Multi-load validity judgment method of wireless power supply system

Abstract

The invention relates to a multi-load validity judgment method of a wireless power supply system. The multi-load validity judgment method mainly includes the step of enabling an energy transmitting terminal to periodically broadcast system information, receive a response message of the energy transmitting terminal in real time, and verify a matching check code. If the matching check code is successfully verified, a load is judged to be an illegal load, the system gives an alarm, and the transmitted power is reduced to the halt power. If the matching check code is not successfully verified, the load is recorded as a legal load, the pick-up power is recorded, and the loss power is obtained by comparing a sum of the pick-up powers of the legal loads in a receiving period with the transmitted power. In the judgment time quantum, if the time number of the loss power is larger than that of a power threshold cannot reach a time number threshold value, the operation is repeated; otherwise, it is judged that illegal energy transmitting ends or illegal loads of the illegal energy transmitting ends exist, the system gives the alarm, and the transmitted power is reduced to the halt power. According to the multi-load validity judgment method, the occurrence that the identity authentication of the illegal loads is obtained depending on legal loads or disposable counterfeiting of authentication information of the illegal loads can be prevented, the electric energy can be picked up at the energy transmitting terminal, energy waste and potential safety hazards can be avoided, and the safety and the reliability of the system are improved.

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