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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 automotive applications, the Z-source inverter is a single stage inverter that provides the useful feature of boosting the DC-link voltage to a desired value independently of the battery voltage. The advantage of an adjustable DC-link voltage can be used as a degree of freedom for a loss minimized control of electric drives. However, the semiconductors experience high stress during boost operation...
An optimize design process of inductors and transformers used in switching power converters is presented in this paper. An analytical modeling of conductor physical behavior was developed to match optimization requirements, and used to compare various components with different cores — coils geometries and wire technologies. Rigorous analytical modeling was applied to achieve minimization of the losses,...
We have designed an inductively coupled oxygen sensor suitable for operation at temperatures in the 500-1000 C range. A prototype sensor has been fabricated on alumina substrates using screen printing. The sensor consists of an RLC resonant circuit where the oxygen-sensitive ZnO resistor varies the quality factor. Changes in the quality factor are measured using an admittance bridge coupled to the...
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