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Wireless power transfer (WPT) system has been introduced to many applications. However, it allows very limited misalignment of the power receiver relative to the power transmitter, which is not suitable for some applications such as electric vehicle (EV) wireless charging. This paper presents methods to improve output stability over large misalignment from the perspective of compensation topology...
In order to improve the distance, power, and efficiency of power transfer in wireless power transfer system under the weak coupling condition, a 3-coil weak coupling power transmission model was created. A new match adjustment method of the Impedance network is raised based on the usage of impedance transformation of the relay. Adjusting the distance of the coil gives the maximum efficiency on the...
Dynamic magnetic coupling resonate wireless power transfer (WPT) system with single magnetic pole track allows very limited lateral migration of the power receiver relative to the power supply rail. The multi-pole rail improves the issue of lateral migration effectively, but when the receiver moves along the rail, the null points make it difficult to be applied to the equipment which carries none...
In this letter, a novel two-coil magnetic communication method based on magnetic resonant coupling and frequency divarication is proposed. The half-power decay is employed to derive the boundary condition of double 3-dB bandwidths. Moreover, the expressions of load power, power ratio, and communication capacity are deduced based on the mutual inductance theory. The theory proves that there exists...
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