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This paper proposes a cost-effective solution useful to remotely control via Internet a nanogrid. The effectiveness and the goodness of the proposed solution is demonstrated in a laboratory setup using a 1kW single-phase nanogrid prototype. A development board Atmel EVK1100 is used to generate the PWM signals that force the IGBTs of all power converters belonging to the nanogrid. A single-board computer...
Design and build dc nanogrids is not an easy task, even in an experimental campaign in the laboratory. A crucial point is the control of the bidirectional ac-dc converter, which joins the dc nanogrid to the utility grid. In this frame, the paper illustrates how control a 22.8kVA IGBT three-phase inverter, model Semiteach by Semikron, via an evaluation/developing board, model EVK1100 by Atmel. PWM...
On the basis that a processing resource optimally calculates the loads scheduling one day-ahead for those prosumers operating in a demand response program, the question is: who acts the scheduling? This paper presents an electronic device named Smartbox as a low-cost and feasible home automation solution; so, given a processing resource which optimally calculates the loads scheduling one day-ahead,...
Modern antennas and applications are expanding the frequency range towards both lower and higher frequencies while demanding very rapid development and testing cycles. A fast, reliable and accurate way to exhaustively determine antenna and device performance is based on near-field measurement techniques combined with probe array technology. This paper reviews recent developments in multi probe antenna...
This paper proposes an innovative management strategy for a stormwater detention tank, whose main function is to prevent the risk of flooding in urban environment due to intense rainfall events. In the moments when the tank is not required to carry out its main function, the proposed use involves the operation of the tank as energy storage system, thanks to the introduction of a pump/turbine group,...
This paper presents a segmentation process of the myocardium, endocardium and epicardium surfaces of the heart from 3D SPECT images to compute a heterogeneity index. This index represents the distribution of the activity in the myocardium. Because of the low resolution of SPECT images, the thickness of the myocardium is 1 to 4 voxels and a sub-voxel accuracy is therefore needed. The segmentation process...
Different AC pulsed stress signals have been applied to an n-type LDMOS with shallow-trench isolation (STI). The HCS degradation curves have been measured on wafer by varying frequency and duty-cycle under a high-VDS stress for both low and high Vgs biases. The linear drain current drifts have been also investigated through TCAD predictions under AC stress conditions for the first time. A quantitative...
The paper presents a dual active bridge converter, i.e. an isolated bidirectional DC/DC converter composed of two full-bridge DC/AC converters and an isolation high frequency (HF) transformer, useful for application in a DC-powered microgrid. The dual active bridge converter connects a battery energy storage system to a DC bus so to provide a high level of reliability and resilience to grid disturbances...
The linear drain current degradation due to hot-carrier stress (HCS) of an n-type LDMOS with shallow-trench isolation (STI) has been investigated through experiments and TCAD predictions under AC pulsed stress conditions. The systematic increase of degradation with frequency and the dependence on rise/fall times and duty cycle has been explained by using a new TCAD approach based on physical models...
A new TCAD-based approach is used to investigate hot-carrier stress (HCS) effects, especially suited for power devices. Physically-based degradation models are used to determine the interface trap generation at different stress biases and ambient temperatures. Special attention has been given to the high current-voltage regimes, when significant self-heating effects and impact ionization play a relevant...
The concept of fabric, defined by the description and classification method introduced by Whitbread (1995), has been usually used to perform petrographic studies of thin sections of ancient ceramics. This work analyzes pottery of archaeological interest by making use of image processing algorithms. First a preliminary petrographic analysis has been quantitatively performed by point counter stage....
Physically-based models of hot-carrier stress and dielectric field-enhanced thermal damage have been incorporated in the framework of a TCAD tool with the aim of investigating the electrical stress degradation in integrated power devices over an extended range of stress biases and ambient temperatures. An analytical formulation of the distribution function accounting for the effects of the full band...
The correct performance evaluation of antennas operating in complex and electrically large environments such as satellites, ships, planes, mobiles etc. or antennas in urban or indoor environments, all require large and accurate measurement facilities, breadboarding of scaled models or complex on-site measurement campaigns. As a consequence, iterations during the design cycle based on antenna breadboard...
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