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A method for calculating the resonance frequency of a magnetically coupled wireless power transfer system

A technology of wireless energy transmission and resonant frequency, applied in the direction of circuit devices, electrical components, etc., can solve the problems of low energy efficiency and energy transfer direction

Active Publication Date: 2020-07-07
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes a method for calculating the resonance frequency of the magnetically coupled wireless power transmission system. By revealing the resonance mechanism of the MC-WPT system, a mathematical description between the resonance point and the system parameters is established to solve the problem of frequency splitting. Low energy efficiency and energy transfer directionality

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  • A method for calculating the resonance frequency of a magnetically coupled wireless power transfer system
  • A method for calculating the resonance frequency of a magnetically coupled wireless power transfer system
  • A method for calculating the resonance frequency of a magnetically coupled wireless power transfer system

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] Such as figure 1 The equivalent circuit diagram of the arbitrary-order multi-input multi-output wireless power transmission system shown, wherein n circuits are represented by subscripts 1, 2, ..., n in turn. R pm Is the internal resistance of the coil, L m Is the coil self-inductance, C m Is the corresponding compensation capacitor, u m To compensate the voltage across the capacitor, M mj Is the mutual inductance between coil m and coil j, i m Is the current of circuit m, R Lm Is the load of circuit m, v m Is the power supply for circuit m. v m And R Lm Cannot exist at the same time, when v m ≠0 and R Lm =0, circuit m is a transmitting circuit, otherwise v m = 0 and R Lm ≠0, circuit m is a receiving circuit, when both are 0, circuit...

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Abstract

The invention discloses a resonant frequency calculation method for an MC-WPT (magnetic coupling wireless power transfer) system. Resonant frequency is solved rapidly by establishing a standard statespace model of an arbitrary-order multi-transmitting, multi-relay and multi-receiving MC-WPT system. Besides, analytic current of any oscillation circuit can be calculated. By solving the resonant frequency, the system can be in the maximum energy efficiency state according to the systematic work guideline.

Description

Technical field [0001] The present invention relates to the technical field of wireless energy transmission, in particular to a method for calculating the resonance frequency of a magnetic coupling wireless power transmission system. Background technique [0002] Magnetic coupling wireless power transfer (MC-WPT) realizes the non-electrical connection transmission of electric energy from the power supply side to the electric equipment side, completely free from the shackles of wires, and has broad market prospects and scientific research value. It has been widely used in household appliances, biomedicine, electric vehicles and other fields. As one of the inevitable development trends of MC-WPT technology, the multi-transmit, multi-relay, and multi-receive wireless power transmission system has attracted great attention from domestic and foreign researchers in recent years. [0003] However, most of the MC-WPT systems at this stage are based on the resonance coupling principle prop...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12
CPCH02J50/12
Inventor 孙跃唐春森叶兆虹左志平廖志娟
Owner CHONGQING UNIV