Test judgment method of influence on coexistence among multiple groups of systems by wireless power transmission system parameter

Abstract

The invention discloses a test judgment method of influence on coexistence among multiple groups of systems by a wireless power transmission system parameter. The method comprises the following steps:selecting the own parameters of a wireless power transmission system and parameters among multiple groups of systems, and analyzing test ranges of the parameters; testing magnetic field strength change of the wireless power transmission system in a certain range and the self-inductance and mutual-inductance parameters of the own primary secondary side coil of the wireless power transmission system through a control variable method, and testing magnetic field change when the inter-system distance is changed by changing the distance between a measurement point and the wireless power transmission system; and combining the magnetic field strength and the own coupling coefficient of the wireless system to obtain a new coefficient Q, and judging the influence on the inter-system coexistence bythe parameters; and selecting the parameter with low Q value as an advantage parameter so as to determine the wireless power transmission system with the minimum influence on the coexistence among multiple groups of systems. Through the method disclosed by the invention, the wireless power transmission system most suitable for the inter-system coexistence can be judged, and the model reference andthe method basis are provided for the construction of multiple wireless power transmission systems or large-scale wireless power transmission regions in the future.

Description

technical field [0001] The present invention relates to a method for judging the coexistence of parameters of a wireless charging system, in particular to a method for testing and judging the influence of parameters of a wireless charging system on the coexistence of multiple systems, and belongs to the problem of the coexistence of multiple sets of wireless charging systems in the technical field of wireless charging systems. . Background technique [0002] Currently, there are mainly two types of charging methods for electric vehicles: wired charging and wireless charging (Wireless Power Transmission, WPT). The wireless charging technologies suitable for electric vehicles mainly include electromagnetic induction and magnetic coupling resonance. Compared with electromagnetic induction, Magnetically-Coupled Resonant Wireless Power Transmission (MCR-WPT) has advantages in transmission distance and transmission efficiency, which can be realized by relying on induction, magnet...

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Problems solved by technology

[0003] In the practical application of MCR-WPT technology, due to the application of magnetic coupling technology, it will inevitably involve the problem of magnetic field. The scattered magnetic field may interfere with other electromagnetic systems. In the large wireless charging parking lot that may be built in the future, there must be multiple For wireless charging systems, if there is interference between each other and charging at the same time cannot be carried out, then the construction will be meaningless. To ensure the coexistence of multiple systems and determine the coil construction plan with the least impact, in order to ensure the infinite possibilities of the wireless charging system in the future

In the current construction work, there are many coil design schemes. Among these many coil designs, the influence of their design on the coexistence of other wireless charging systems has not been considered. Therefore, it is necessary to extract many parameters in the coil design and select Appropriate test range, through the control variable method, through the appropriate evaluation criteria to determine the impact of coexistence, to provide model reference and theoretical basis for the regionalization and centralization of multiple wireless charging systems in practice

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