A pair of two wireless power transmission system based on adaptive load identification and topology switching method

Abstract

The application discloses a kind of based on adaptive load identification one-to-two wireless power transmission system and topology switching method, belong to wireless power transmission technical field.The system includes one transmitting end and two independent receiving ends, transmitting end adopts fixed series compensation;Each receiving end includes receiving coil, rectification filter circuit, switchable compensation network etc.The method is that each receiving end microcontroller is calculated by running adaptive load identification algorithm based on sliding window statistical characteristics, real-time dynamic calculation light load and heavy load threshold, and is combined with hysteresis constraint and anti-jitter confirmation mechanism, according to voltage current sampling identification load state, system is driven according to under the condition of meeting minimum switching interval, and executes circuit switchable compensation network is automatically switched between series and parallel topology.The application realizes distributed autonomous control, need not communicate with transmitting end, and the average transmission efficiency of 1050Ω wide load range can reach 8284%, significantly better than fixed topology.

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