Wireless power transmission system and its control method during load switching

A wireless energy transmission and electric energy technology, applied in circuit devices, electrical components, etc., can solve problems such as abnormal state, not a stable constant current source or constant voltage source, system operation, etc., and achieve the effect of suppressing severe fluctuations
CN106410987BActive Publication Date: 2019-03-29QINGDAO LU YU ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO LU YU ENERGY TECH CO LTD
Publication Date
2019-03-29

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Abstract

The present invention proposes a wireless energy transmission system and a control method for load switching thereof. In the invention, the MCU at the receiving end collects the output voltage of the rectifying and filtering circuit at the receiving end in real time, and judges in real time whether the load is switched and whether the load is switched based on the amplitude of the output voltage change. According to this, the operating frequency of the system is adjusted to quickly jump to a new resonant operating frequency, so that the system can quickly return to the new resonant state, thereby suppressing the sudden change of the voltage after rectification, so as to quickly reach the re-stabilized state of the system. The invention can effectively prevent the excessive fluctuation of the rectified voltage caused by the load change of the wireless receiving end, and improves the working stability of the wireless energy transmission system.
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Description

technical field

[0001] The invention belongs to the field of wireless power transmission, and in particular relates to a load switching control method in a wireless power transmission system. Background technique

[0002] In recent years, wireless charging technology has developed rapidly. Because of its non-contact, wire-free connection, and convenient operation, it has attracted much attention, and various wireless charging products have also come out one after another. As its wireless charging technology matures and its application fields become more and more extensive, power improvement and better user experience are becoming more and more important.

[0003] The existing wireless charging system, as a whole, includes two parts: the wireless energy transmitter and the wireless energy receiver, and the wireless energy transmitter and the wireless energy receiver transmit energy through a magnetic field, and there is no wire connection between the two. To obtain the statu...

Claims

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