Category | July

Integrated Digital Isolation Delivers Enterprise Energy Efficiency Benefits

Posted on 23 July 2012

      The cumulative effect of efficiency improvements can be quite substantial Power over Ethernet (PoE) standards have made it possible to deliver power to network devices along the same Ethernet cable used for data, eliminating the need to provide a ‘wall wart’ power cube for each device. Network power is thereby consolidated at [...]

Planar Transformers are Essential for Truly Efficient Electric/Hybrid Vehicles

Posted on 23 July 2012

      Weight advantage makes them more efficient than conventional ‘wire-wound’ equivalents When the first mass-produced motor car, the ‘Model T’, rolled off the production line in 1908, Gerald Ford famously told the world that “you can have it in any colour, as long as it’s black”. Today, a century later, the motor car [...]

The Bi-mode Insulated Gate Transistor (BIGT)

Posted on 23 July 2012

       A High Voltage Switch for Next Generation Megawatt Applications An advanced high voltage reverse conducting IGBT concept referred to as the Bi-mode Insulated Gate Transistor (BIGT) is currently being developed. The BIGT can operate at the same current densities in both IGBT and diode modes by utilizing the same available silicon volume [...]

Smarter Rectification

Posted on 23 July 2012

      Driving up SMPS Efficiency and Power Density Performance, size and efficiency advantages have made the LLC series-resonant converter the preferred power supply topology in applications such as high-end consumer products. Going forward, improvements to the secondary side architecture are necessary to further enhance efficiency and space savings. By Helen Ding, International Rectifier [...]

Get <1ppm Performance from a 10ppm Precision Reference

Posted on 23 July 2012

      Rejustor Technology turns a good voltage reference into an ‘industry best’ Precision References require the user to make major cost/performance tradeoffs. Until now, ultra-high performance came at a high price. By using a low cost, tunable resistor divider (Rejustor) from Microbridge, precision references can be made more accurate and their temperature coefficients [...]

Power Module Testing with Combination Testers

Posted on 23 July 2012

      Quality requires 100% testing of semiconductors Since the Die cannot be tested thoroughly before the assembly, all parameters have to be tested after the module was assembled. A complete test consists not only of parameter testing but also the thermal connection of the chip to the heat sink and the dynamic switching [...]

Low Consumption Flux-Gate Transducer

Posted on 23 July 2012

      Both AC and DC High-Current Measurement is achieved This article presents the design and implementation of a transducer system for the measurement of AC and DC high-current using the flux compensation technique in the measurement transformer, also called Flux-gate technology. The system can measure currents greater than 700 A (peak value) with [...]

Choosing The Right Topology

Posted on 23 July 2012

      Design rules have been proven successful Whatever the final application, power supply users want reasonably priced products that are small and efficient, yet have excellent EMC performance. The article explains how the choice of power supply topology can greatly affect these key parameters. By Andrew Skinner, Advanced Development Manager, TDK-Lambda   There [...]

Comparison of Sensorless Algorithms for PMSM Rotor Position Detection

Posted on 23 July 2012

      Permanent Magnet Synchronous Motors (PMSM) and the actual implementation It’s no news that richer performance vector control drives for AC motors could be beneficial, in terms of dynamics and efficiency as well as for every aspect an ideal control should have. The good news is that the time has come to make [...]