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Pushed through an increasing amount of renewable energy sources in the German grid, the fluctuation in energy generation rises. Therefore, a balancing system which takes the grid stabilizing role is necessary. Depending on the time periods of the chosen sales channels, different storage systems can be used. For short and middle time spans an electrochemical system like a battery energy storage system...
Energy consumption is a major concern in battery powered wireless sensor networks (WSN). For that reason there is a strong demand for the evaluation of power consumption of nodes in a wireless sensor network during its development phase. This evaluation can be done in early design stages by using simulations and models, but there is also the need for an evaluation in a real setup. This paper presents...
DC grid has gained a special attention by many researchers, especially in the last decade. The two main factors that emphasize the DC grid area of study include the DC nature of the majority of Distributed Generation (DG) sources, as well as the emerging of new DC loads that need several power conversion stages when connected into the current AC network. Therefore, it is needed to study the possibility...
This paper deals with the thermal and electrical modelling and simulation of an automotive high power battery cell. The electrical modelling is implemented for determining the electrical losses. The electrical losses are converted to heat losses and therefore a heat flow in the cell. The thermal modelling is based on a 1D implementation by means of discrete volume elements. The resulting simulation...
This article deals with design and implementation of experimental wireless network for basic physiological data transmission from patient to medical staff. Low energetic consumption and system simplicity was the main importance of design. Information about body temperature, pulse rate and battery level are transmitted using ZigBee standard. This network is suitable for any sensor data transfer in...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
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