Method for measuring resonant frequency of coil and applicable to wireless power transmission system

Abstract

The invention belongs to the technical field related to new technology on electrical engineering, and discloses a method for measuring the resonant frequency of a coil and applicable to a wireless power transmission system. The method comprises the following steps that (1) a measuring system is provided, the measuring system comprises two identical and spaced single-wire coils which are used as atransmitting coil and a receiving coil separately, the transmitting coil is connected with an alternating current power supply, and the receiving coil is connected with a load, meanwhile, a coil to bemeasured in the wireless power transmission system is placed between the transmitting coil and the receiving coil, and the distance between the coil to be measured and the transmitting coil is equalto the distance between the coil to be measured and the receiving coil; and (2), a variation curve of scattering parameter module values of the measuring system with the frequency of the alternating current power supply is obtained, wherein the frequency of the alternating current power supply corresponding to the peak value of the variation curve is the resonant frequency of the coil to be measured. The method for measuring the resonant frequency of the coil and applicable to the wireless power transmission system improves the accuracy and efficiency and simplifies the analytical method.

Description

technical field [0001] The invention belongs to the technical field related to electrotechnical technology, and more specifically relates to a coil resonance frequency measurement method suitable for a wireless power transmission system. Background technique [0002] With the penetration of electrical automation into all aspects of people's production and life, although the traditional "wired" power transmission method has been widely used, there are disadvantages such as potential safety hazards and damage to the appearance, which can no longer meet the application requirements. Therefore, wireless power transfer (WPT) technology has attracted widespread attention of many researchers and has become a major research hotspot in the current era. WPT technology can avoid the shortcomings of traditional "wired" transmission, and has practical application value and broad application prospects in the fields of portable communication, smart home, transportation, medical equipment, ...

AI Technical Summary

Problems solved by technology

The measurement method is applicable to the measurement of the resonant frequency of the coil in the wireless power transmission system, simplifies the analysis method, overcomes the shortcomings of the traditional measurement method in the case of high frequency, such as large error and complicated test of the resonant frequency of the coil, and is suitable for Coils of different frequencies and sizes can also effectively measure their resonant frequencies, laying a good foundation for the practical application of wireless power transmission in the future

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