Category | September

IGBTs at Higher Operation Temperature

Posted on 16 August 2012

      Impact on inverter design The development of IGBT power modules has always been characterized by the continuous increase of the power density for cost reduction and design optimization of the complete frequency converter system [1]. The requirement of higher power density is directly associated with increased current per chip area and therefore [...]

Efficient Power Solutions for LED Lighting Installations

Posted on 29 June 2012

      A review of best practice in developing efficient power supply solutions for solid state lighting The LED lighting market looks set to explode, with some sources predicting that in five years time 50% of the global lighting market will be fulfilled by solid state solutions. Whether street or office illumination, refrigeration or [...]

Taking Power Density to a New Level

Posted on 29 June 2012

      Efficient inverter assembly now in even more applications The well established, 15-year-old MiniSKiiP family now has two new additions: MiniSKiiP 3-level modules and the MiniSKiiP IPM. MiniSKiiP modules have proven to be very successful thanks to their power density, reliability and easy and fast one-screw mounting. The 3-level MiniSKiiPs deliver the highest [...]

High Efficient Power Converter for Low Voltage Traction Applications with Power Multiplication

Posted on 29 June 2012

      A combined optimization of MOSFET parameters, electro-thermal concept and gate drive control is the key In low voltage battery fed drives, such as in lift trucks and electrical passenger cars, power MOSFETs with high current ratings up to approximately 100 to 200 ampere and the converter design play a significant role with respect [...]

High-Voltage Power Thyristors with Built-In Protective Elements in the Semiconductor Structure in Case of Emergency Mode

Posted on 29 June 2012

      Nowadays converter equipment based on fully controlled semiconductors switches (IGBT, GTO, IGCT) have developed dramatically in many fields of application, especially in high power and high voltage power electronics but in fact the implementation of “conventional” power thyristors are still technically justified and in demand. By P.G. Dermenzhi, Y.M. Loktaev, A.M. Surma, [...]

NTC Thermistors as Lifesavers for Power Semiconductors

Posted on 29 June 2012

      Integrated temperature protection NTC thermistors with a wafer-based manufacturing process can be integrated very simply in power semiconductors. This allows a reliable temperature monitoring function to be implemented that protects electronic systems from expensive failures or destruction. By David Connett, Director IC Reference Design, EPCOS Conventional ceramic-based NTC (negative temperature coefficient) thermistors [...]

Remote Sensing Utilising Alternative Energy

Posted on 29 June 2012

      Harvest energy from the surroundings Applications that require remote sensing often utilise alternative energy sources for power. This can be found in systems that monitor vibrations in bridges, the growth of trees in forests and seismic buoys. These energy sources usually are limited in the amount of power available so the design [...]

High Frequency Carrying Gate Drive

Posted on 29 June 2012

      A small simply circuitry makes it possible For the “Synchronous bridge rectifier with microcontroller on the mains” was developed a special “high side carrying gate drive circuitry”. The developer and author decided to make it simple, fast and reliable at the same time. By Milan Marjanovic, Texas Instruments   High side gate [...]

Triac Dimmers for LED Lamps

Posted on 29 June 2012

      The basic triac dimmer circuit is so simple that no DC supply is needed Dimming LED lamps with triac based dimmers has been widely discussed and various techniques have been proposed to enable smooth and flicker free dimming. Unfortunately these all add complexity and cost to the LED driver and at the [...]

Dielectric Performance of Ceramic Capacitors

Posted on 29 June 2012

      The resultant effects on the performance of a filter Syfer Technology has considerable experience in the manufacture of MLC capacitors and low pass filters, both panel mount and surface mount, together with ceramic filtering elements such as discoidal capacitors & planar arrays supplied to the low pass filter industry. By Steve Hopwood, [...]