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High voltage gain is required in many practical wireless power transfer(WPT) systems and the robustness of voltage is very important for wireless power transfer systems with high voltage gain. This work proposes a method to select the optimal topology with good performance in three aspects: robustness, voltage gain and transfer efficiency for several common topologies of WPT system, and optimize the...
As the power demand for some railway applications rises up to the Megawatt level, the conventional Wireless Power Transfer (WPT) system can hardly meet the power requirements for rail vehicles due to capacity constraints of power electronic devices. In order to improve the power capacity of the WPT system, a novel dual transmitters and dual receivers based WPT system is proposed. The dual transmitters...
For Wireless power transfer with multi-pickup, cross coupling among multi receivers is an inevitable problem which will greatly influence the system performance. Due to its complexity, there is not one identification method yet. This paper proposes a cross coupling-coefficient estimation method, only the primary current is need to be detected. By decoupled one secondary pickup circuit, the mutual...
Ultrasonic Power Transfer technology is beneficial to transmit power through the metal conductor, and does not produce electromagnetic radiation. As the maximum power transfer condition is still unknown at present, we propose a method to accurately determine maximum power transfer condition. By using electro-mechanical equivalent principle, we establish system overall model of ultrasonic power transfer...
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