Author Archives | GvA Power Electronics

GvA Power Electronics - who has written 12 posts on PowerGuru - Power Electronics Information Portal.

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GvA expands sales portfolio of high power IGBT drivers

Posted on 02 September 2019

    GvA Power Electronics in Mannheim is expanding its sales portfolio of high-power IGBT drivers with a range of new products from Cambridge (UK) based Amantys Ltd.       The Mannheim-based distributor, developer, and manufacturer of custom specific power electronics sees this new product line as the perfect complement for its existing programme [...]

Modular Inverter System from GvA

Posted on 28 August 2019

    With VARIS™, the new Modular Inverter System, GvA Leistungselektronik GmbH focuses on sustainable solutions with standardized and cost-efficient inverters. The modular approach also provides the flexibility required for diverse applications.     The company providing development and manufacture of customer-specific power electronics based in Mannheim is marketing the new state-of-the-art inverter system as [...]

Flexible Power Based on a Modular Concept

Posted on 27 March 2019

      Ready-to-use inverters from the most varied manufacturers in diverse power classes simplify the realisation of projects because no expensive development of the electronic output stage is required. The user receives a complete and qualified solution, but variability and consideration of specific wishes are often neglected. VARIS™, the new modular inverter system, has [...]

Power Electronics for Medium-Voltage Applications

Posted on 25 February 2019

      While the development and production of power electronics systems in the industrial voltage range between 400Veff and 660Veff are regarded as state of the art, at voltage levels above problems occur which are not expected in this form. They begin with a voltage level of 1000Veff and aggravate of course when voltage [...]

Medium-Voltage High-Speed Switches with IGBT Power Semiconductors

Posted on 04 December 2019

      Solid-state semiconductor circuit-breakers have been used successfully for years in low voltage applications in the form of solid-state relays or, in the higher power range, using larger discrete power semiconductors. Since they work without any mechanical switching contacts, there is no mechanical wear and no need for any maintenance with this type [...]

On the Pulse of Power Electronics

Posted on 10 July 2019

      The desaturation behaviour of the IGBT allows to turn them off by the IGBT driver Just about 30 years ago, fast thyristors, RCTs, GATTs as well as GTO and BJT were the best components available at the time for power electronics. Each 100V reverse voltage upwards was keenly fought over, each microsecond [...]

Original or Fake

Posted on 05 July 2019

      Allocation the root of all evil Recently, the number of incidents where users submit complaints to the manufacturer about power semiconductor failures is steadily increasing. Failure analyses show that these power semiconductors are counterfeits or rejects originally intended for scrapping. How can you protect yourself from such counterfeits and what is the [...]

Deadly Sins in Power Electronics

Posted on 03 July 2019

      Different life expectancies can be assumed for different design technologies Power semiconductors can be found in many applications providing high performances in a targeted, managed and reliable manner. Great effort is made in development departments to ensure that the power electronics devices developed there meet the requirements of practical applications. In many [...]

Auxiliary Power Supplies for Medium and High Voltage Applications

Posted on 02 July 2019

      New IGBTs and IGCTs, together with appropriate snubber and freewheeling diodes up to 5.5 kV (6.5 kV respectively), are opening up the possibility of establishing power electronics for the medium voltage level with manageable effort. Tri–level switching topologies and cascaded switching systems are the preferred architectures used here. By Werner Bresch, Managing [...]

The Grey Area

Posted on 29 June 2019

      Access at your own risk Data sheet specifications for power semiconductors are values which are assured by the manufacturers. But they can only be used to a limited extent for dimensioning and calculation. By Thomas Schneider (Dipl.Ing.FH), GvA Leistungselektronik GmbH, Mannheim   The development of more and more compact and efficient systems [...]