| Since the advent of magnetic coupling resonance wireless power transmission(MCR-WPT)technology, more and more scholars at home and abroad are concerned and favor.In recent years, with the continuous development of WPT technology, the need for practical applications,the need for multi-receiver MCR-WPT system is also increasing. Therefore, it is a matter of concern that the power division of multi-receivers and the transmission efficient can be solved in a multi-receiver MCR-WPT system.According to the basic principle of MCR-WPT,the circuit model of the two receivers and the three receivers system is established when the cross coupling is considered or not,deduced the power and efficiency of expression, and extended to arbitrary receivers. In the multi-receivers MCR-WPT system, the power division expression is given first, through the analysis of the factors influencing the load on the power division,the receiver design symmetry to simplify the impedance matching method,so as to realize the power division,and the simulation verifies the correctness of the power division method based on the software of LTspice,and analyzed the influence of cross coupled to multi receiver system.By comparing several models of two receivers and three receiver of the MCR-WPT system, The receiver is placed on the same side of the transmitter and the two system models placed on both sides of the transmitter.The multi-receiver MCR-WPT system experiment platform is designed to realize the division of the power of 1:1 and 1:2 and 1:1:1 and 1:2:3 of the two receivers and the three receiver systems. The comparison test of the model verifies that the receiver has a better power transmission characteristic when placed on both sides of the receiver, and the receiver is placed on the same side of the transmitting coil, and is more suitable for with the near-range wireless power transmission. |
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