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  • Special Thermistors Limit Inrush Current
    High inrush current can be produced when equipment is turned on. If steps are not taken to minimize this inrush current, it can damage power devices and reduce equipment life. A safe and cost effective way to reduce inrush current is to use an inrush current limiter (Surge Limiter), which
  • AN3010: An Examination of Recovery Time of an Integrated Limiter/LNA
    noise figure, a high power and low loss limiter is required. The purpose of this application note is to document the test methodology employed and test results achieved measuring the small-signal gain recovery time of a balanced LNA with an integrated Schottky diode limiter and high power load
  • Next-Generation Miniature High Voltage Power Modules
    XP EMCO next-generation, miniature high voltage power modules provide designers and end-users. ever-expanding choices for off-the-shelf, drop-in miniature solutions to meet their high voltage needs. The next-generation of high voltage power modules features more watts per cubic inch, reduced power
  • Power Solution for Rail Transit
    Abstract: China has the world's largest high-speed rail network as long as 20,000 km so far, which not only comprehensively enhances the quality of China's road network but also further develops the regional economy coordinately. It constantly challenges the limits of technology and the natural
  • Protecting Switching Power Supplies from Inrush Current
    Power Thermistor offers high resistance at the beginning of switching and limits the inrush current. After a short time, the NTC Power Thermistor resistance decreases to a low value due to self heating and does not affect normal operation.
  • Soft-Start Controller For Switching Power Supplies
    . The large feedback error then drives the loop filter to its limit, which drives the power switching transistors in the driver section of the power supply at their maximum rating. This condition continues until the output voltage of the power supply approaches its nominal value. If the load being
  • Download The White Paper of Railway Power Supply
    Every year, countries across the world are investing billions of dollars in high-speed railways. These evolving. railways require power solutions that push the limits of technological innovation while still meeting railway. standards. One example of the challenges and solutions found in railway
  • Power supplies for the next generation of CompactPCI systems
    out voltage fluctuations and interference. Also important for the. system is an output current limiter for safety purposes. This prevents, for example, a. damagingly high current flow in the event of a short circuit on a board. Other technical. requirements for PSUs are overvoltage protection
  • Designing Redudancy into the Critical Data Power System
    . Preventive maintenance must be performed, and the resulting scheduled downtime limits the availability of the power system. Remember: Deferred maintenance is not the same as high availability. Now the Good News: Certain UPS system configurations permit concurrent maintenance - supporting the load
  • Fiber optic temperature solutions for generator and transformer
    Due to the growing demand of energy existing power plants and grids are stretched to their limits. To ensure operational safety, critical factors such as temperature has to be monitored in generators and transformers. High power generators are often filled with hydrogen in order to cool effectively
  • Fins for Cooling Success
    As high-power electronics continue to push power density limits, component design engineers are facing greater challenges and trade-offs in their choice for cooling solutions. One way to meet these challenges and trade-offs is through the engineering of fin geometry and fin density of heat transfer
  • Tales from the Front: Applying Fieldbus at Genzyme, Part 1
    spaces, due to its high power requirements. For this reason, we opted for Profibus-DP to handle open/close valving and discrete input devices in electrically classified environments with intrinsically safe remote I/O. Either Profibus-DP or DeviceNet could address single-speed and variablespeed motors
  • Beryllia Ceramic BeO Metallization
    The thermal conductivity of BeO ceramics is very high, which is comparable to that of some metal materials; it also has the advantages of high-temperature resistance, high-pressure resistance, high strength, and low dielectric loss, which meets the requirements of power devices for insulation
  • Phase Conjugate Laser Optics - Preface
    be applied in LIDAR. imaging systems, for ground or space communications or for monitoring of the. atmosphere. All these applications clearly require sources delivering high-quality. optical beams whose divergence must not exceed the diffraction limit during beam. propagation. In other terms, the wavefront
  • Gate Drive Optocoupler Provides Robust Insulation in IGBT Destructive Tests
    to reject high common mode noise (CMR) and prevent erroneous driving of the IGBTs. But in order not to compromise the optocoupler insulation barrier, power safety limits must not be exceeded in the event of component failure by protective circuits in application. This can be extremely difficult
  • Application Note: Transient Suppression Devices & Principles (.pdf)
    it from propagating away from its source or keeping it from impinging on a sensitive load is accomplished with filters inserted in series within a circuit. The filter, generally of the low-pass type, attenuates the transient (high frequency) and allows the signal or power flow (low-frequency