Category | November

Sensorless Control for Electrical and Hybrid Electric Vehicles

Posted on 22 August 2012

      An Overview and Simulation For Electrical Vehicles (EV) and Hybrid Electrical Vehicles (HEV) sensorless control of electric machines is a particular relevant topic. There are two main reasons why. Firstly mechanical position sensors are difficult to integrate and to implement into the driveline of the vehicle. Secondly the mechanical sensors are fragile [...]

Flyback Converter and Snubber Design

Posted on 13 August 2012

      Every application has its special needs The Flyback topology is very common for DC/DC converters. Their advantages are the simple design and the low component cost. The function principle is simple. Only a few components are needed. The following article gives some practical ideas to design a Flyback converter. By Ralf Negele, [...]

Power Efficiency within Solid Isolation and Insulation Barrier

Posted on 17 July 2012

      Reduction in power requirements without compromising on noise isolation and high voltage insulation Optocouplers are needed to provide high voltage insulation against transient voltage surges and to reject common mode transient noise from interfering with the input signals. Avago’s next-generation optocouplers, ACPL-1L/061L/064L/W61L/K64L(ACPL-x6xL) offer a significant reduction in power requirements without compromising on [...]

Efficiency Improvement with Silicon Carbide-Based Power Modules

Posted on 17 July 2012

      SiC to become the next generation of power semiconductors In recent years, discrete Silicon Carbide-based (SiC) devices have been introduced to the market. This article describes the utilization of SiC-based diodes and switches in power modules, and compares them to Silicon-based (Si) power modules. Whereas SiC switches have lower overall dynamic losses, [...]

Chip Temperature Measurement without Additional Sensors

Posted on 17 July 2012

      The temperature-dependent forward voltage drop of an IGBT for a small sense current is a particularly suitable method Stress induced by thermal cycles causes power electronic systems to have a finite service life. To estimate this service lifetime, accurate information on the thermal profile in the chips under the given operating conditions [...]

Potential of SiC and other Wide Bandgap Semiconductors in Power Electronic Applications

Posted on 17 July 2012

      ECPE Seminar in cooperation with EPE Association The third User Forum for the first time also considered other wide bandgap devices, in particular Gallium Nitride (GaN) as its subtitle expresses. The user Forum 2009 took place right after EPE conference in Barcelona. Prof. Andreas Lindemann (Otto-von-Guericke-Universität Magdeburg, Germany) took the chair together [...]

Class D Audio Amplifier Matches Class AB With Higher Efficiency

Posted on 17 July 2012

      Class D audio amplifiers are now geared up to replace class AB An integrated high voltage audio driver facilitates the design and construction of a high power class D audio amplifier on a single layer printed circuit board (PCB) that outperforms the traditional linear class AB solution. Additionally, the high voltage class [...]

Intelligent Development Platform Makes Power Management Easier

Posted on 17 July 2012

      COM-based Mobile Applications Mobilizes Computer-on-Module Applications With continuing miniaturization of processor technology, high-tech applications — whether ticket systems, diagnostic computers, or portable test devices — are becoming increasingly mobile. They all need an efficient power supply if this mobility is not to be hindered by power restrictions. By Andrea Mayer, Product Marketing [...]

Progress in Using Normally-off SiC JFET Power Transistors – The First Year

Posted on 17 July 2012

      Since the initial release of the normally-off SiC JFET in September 2008, much has been learned The 1200 V normally-off SiC JFET released in 2008 has generated market interest in applications including solar or photovoltaic (PV) inverters, server/telecom power supplies, industrial welding inverters, future electric drive automotive inverters, and even audio amplifiers. [...]

A New breakthrough in More Efficient Power Conversion

Posted on 17 July 2012

      Major design challenges of the deep trench epi filling technology Since making a high efficiency power supply means saving energy bills in the places like the data centers, it is not surprising that power supply manufacturers are focusing on designing a high efficiency power supply. In computing area desktop PCs and laptop [...]