Dynamic load switching control method and system

Abstract

The invention discloses a dynamic load switching control method and system. A transmitting terminal controls a resonance circuit to work in a soft switching mode; a receiving terminal sends communication information to the transmitting terminal when being to perform load switching; the transmitting terminal adjusts a transmitting terminal control parameter according to the communication information when receives the communication information sent by the receiving terminal and controls the resonance circuit to work in a hard switching mode within a preset time period; a receiving terminal load achieves corresponding action switching within the first preset time period; the communication information comprises a switching action command to be executed by the load and the preset time period refers to the time from the transmitting terminal receives the communication information to the ending of the hard switching control mode. The dynamic load switching control method and system eliminates influences to a resonance system when the receiving terminal load suddenly changes due to control of the resonance circuit working mode through a soft switching and hard switching combined mode and improves the system stability and safety under the condition that the system efficient transmission is guaranteed.

Description

technical field [0001] The invention relates to the field of wireless power transmission, in particular to a control method and system for dynamic load switching. Background technique [0002] The working frequency of the wireless power transmission system has the following two control methods: soft switch control and hard switch control. Soft switch control refers to the use of semiconductor components such as high-power thyristors to control electrical appliances to work in zero-voltage switching or zero-current switching. The system The operating frequency tracks the operating frequency of the resonant system in order to achieve high system efficiency; hard switching control refers to the working mode in which the device switches when the voltage is not zero or the current is not zero. The system switching loss is large, at the expense of system working efficiency. Improve system stability. [0003] When the frequency of the resonant system is simply controlled by the so...

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Problems solved by technology

[0003] When the frequency of the resonant system is simply controlled by the soft switching control method, the resonant system will be affected by the sudden change of the load when the dynamic load is switched or the load power changes suddenly, which will cause the system to work out of tune, cause the system to work unstable, and seriously cause component damage

When the frequency of the resonant system is simply controlled by the hard switch control method, the system efficiency is lower than that of the soft switch control, and the loss of the switch tube is large, which affects the service life of the main components of the system

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