The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To take full advantage of the high reliability of brushless DC motors (BLDCMs), an electronic control unit with equally high reliability is mandatory. In this paper, a solution is proposed for cost and reliability drawbacks associated with integrated BLDCM controllers by using reconfigurable technology to implement control logic. An embedded DSP design for FPGAs is presented that is able to drive...
The increase of the load of some Medium Voltage (MV) cables, due to, amongst other things, the development of decentralized production, brings up “new” issues. A practical case of failure in Belgian MV cable networks, highlighted the importance of the thermal characteristics of the soil around highly loaded cables. An analysis of the thermal physical parameters of three types of soil (backfill, sandy...
Cable links with a high current load become more usual, especially with wind power generation and third party access to mv cable networks. Analyses of failed medium voltage joints from high loaded cable links in The Netherlands tend to indicate that thermo-mechanical forces play an important role in most failure mechanisms. Theoretically, huge forces can be expected on MV joints, due to the expansion...
Extruded Low Voltage (LV) cables systems are ageing and an assessment of their condition is now necessary to build up a strategy regarding the management of this asset. This paper describes on the one hand the symptoms observed on faulty LV cables and branching joints by means of visual examination, material and electrical measurements in Laboratory. On the other hand, the paper describes the different...
One of the main failure causes of MV joints is related to thermal ageing of the joint. The European Standards [1] for MV joints for cables describe heat cycle tests in air and water to evaluate the compatibility of the joint with a specific cable. The connectors used in combination with the joints are tested separately in free air (according to [2]). Investigation on several failures that occurred...
The quality of the external semi-conductive (SC) layer of separable deadbreak connectors designed for MV was assessed with a view to use them in outdoor applications. EPDM and SIR based connectors were exposed during 1000 hours to an artificial accelerated weathering. The external SC layers were characterized and evaluated by means of chemical, material, mechanical and electrical analyses before and...
The “SmartLife” initiative is a European coordination project, relating to the asset management of distribution and transmission networks, gathering multiple partners mainly from utilities, but also from test laboratories, R&D institutes and universities from 9 European countries. The SmartLife project deals with 2 main concerns: On one hand, as significant parts of European networks have been...
The permitted ampacity for a MV-cable is currently based on tables [1] which hold into account the placement of the cables and derive the permitted load. These tables are limited to the most used placement setups and load cycles. In recent years it is also possible to simulate the core-temperature of the MV-cable by using simulation software. This software can hold into account more complex burying...
This article focuses on the relation between translations and the transmission of scientific thought in the Middle Ages, and proposes a means to evaluate the degree of this transmission. It shows by examples that translations, on the one hand, and the reception of these translations, on the other hand, are intrinsically related phases of one and the same process of transmission. Both phases must be...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.