Abstract
Wireless power transfer (WPT) technology has drawn much attention due to its advantages such as safety, convenience, and non-contact. For some movable devices such as intelligent inspection robot, the constant output voltage is very important to ensure its normal operation. In order to improve the system efficiency and steadiness of output voltage, a maximum efficiency tracking and constant voltage charging method is proposed for the dynamic WPT system. In this method, the mutual inductance and optimal input voltage can be estimated accurately no matter the coupling coefficient and equivalent load change or not. The simulation and experimental results have shown that the WPT system realize maximum efficiency tracking and constant voltage charging when the resistance is changed from $10\Omega $ to $5\Omega $ , and the same result was achieved when the mutual inductance is altered from $20~\mu \text{H}$ to $10~\mu \text{H}$ .
Highlights
Wireless power transfer (WPT) technology has drawn much attention from the academic and industrial circles for its advantages such as safety, convenience, and non-contact [1,2,3]
This paper proposed a novel maximum efficiency tracking method for the dynamic wireless power transfer (WPT) system
In this paper, a maximum efficiency tracking and constant voltage charging method is proposed for dynamic WPT system with LCC-S resonant topology
Summary
Wireless power transfer (WPT) technology has drawn much attention from the academic and industrial circles for its advantages such as safety, convenience, and non-contact [1,2,3]. In [16,17,18], the secondary side achieves the constant current charging, and the primary side searches the minimum DC input current to realize the maximum efficiency tracking This method cannot track the maximum efficiency when the coupling coefficient changes greatly like in the dynamic WPT system. The primary side realizes the constant current charging, and the secondary side realizes coupling coefficient estimation and optimal resistance matching. This method only verifies the MET in a static WPT system. This paper proposed a novel maximum efficiency tracking method for the dynamic WPT system In this method, the mutual inductance and optimal input voltage can be estimated periodically. The differences between the proposed and previous methods are discussed
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