A method for judging the legality of multiple loads in a wireless power supply system

Abstract

A method for judging multiple loads of a wireless power supply system, the steps of which mainly include: an energy transmitter: periodically broadcasting system information, receiving response information from an energy receiver in real time and verifying a matching check code. If the verification fails, it is judged to be an illegal load, the system will alarm and reduce the transmission power to the shutdown power; otherwise, it will be included in the legal load and record the pickup power, and the power loss will be obtained by adding the pickup power of the legal load in the receiving cycle and comparing it with the transmission power . During the determination period, if the number of times the loss power is greater than the power threshold does not reach the threshold, repeat the above operation, otherwise it is determined that there is an illegal energy receiving end and its load, the system will alarm and reduce the transmission power to shutdown power. This determination method can prevent illegal loads from obtaining identity authentication through legal loads or forging legal load authentication information at one time, so as to pick up electric energy from the energy transmitter, avoid energy waste and potential safety hazards, and increase system security and reliability.

Description

technical field [0001] The invention relates to a multi-load legitimacy judging method of a wireless power supply system. Background technique [0002] Wireless power supply (WPT) technology refers to the energy transfer between the grid and electrical equipment, which is carried out in a non-electrical contact mode through soft media (such as magnetic fields, electric fields, microwaves, lasers, etc.). Compared with the traditional wire contact power supply method, this new power supply method has the advantages of flexible power supply, safety and reliability, and low maintenance cost. The best solution for access. [0003] A typical structure of a WPT system generally consists of two parts, a completely electrically independent energy transmitter and an energy receiver. The relationship between the energy transmitter and the energy receiver can be one-to-one or one-to-many. The working principle of the WPT system is: the energy transmitting end converts the power freque...

AI Technical Summary

Problems solved by technology

The disadvantage of this type of load identification method is: when there are multiple energy receiving ends and their loads in the energy transmitting area, the illegal load will use the identity authentication obtained by any legal load to continuously pick up electric energy from the energy transmitting end: for For the heat-generating foreign objects (generally magnetic conductive metal blocks) strayed into the energy emission area, their own eddy current heating will cause energy waste and potential safety hazards; Due to the high power level of the energy transmitter, it is easy to cause damage or even burn out; for illegal loads that steal or steal electricity, after obtaining identity authentication by using the legal load in the energy transmitter area to "ride a ride", they will continue to The energy transmitting end picks up the electric energy, causing the "stealing" of the electric energy at the energy transmitting end

In addition, the existing WPT system load identification method usually only conducts identity authentication once. If the illegal energy receiving end and its load successfully forge the authentication information of the legal load, it will also lead to the occurrence of illegal phenomena such as stealing and stealing electricity. Transmission security and reliability need to be improved