Category | November

Getting the Most From Your Brushless DC Motor

Posted on 01 November 2008

      It is possible to run a sensor-less 3 phase motor on a PIC16 microcontroller With a wide variety of motors and drive solutions available for Brushless Direct Current Motors (BLDC) are you sure you have considered all the options and selected the best combination for your application. This article discusses 3 phase [...]

Unipolar Switching Full Bridge Modules Make Solar Inverters More Efficient

Posted on 01 November 2008

      The size, performance, reliability and cost are very important criteria The decrease of fossil fuel resources, the global climate and the environmental problems on the planet requiring a significant reduction of carbon dioxide emissions lead us to use the energy in a more efficient and intelligent manner. There are from now on [...]

Power-Save Mode Principles in Low-Power Synchronous Buck Converters

Posted on 01 November 2008

      As with many engineering problems, there is no single best answer Modern synchronous buck converters for portable applications provide so called powersave mode operation to maintain high efficiency over the entire load range. At light loads, the converter operates with pulse frequency modulation (PFM mode) providing automatic transition into pulse width modulation [...]

Get your motor running…

Posted on 01 November 2008

      Modern appliances depend increasingly on motion control Semiconductor integration and advances support power-efficient BLDC motor designs. Greater integration and advances in semiconductor technology are enabling more costand power-efficient solutions for brushless DC motor drive circuits. By Frank Thimm, Georges Tchouangue and Matthias Diephaus, Toshiba   To some observers it may appear that [...]

PMSM Control for Naturally Rotating Loads

Posted on 01 November 2008

      Now available in dedicated controller ICs By implementing all relevant functional blocks in hardware, the MCE achieves significantly higher torque and speed control bandwidth than traditional DSP-hosted software alternatives. Furthermore, silicon area is minimized since library functions such as PI compensators and vector rotators can be used multiple times in the motor [...]

Keeping the Electricity flowing in Southern Africa

Posted on 01 November 2008

      Electrical engineering companies like ABB and General Electric use Bergoz current and charge measuring instruments in their corporate research labs and in field applications, measuring partial discharge in power cables, corona, insulation breakdown and monitoring and locating high voltage power line faults. By David Baddeley, Bergoz Instrumentation   Bergoz Instrumentation, located in [...]

Getting into Shape

Posted on 01 November 2008

      High-frequency gate drive module features ultra-flat design A new family of versatile 1.7kV gate driver cores has been specifically tailored to the needs of fast switching and high-power systems. With their innovative high-voltage planar transformers, these 20W, 60A modules of the 1SC2060P series greatly outperform conventional ring-core solutions in terms of power [...]

Measuring Currents without Losses

Posted on 01 November 2008

      Miniaturized current sense transformers Two new series of miniaturized SMT current sense transformers are designed for no-loss current measurements in compact DC/DC converters. By Bernhard Röllgen, Product Development Manager Transformers and Karl Stoll, Product Development Manager Transformers, EPCOS   Current sense transformers (CST) are used for controlling and protecting circuits as well [...]

Advances in Ignition Systems

Posted on 01 November 2008

      Improved Gas Mileage and Lower Emissions As fuel prices continue to rise and consumer awareness and or government regulations for lower combustion emissions increase, automobile manufacturers are exploring ignition strategies to improve the performance of their vehicles. Over the past decade, automotive ignition circuits have evolved from a purely mechanical switch used [...]