Abstract
There are several resonance frequencies points in the high-order resonant network to realize constant current/constant voltage output, but the disturbance of the resonant network parameters will affect the output characteristics of the system. Therefore, selecting the appropriate resonant frequency is necessary to achieve stable output characteristics of wireless power transmission. This paper analyzes the influence of sensitivity of the double-sided LCC compensation network parameters on resonance point and output characteristics. Moreover, this paper proposes a design method to realize load-independent constant current and constant voltage output under two ZPA frequencies, and the resonance parameters are optimized for the realization of ZVS. Under constant current and constant voltage output resonant points, the transmission efficiency of the double-sided LCC IPT system reaches 88.9% and 88.5%, respectively.
Highlights
Lithium-ion batteries are considered the most competitive battery for electric vehicles because of their high-power density, long cycle life, safety, and environmental protection. [1,2,3]
Wireless power transfer is widely used in battery charging applications ranging from low-power battery charging for mobile phones to high-power charging for electric vehicles [4,5,6]
Lu has found that load-independent CC and CV outputs can be achieved with multiple resonant frequency points in a double-sided LCC compensation network under zero phase switch (ZPA) conditions. [24,25,26]
Summary
Lithium-ion batteries are considered the most competitive battery for electric vehicles because of their high-power density, long cycle life, safety, and environmental protection. [1,2,3]. Esteban B proposes a double-sided LCC compensation network, achieving system output characteristics independent of load and coupling coefficient. Vu and X.Qu have realized load-independent constant current and constant voltage outputs of double-sided LCC compensation networks under ZPA conditions [22,23]. Lu has found that load-independent CC and CV outputs can be achieved with multiple resonant frequency points in a double-sided LCC compensation network under ZPA conditions. The sensitivity analysis of high-order resonant network parameters to constant current/constant voltage output is not enough and selecting the appropriate resonant frequency operating point still lacks theoretical analysis. The double-sided LCC topology is modeled by T-type circuits and π -type circuits, and the resonance conditions of load-independent CC/CV output under ZPA conditions are obtained. LOAD-INDEPENDENT CC AND CV MODES WITH ZPA CONDITIONS OF DOUBLE-SIDED LCC COMPENSATION TOPOLOGIES
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