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Electromagnetic interference (EMI) and its filtering are important considerations in switching power converter design. It has been recognized that an EMI filter must be sufficiently damped in order to avoid undesirable interactions with the converter or the source, which otherwise may lead to instability and degraded control performance. Optimal damping of single-stage LC filters that achieves maximal...
High frequency (HF) models of electrical motors and converters are of basic importance for Electro Magnetic Compatibility (EMC) characterization of electrical drives and for EMI filters design. In this paper a method for characterizing and tuning HF models (150kHz - 30MHz) for induction motors has been proposed based on experimental measurements of the motor impedance. Impedance measurements have...
On the basis of analyzing the maximum short circuit current flowing through the converter valve under different short circuit conditions, the authors propose a method of calculating the short circuit impedance. In addition, on the basis of taking the restrictions which have great influence on the short circuit impedance of the converter transformer into account, the authors point out that the short...
Analysis methods are developed that fully determine a switched-capacitor (SC) dc-dc converter's steady-state performance through evaluation of its output impedance. This analysis method has been verified through simulation and experimentation. The simple formulation developed permits optimization of the capacitor sizes to meet a constraint such as a total capacitance or total energy storage limit,...
In this paper the performance of the ESPAR (electronically steerable passive array radiator) antenna in suppressing both the co-channel and inter-symbol interferences is compared with the conventional circular and linear arrays. For this purpose, the STAP (space-time adaptive processing) is implemented in both arrays with equal elements. Simulation results show that when the pattern of the ESPAR antenna...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
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