Category | March

Searching for the Golden Fleece

Posted on 29 June 2012

      By Werner Bresch, GvA In the middle of January, I received a "call for help" from Bodo Arlt, who said that the author of the cover story for the March 2012 issue had deserted him. He asked me whether I might be able to help out. I would love to have written [...]

Spectral Tuning for White LED based Luminaries

Posted on 29 June 2012

      A smart LED driver can be adjusted for brightness degradation over lifetime If you ask a consumer to characterize the perfect light, you might hear in their description a light requiring the lowest amount of energy, the light output and color is adjustable, it will last a very long time, etc. to [...]

Advanced Ferrite Material for Photovoltaic Systems

Posted on 29 June 2012

      Nearly loss-less Low-loss and high saturation flux density core materials in reactors and transformers are a key determining factor for the efficiency of inverters. The new TDK PE90 ferrite is a cutting-edge material that minimizes reactor losses in the step-up chopper and smoothing circuits of inverters for photovoltaic systems, thus enabling decisive [...]

Implementing “Green Power” in Telecom Architecture

Posted on 29 June 2012

      Why Green Power in Telecom? Telecommunication industry consumes about 1% of electrical energy worldwide that equals to 160B kWh [INTELEC’08]. International Telecommunication Union (ITU) estimates that Information and Communication Technology contributes 2.5% into the worldwide greenhouse gas emission. By Pietro Scalia, EMEA Power Marketing Manager for Telecom   Worldwide trend for energy [...]

The Next Generation Chipset Technologies for Higher Operating Temperatures

Posted on 29 June 2012

      This article presents a newly developed 1700V IGBT and diode chip set generation with optimized performances for 175°C junction temperature operation. By B. Aydin, C. Corvasce, ABB Switzerland Ltd, Semiconductors   Over the past few years, most of the efforts in power semiconductors development have been targeting the increase of the power [...]