The selection criteria for a current transducer (see "Selecting Current Transducers") are also applicable to voltage transducers, especially when the voltage measurement is based on a ‘current measurement principle’. The main difference lies in the primary parameters which affect the link between the voltage to be measured and [...]
Design Notes - Varistors
17 May 2012
Below are several important design considerations regarding the use of varistors in power electronics applications. Physical protection - fuses Due to the unpredictable nature of transients a varistor may be overloaded although it was carefully selected to begin with. An Overload may result in package rupture and expulsion [...]
Thermal Dimensioning of Bridge Rectifiers
16 May 2012
The term bridge rectifier refers to a component which integrates every branch of a rectifier circuit in a single, compact case. Bridge rectifiers come in various case types for applications from just a few amps to several 100 A. With a few exceptions, heat losses are dissipated to [...]
Connection Systems
15 May 2012
Below is a description of the benefits and field of application for several electrical connection systems. Clamping Yoke Screw Connection The clamping-yoke connection is the most used screw connection in the world. Steel clamping yokes made by using a stamping and bending process guarantee a vibration proof [...]
Introduction to Closed Loop Hall Effect Current Transducers
14 May 2012
Construction and principle of operation While open loop current transducers amplify the Hall generator voltage to provide an output voltage, closed loop transducers use the Hall generator voltage to create a compensation current in a secondary coil to create a total flux, as measured by the Hall generator, [...]
Snubber Circuits Based on Silicon Avalanche Diodes
11 May 2012
Avalanche diodes can cope with reverse current pulses resulting in power dissipation in the low kW range. At a particular value of reverse voltage, an avalanche diode experiences avalanche breakdown, a process where normally good insulators are abe to conduct large currents. In high-voltage applications, avalanche rectifier diodes [...]
Terms and Descriptions - Varistors
10 May 2012
Below is a guide to terms commonly found in product tables and data sheets for varistors. Operating voltage Product tables generally specify maximum AC and DC operating voltages. These figures should only be exceeded by transients. Automotive types, however, are rated to withstand excessive voltage (jump start) for [...]
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Objectives of PowerGuru
Posted on 02 April 2012
After consultations between Epcos, LEM, Mersen, Proton, Semikron, SindoPower, and Weidmüller it was discovered that especially for small and medium customers the information base and customer care should be raised to a higher level (press release). Three main objectives were defined: provide neutral, company independent power electronics know-how give companies the opportunity to publish company [...]
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SEMIKRON Application Manual as eBook and printed Book
Posted on 01 April 2012
Today, IGBT and power MOSFET modules are instrumental in power electronic systems and are increasingly gaining ground in new fields. This goes hand in hand with the ever increasing need for rectifier diodes and thyristors as cost-efficient means of connecting to the power supply grid. This application manual is intended to assist users with [...]
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Infineon Reference book IGBT Modules printed version
Posted on 02 March 2012
Today, IGBT and power MOSFET modules are instrumental in power electronic systems and are increasingly gaining ground in new fields. This goes hand in hand with the ever increasing need for rectifier diodes and thyristors as cost-efficient means of connecting to the power supply grid. This application manual is intended to assist users with component [...]
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Teaching Tool for IGBTs and Thyristors
Posted on 03 February 2012
For educational purposes the 'SemiTeach IGBT' and 'SemiTeach Thyristor' are ideal tools for universities, professional schools and laboratorities to simulate and demonstrate curcuits. One stack can simulate almost all existing industrial applications: 3-phase inverter+brake chopper; buck or boost converter; single phase inverter; single or 3-phase rectifier. Features: Multi-function IGBT converter Transparent enclosure to [...]
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- Fuse Placement in Typical Converter Circuits
- Teaching Tool for IGBTs and Thyristors
- Large International Power Electronics Manufacturers
- Selecting Voltage Transducers
- Design Notes - Varistors
- Thermal Dimensioning of Bridge Rectifiers
- Connection Systems
- Introduction to Closed Loop Hall Effect Current Transducers
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