Power Electronic Devices
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What is holding current in SCR? It is the minimum current required to hold the SCR in forward conduction state. When the forward current becomes less than holding current, SCR turns from forward conduction state to forward blocking state. What is latching current in SCR? It is the minimum current required to latch turn on the SCR from forward blocking state to forward conduction state.
Power electronics deals with highly efficient and controllable conversion of electric power. It is found in renewable energy production, electricity transmission, electric transportantion, power supplies, industrial motor drives, electric energy storage, ligthting applications, etc. The power electronics group at KTH focuses on high-power electronics for grid applications and silicon carbide power electronics. High power electronics concern large scale power conversion with converters in the range of tens of megawatts up to gigawatts. Typical applications range from large motor drives and railway power supplies to high voltage direct current HVDC links used for long distance power transmission. KTH has for many decades conducted research into this field, starting out already in the era of mercury-arc valves. In later years, research has been focused on modular multilevel converters MMCs since these are rapidly being adopted in many applications that are important for our industrial partners.
Skip to Main Content. While both vacuum and solid-state electronics continue to evolve and provide unique solutions, emerging commercial and military applications that call for higher power and higher frequencies to accommodate massive volumes of transmitted data are the natural domain of vacuum electronics technology. Modern Microwave and Millimeter-Wave Power Electronics provides systems designers, engineers, and researchers—especially those with primarily solid-state training—with a thoroughly up-to-date survey of the rich field of microwave vacuum electronic device MVED technology. This comprehensive text explores a wide range of topics: Traveling-wave tubes, which form the backbone of satellite and airborne communications, as well as of military electronic countermeasures systems Microfabricated MVEDs and advanced electron beam sources Klystrons, gyro-amplifiers, and crossed-field devices "Virtual prototyping" of MVEDs via advanced 3-D computational models High-Power Microwave HPM sources Next-generation microwave structures and circuits How to achieve linear amplification Advanced materials technologies for MVEDs A Web site appendix providing a step-by-step walk-through of a typical MVED design process Concluding with an in-depth examination of emerging applications and future possibilities for MVEDs, Modern Microwave and Millimeter-Wave Power Electronics ensures that systems designers and engineers understand and utilize the significant potential of this mature, yet continually developing technology. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Personal Sign In.
Power Electronics: Devices, Circuits and Industrial Applications would serve as an Circuits, and Industrial Applications by V. R. Moorthi Free PDF d0wnl0ad.
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Power electronics is the application of solid-state electronics to the control and conversion of electric power. The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes , thyristors and transistors , pioneered by R. Middlebrook and others beginning in the s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive VSD that is used to control an induction motor.