Category | July

Six Inch Thyristors for UHVDC Transmission

Posted on 06 July 2012

      The making of the largest thyristor around. The most powerful converter available has recently been erected in China. To realise the required rating of 6.4 GW for an UHVDC (Ultra High Voltage Direct Current) transmission, a new thyristor, that can operate the high DC-current of 4 kA at the highest possible blocking [...]

Thermal Interface – The Flawless Solution

Posted on 06 July 2012

      Material has to be sufficient in five ways Setting up a reliable thermal interface between power electronic components and a heat sink depends on choosing and applying an adequate thermal interface material (TIM). It is mandatory to ensure that the chosen material withstands the thermo-mechanical stresses as well as maintains its thermal [...]

System Stability – Intelligence can be Outside the Processor

Posted on 06 July 2012

      Buck Boost DC-to-DC converters that can dynamically limit the inrush current Portable applications are in constant change. Innovation must be the designer’s motto if they want to be successful in this market. Whether adding new features to re-boost existing devices or developing new projects all together, the consumer electronics industry is in [...]

Free Online Tool for Thermal Modelling of Heat Sinks

Posted on 06 July 2012

      Introduction of 2nd Generation of R-Tools Introducing a new version of R-Tools, a free online thermal modelling tool for heat sinks, is based on an advanced three-dimensional numerical model. It is available by browsing to http://www.r-theta.com/rtools_front.html and completing some brief login instructions. By Rainer Selisko, Mersen former Ferraz Shawmut   The simple [...]

Critical Elements to Magnetic Components

Posted on 06 July 2012

      The Area of High Voltage/High Reliability Environments In the high reliability environments of today’s control systems there are four major concerns with magnetic devices: Efficiency, Thermal Rise, System Performance, and Insulation Requirements. All four of these seemingly different requirements are intertwined and have a dramatic effect on each other. By: Dr. Kevin [...]

Reliability: The Other Parameter when Selecting a DC/DC Regulator

Posted on 06 July 2012

      This reliability report is available online for all to review Consider a DC/DC regulator: basically, a complete DC/DC regulator circuit that is encapsulated in a package similar to an IC. Let’s say that you have examined a selection of products from several vendors and all do the power conversion, more or less, [...]

Streetlighting Requires Large Numbers of LEDs

Posted on 06 July 2012

      System Requirements and Existing Solutions Backlighting with LEDs differs from general purpose lighting in the type of LEDs used. Whereas many general lighting applications use less than 10 LEDs of fairly high power such as 1W each, backlighting tends to use hundreds, possibly thousands of small LEDs running at powers of 50 [...]