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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...
This paper focuses on the design of the magnetic coupler in the wireless charging system for electric vehicles. A solenoid type magnetic coupler is used for the better ability of magnetic coupling than the plate type magnetic coupler under the condition of mid-range wireless power transfer. The factors of coupling coefficient are analyzed in two kinds of ways, magnetic circuit theory and mutual inductance...
This paper present a method to estimate the output current or voltage in the primary-side of a two-transmitter inductive wireless power transfer system, which has been introduced to achieve the continuity of power transfer, without any direct measurement on the receiver coil and load conditions. The proposal can ensure the continuity and stability of charging in dynamic wireless power transfer system...
Wireless power transfer (WPT) systems with square shaped ferrite core are widely used in various applications because of its simplicity. However, it allows very limited lateral misalignment of the power receiver relative to the power transmitter and suffers from big amount of magnetic cores, which is not suitable for some applications such as electric vehicle wireless charging. This paper presents...
In this paper, a novel dynamic wireless power transfer system is designed for roadway EV powering application. Multiple LCL resonators are parallel connected in a high-power inverter and are turned on/off through vehicle positioning result. Compared to the conventional long-rail manner, firstly, the miniaturized transmitter can greatly reduce the electromagnetic radiation. Secondly, construction costs...
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...
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