Category | June

Ceramic Capacitors for Very High Voltage and High Energy Storage

Posted on 01 June 2007

       Electrical Parameters Involved in the Design Today a large range of dielectric materials is available for manufacturing ceramic capacitors from NP0 dielectrics with low permittivity and very low D.F, to X7R or even Z5U materials with higher permittivity, and an unfortunately high D.F . However few materials are in fact acceptable for [...]

Interview on Power Management Technology

Posted on 01 June 2007

      with Dave Freeman, System Engineering Manager, Texas Instruments By Bodo Arlt, Editor BPS   Bodo Arlt: What end markets will drive TI for power management technology? Dave Freeman: TI’s power management business is divided into several power product development units, focused on batterypowered and line-power system end-equipment designs. For example, we have [...]

Power Over Ethernet Design

Posted on 01 June 2007

      Keep it simple and flexible Power over Ethernet (PoE) is the technology that integrates both power and data over a standard Ethernet cable. PoE equipments such as IP phones, security cameras, wireless local area network nodes, and even musical instruments make use of the PoE technology. By Werner Berns, Application Design Center [...]

Alternative Efficiency

Posted on 01 June 2007

      By Arnold N. Alderman, Anagenesis, Inc.   In recent years two major efforts have consumed mega engineering hours of effort in the struggle to achieve improved performance. I speak of the efforts to achieve commercially viable alternative energy and the equal struggle to achieve improved efficiency both in conveyance and conversion. One [...]

Reliability With a Long Operating Life

Posted on 01 June 2007

       Film capacitors are well suited as link-circuit capacitors in converters Polypropylene is currently regarded as the most suitable material for the dielectric due to its low dielectric dissipation factor. It has also demonstrated a low dependence on frequency, which is a critical criterion for withstanding large RF interference currents. By Freddy Esteban,Product [...]

IGBT4 Technology Improves Application Performance

Posted on 01 June 2007

       Semiconductor technology and housing - the perfect match In the ever growing market for frequency converters, many manufacturers offer different types of converters that vary in performance and size. That’s where new IGBT technologies, which are distinguished by lower losses and higher switching frequencies, come into play. The use of new chip [...]

Next Generation IGBT- Modules

Posted on 01 June 2007

      Advanced Trench-FS chip technology Fuji Electric is continuously working on an improvement of the existing IGBT modules. Now we are presenting our latest development result, which is combining a new, advanced chip technology with a new concept package for the PIM configuration. The new PIMs have designed based on the keywords of [...]

1200V IGBT4 Low and Medium Power

Posted on 01 June 2007

       Chips designed to the Needs of the Application By Wilhelm Rusche, Marco Bäßler, Infineon Technologies   The new 1200V IGBT4 generation combined with the improved EmCon diode from Infineon provides three optimized chip versions for low, medium and high power IGBT modules that are designed to the needs of modern inverter concepts [...]

Industrial Drives – System Integration

Posted on 01 June 2007

       ECPE Demonstrator Programme The main goal is to significantly reduce the converter size of an industrial drive for an asynchronous machine compared to state-of-the-art commercial units By Professor J. A. Ferreira, Delft University of Technology, Electrical Power Processing research group (EPP)   Project scope and objectives The best power density on the [...]

Power Supplies with Ultra-High Power Density

Posted on 01 June 2007

       ECPE Demonstrator Programme This article describes results of the “Power Supplies with Ultra-High Power Density” Demonstrator Programme performed by the Power Electronic Systems Laboratory (PES) at the Swiss Federal Institute of Technology (ETH) Zurich. By Professor J. W. Kolar, ETH Zurich, Power Electronic Systems Laboratory (PES)   The power density of power [...]