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Experimental results about tests on a commercial power bricks under radiations is presented. The experimental obtained results are very interesting in order to evaluate the possibility to use particular electronic device, which can be used in harsh environment. The power bricks tested in this paper highlights interesting technical specification.
It is well known that Failure Mode Effect Analysis methodology (FMEA) allows to reduce, and if it possible eliminate, the effects of potential failure modes starting from the first stage of the product design. By means of the Criticality Analysis (CA), implemented in FMECA, it is possible to select by means of risk indexes the most potential critical failures. In this paper the authors present the...
The performance in magnetic field (B-field) of a DC-DC converter ad hoc designed for LHC operation has been evaluated. The tests have been carried out at the Laboratorio Acceleratori e Superconduttività Applicata (LASA), in Milan (Italy), in the first months of 2014 and the experimental results are here presented and discussed. The ability to operate in hostile environment of the tested DC-DC converter...
THE High Luminosity upgrade of the Large Hadron Collider will pose new challenges to the installed detectors. Higher beam background, combined with new requirements in terms of power supply for the upgraded detectors, and the presence of magnetic fields up to 1 T, make the choice of power supply electronic components a crucial point for the successful operation of the detectors for the new physics...
The power produced by a solar panel depends on several parameters. In order to optimize the production, the ability to operate in the Maximum Power Point (MPP) condition is requested. The ability to identify and reach the MPP condition is therefore critical to an efficient conversion of the photovoltaic energy. In this paper, several computational intelligence paradigms are challenged in the task...
Devices used in future experiments at LHC will be called to work in a very hostile environment. Power supply is a key aspect in this scenario, and new converters will be re-designed in order to meet the future requirements. Moreover, also Point of Load (PoL) converters, as circuits able to adapt the voltage level for each board, device and situation, need to be re-designed in order to meet the future...
The reliability of a power converter can be improved using a well-dimensioned cold plate. At this aim it is necessary to realize a state of the art cold plate by means of thermal-fluid dynamic numerical analysis and ad-hoc designed experimental test bench. Features and metrological characterization of test bench for cold plate design and verification will be discussed in this paper.
Devices used in future experiments at LHC will be called to work in very hostile environment. Power supply is a key aspects in this scenario and new converter will be re-designed in order to meet the future requirements. In this paper a main DC-DC power converter, developed by authors in the framework of the APOLLO R&D project, has been proposed and the experimental activity devoted to its characterization...
The modeling of solar radiation for forecasting its availability is a key tool for managing photovoltaic (PV) plants and, hence, is of primary importance for energy production in a smart grid scenario. However, the variability of the weather phenomena is an unavoidable obstacle in the prediction of the energy produced by the solar radiation conversion. The use of the data collected in the past can...
It is well known that the knowledge of solar radiation represents a key for managing photovoltaic (PV) plants. In a smart grid scenario to predict the energy production can be considered a milestone. However, the unsteadiness of the weather phenomena makes the prediction of the energy produced by the solar radiation conversion process a difficult task. Starting from this considerations, the use of...
A reliable forecast of renewable energies production, like solar radiation, is required for planning, managing, and operating power grids. Besides, the short-term prediction of the climatic conditions is very useful for many other purposes (e.g., for Climate Sensitive Buildings). Data for the prediction can be produced by several sources (satellite and ground images, numerical weather predictions,...
Planning, managing, and operating power grids using mixed traditional and renewable energy sources requires a reliable forecasting of the contribution of the renewable sources, due to their variable nature. Besides, the short-term prediction of the climatic conditions finds application in other fields (e.g., Climate Sensitive Buildings). In particular, this work is related to the solar radiation forecasting,...
The renewable energy industry has been growing remarkably in the last years and the Fukushima event has given a further incentive. In this context, solar radiation represents one of the most accessible and clean energy resources. For this reason the number and size of the photovoltaic (PV) systems is growing and consequently the amount of the investments and the related opportunities and risks are...
The renewable energy industry has been growing remarkably over the last years and the recent Fukushima nuclear crisis has given a further incentive worldwide. In this context, solar radiation represents one of the most accessible and clean energy resources. For this reason the number and scale of installed photovoltaic (PV) systems has been growing, and consequently the size of the associated investments,...
In a scenario where renewable energies will play a foreground role, a reliable forecast of the energy production of such sources, like solar radiation, is a requirement for managing smart grids. However, the ability to predict the possibility to produce sustainable energy in different climatic conditions can be very useful for many other purposes (e.g., for Climate Sensitive Buildings). This is particularly...
Industrial Control Systems (ICS), formerly isolated proprietary systems, are giving place to highly-connected systems, implemented using widespread operating systems and network protocols on public networks. Such standardization trend opens the door to security threats previously restricted to the corporate and personal computing areas. This paper presents how the main concepts of security in conventional...
In modern industrial applications, because of the increasing requirements in term of quality and efficiency, the employment of an effective maintenance strategy is becoming crucial. As a consequence, the service activity is moving towards the development of diagnostics and prognostics techniques aiming to minimize the impact of the failures on the production. In previous papers two simple diagnostic...
Statistical process control (SPC) is actually used in order to reduce non conformity (NC), defects and waste. Traditional approach to industrial process and quality control depends on the production department of the industries to screen out items which do not meet the wanted requirements. This is often due to variation of the parameters under test. However, it would be considered that it is very...
The target of this work is to design and test an on-board diagnostic device able to detect a rotor fault in a small cage rotor inverter-fed induction machine. In particular, the system computes the values of two indexes introduced by the authors in previous work. The capability of the aforementioned indexes to detect rotor asymmetries in open loop asynchronous AC drive systems has been previously...
Nowadays virtual instruments (more briefly called VIs) are very useful tools both in research and industrial applications. Their great flexibility, re-configurability, reliability and ease of use allow an effective implementation of complex measurements architectures. In particular, the capability to manage long measurement processes without staff presence makes the VIs a powerful support for the...
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