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Wireless power transfer (WPT) working at megahertz (MHz) is widely considered a promising technology for midrange and low-power applications. A Class $ E^2$ dc–dc converter is composed of a Class E power amplifier (PA) and a Class E rectifier. It is attractive for applications in MHz WPT due to the soft-switching properties of both the PA and the rectifier. Using the existing design, the Class $E^2$...
Class E rectifier is suitable for high-frequency rectification due to its soft-switching operation, which potentially improves the efficiency of wireless power transfer (WPT) systems working at MHz. In this paper, a robust optimization design is discussed for a 6.78-MHz WPT system using the Class E rectifier. In real WPT applications, the parameter variations are possible to be originated from the...
In this paper, a novel hierarchy control method is proposed to control hydraulic press machine. The complex hydraulic press machine system is firstly decomposed into two simple sub-systems. Then, the corresponding sub-controller is developed to control every sub-system, which is also able to handle the coupling between sub-systems. Finally, the example study will demonstrate the effectiveness of the...
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