Category | Selection of Components

650V Rapid Diode for Industrial Applications

Posted on 02 May 2013

              With the introduction of Rapid Diodes, Infineon Technologies enters the hyperfast fast high voltage silicon diode market. Based on ultrathin wafer technology, two families are released to cover different application requirements. Rapid 1 is used in low switching applications (up to 40 kHz) whilst the Rapid 2 is [...]

Fast IGBT based on TRENCHSTOP™5 technology for industrial applications

Posted on 29 April 2013

              Historically, fast IGBTs have been proposed as the replacement of conventional or Superjunction MOSFETs due to higher power density. However, because of technology limitations, there are only limited areas where IGBTs can reach both commercial and technical advantages. The new TRENCHSTOPTM5 IGBT overcomes many of those technical limitations, [...]

Gate Current and Gate Voltage Characteristics for Drivers

Posted on 18 January 2013

              The switching behavior of MOSFET and IGBT modules can be largely controlled by the gate capacitance recharge speed (i.e., in this case: gate capacitance = input capacitance CGE + CCG). In theoretical borderline cases, the gate capacitance recharge may be controlled by resistance, voltage, or current (Figure 1). [...]

How To Read A Fuse Time-Current Curve

Posted on 16 October 2012

  A time-current characteristic curve, for any specified fuse, is displayed as a continuous line representing the average melting time in seconds for a range of overcurrent conditions. The melting time is considered nominal unless noted otherwise. Several curves are traditionally shown on one sheet to represent a family of fuses. The family shown below [...]

Varistor for electromagnetic compatibility

Calculation Example: Ensuring EMC of Equipment Connected to 230V Lines

Posted on 17 July 2012

              The following calculation example describes the selection procedure for a varistor in order to ensure that the electromagnetic compatibility (EMC) of a device is met in accordance with IEC 61000-4-5  for 230 V operating voltage and a test voltage of 4 kV. Figure 1. EMC test in accordance [...]

Successful Selection of Power Modules

Posted on 20 June 2012

              Successful selection of power modules for specific applications in every stationary and short-time operating condition depends on three factors. The first main factor is the voltage carrying capability. Second is the current carrying capacity of transistors and freewheeling diodes under the feasible cooling conditions and in conjunction with [...]

Selecting Power Components

Posted on 06 June 2012

              When selecting power components for specific applications, certain factors have to be considered. These factors include the component voltage and current ratings under the possible cooling conditions, as well as the permissible operating ranges. These factors have to be looked at in every possible stationary and short-time operating [...]

Selecting Voltage Transducers

Posted on 18 May 2012

              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 [...]

Selecting Current Transducers

Posted on 08 May 2012

              The article "Transducers - Basic Principles of Selection" outines general criteria for selection of tranducers. Below is a more detailed listing of important criteria to be considered when choosing a suitable current transducer for a given application. Some applications of current transducers have a high level of complexity [...]

Transducers - Basic Principles of Selection

Posted on 07 May 2012

              Use of current and voltage transducers in power electronics applications covers a broad range. Transducers are widely used in industrial applications, electric traction, energy distribution, automation markets, the automotive sector, and in battery monitoring. The selection of a transducer is the result of a technical and economic trade-off, [...]