Category | November

Short-Circuit Detection is Possible for Power Drive Systems with Long Motor Cables

Posted on 06 November 2013

      Long motor cables add high parasitic inductive and capacitive loads to the system. These parasitics lead to reflections on the collector-emitter voltage and the collector current, which have a considerable duration due to the length of the cable. By Marc Buschkühle and Christian R. Müller, Infineon Technologies AG and Benno Weis, Siemens [...]

Miniaturisation of High Voltage, High Capacitance Multilayer Ceramic Capacitors

Posted on 06 November 2013

      There is a constant battle to reduce size and weight of electronic components. Moore’s law supposes that for computing hardware the number of transistors on an integrated circuit doubles every 2 years. Assuming that available space for these components does not increase - in fact it is generally desirable that this space [...]

Quality Improvement of Reverse Recovery Characteristics

Posted on 06 November 2013

      Measurement of High Voltage Thyristors for Series Connection Application Nowadays high voltage thyristor stacks based on series connected assemblies are widely used in soft starters for high power motors and high voltage controlled rectifiers in industrial applications and transportation, in HVDC line converter units for the electric power industry. Thyristors in such [...]

Line Filter - The Last Barrier in the Switch Mode Power Supply

Posted on 06 November 2013

      Switch mode power supplies result in conducted interference because they generate radio interference voltage on the mains side. This can interfere with other equipment supplied with mains power. Line filters help to suppress the generated radio interference voltage. These can easily be designed from passive components such as current-compensated line chokes and [...]

Extending the MOSFET Gate Drive Conductors

Posted on 06 November 2013

      Using a Dual Stripline PCB Layout Configuration In many applications there will be a need to place one or more rails in a Power XR application at some distance from the controller. This article will introduce and examine from both a theoretical and practical standpoint a layout design technique that will allow [...]

Metallized Film Capacitors

Posted on 06 November 2013

      Considerations for selecting the most suitable types The expected life cycles of electronic products are continuously increasing, so that today life cycles of up to 10, 15 or 20 years are expected. Of course, each electronic component used in such a product should have at least the same lifetime-expectancy. By Dieter Burger, [...]

Oscilloscope Reinvented

Posted on 06 November 2013

      The convergence of power stage modeling and signal processing within the HIL gives its oscilloscope function a high-bandwidth probeless access to all signals within the test setup. This convergence opens up unheard-of possibilities for automatic testing and reporting. By Subhashish Bhattacharya NC State University, Toni Gualtieri, Predrag Nikolic and Dusan Majstorovic Typhoon [...]

Combined Capacitor and Choke for Motor-Run Applications

Posted on 05 November 2013

      Economic and efficient control of bidirectional motors A design for the control of bidirectional AC motors features the EPCOS LCap, a combined motor-run capacitor and choke in a single rugged package. Thanks to LCap’s narrow tolerances over time, compact size and reduced assembly complexity, it is designed for use in economical and [...]

Expanding the Dynamic Range of Current Measurement

Posted on 05 November 2013

      ASIC-based current transducers can expand the dynamic range and increase the sensitivity and reliability of current measurement. In power electronics, the accuracy with which electrical current is measured is not solely based on the selection of a suitable transducer. By Erik Lange, Marketing & Applications Engineer, LEM USA, Inc. Level-shifting and intermediate [...]

Highly Efficient UPS Topologies with Regenerated Switching Losses

Posted on 05 November 2013

      High efficiency is a must for solar applications. Now other applications are emerging with equally challenging demands for efficiency. With the experience gained in high-efficiency solar applications, it is possible to exploit synergetic effects for next-generation UPS topologies. And in contrast to the solar market, system costs have been a focus topic [...]