency deviation and the change of the coupling coefficient.

Description

technical field [0001] The present invention relates to the technical field of wireless energy transmission or wireless power transmission, in particular to a parallel fractional order autonomous wireless power transmission system. Background technique [0002] In recent years, power transmission technology based on near-field magnetic coupling has been widely developed. Because its transmission distance can range from millimeters to tens of centimeters, or even meters, and it is safe and efficient, it is considered to be a promising alternative to wired transmission. . Early near-field wireless transmission can only be tuned at a specified distance to achieve efficient transmission. Later, the use of frequency tracking technology and PT symmetry enables the wireless power transmission system to achieve stable power transmission at different distances. Traditional near-field wireless power transmission based on frequency tracking and PT symmetry can only maintain the highes...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and proposes a parallel fractional-order autonomous wireless power transmission system, which uses the primary-side fractional-order capacitance with an order greater than 1, an inductance coil, and a receiving circuit to form an autonomous system, so that the original The side fractional order capacitor not only provides energy for the circuit, but at the same time, when the order is fixed, the operating frequency and capacitance of the original side fractional order capacitor can automatically follow the system parameter changes, so as to realize the constant system transmission efficiency and output power, which solves the problem of traditional wireless power transmission. The problem of system efficiency drop or output power instability caused by resonant frequency shift and coupling coefficient change

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