Controllo digitale di convertitori di potenza utilizzati per la trazione ibrida, per la carica wireless di veicoli elettrici e per l’interfacciamento con fonti di energia rinnovabili
Submitted by Alessandro Pevere on Sat, 07/06/2014 - 17:48
The technology of wireless charging, also referred to as wireless power transfer (WPT) or inductive power transfer (IPT), has been successfully applied at the low power level, such as applications for biomedical implants devices and smart phones. Due to the fast growing interest in electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), wireless charging has, more recently, drawn the attention of researchers and car manufacturers as a new way of charging batteries. Compared to conductive power transfer (usually plug-in), WPT is more convenient, weather proof, and electric shock protected. However, there is still more research work needs to be done to further optimize efficiency, reduce cost, increase misalignment tolerance, and reduce size of the WPT chargers. There are many research areas in WPT, such as compensation network and circuit analyses, coil design techniques for large gap and misalignment tolerance, link optimization for high efficiency, control methods, foreign object detection and safety issues. Among them, compensation topology is very important because it helps to adjust resonant frequency, minimize the VA rating of power supply, improve coupling and power transfer capability, and achieve high efficiency. In this presentation, a system, designed for electrical bus rapid wireless charging, will be proposed. A comprehensive introduction of the WPT mechanism will be provided. Afterwards, the focus will put on the technical choices and the development of the power converters employed in this system, discussing different topologies and solutions.
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