Results 211 to 220 of about 29,405 (266)
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Fundamentals of short-circuit protection for transformers
2010 63rd Annual Conference for Protective Relay Engineers, 2010This paper reviews principles of protection against internal short circuits in transformers of various constructions. Transformer fundamentals are reviewed as pertaining to protection. In particular, the electromagnetic circuit of a transformer is reviewed that links the terminal currents, winding currents, fluxes, and ampere-turns (ATs) in a set of ...
Bogdan Kasztenny +2 more
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A new method for fast short circuit protection of IGBTs
IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014This paper presents a new, simple and low cost method for fast short circuit protection of IGBT modules. The principle of the method is to measure the voltage across the inductance between the power-emitter and the auxiliary-emitter. Moreover, by modulating the gate-signal, the new method reduces the gate emitter voltage V ge in order to limit the ...
Ignacio E. Lizama +3 more
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Short circuit analysis and protection of power module IGBTs
Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005., 2005In this paper, the failure modes of power module IGBTs have been experimentally studied by focusing on the short-circuit behaviour of the devices, with reference to the hard switching fault (HSF) and fault under load (FUL) types of fault. In particular, the current ringing phenomenon, having an important influence on the short circuit behaviour of the ...
CHEN Y +4 more
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Short-Circuit Protection Circuits for Silicon-Carbide Power Transistors
IEEE Transactions on Industrial Electronics, 2016An experimental analysis of the behavior under short-circuit conditions of three different silicon-carbide (SiC) 1200-V power devices is presented. It is found that all devices take up a substantial voltage, which is favorable for detection of short circuits. A transient thermal device simulation was performed to determine the temperature stress on the
Diane-Perle Sadik +2 more
exaly +2 more sources
Protection circuit for MOSEFT in the short circuit event
International Journal of Electronics Letters, 2016A short circuit event is a basic and severe fault in power converters and other power electronic circuits.
Chuang Bi, Kelin Jia, Hui Li
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Short Circuit Protection of Energy-Efficient Motors
IEEE Industry Applications Magazine, 1997Many years ago, the National Electrical Code established a maximum setting for this instantaneous trip breaker of seven times motor full load amperes (FLA), the theory being that that value was just above the typical 6X locked rotor current. In a 1986 IEEE IAS paper Scheda noted that the two most commonly encountered problems in applying high ...
Dennis W. Heath, H.L. Bradfield
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Short-circuit protection in Off-Grid system
2014 14th International Conference on Environment and Electrical Engineering, 2014Renewable sources of electric energy belong to key areas in research and development in recent years. This course leads to the design and development of autonomous power units, which are subject to specific requirements, so-called Off-Grid systems, designed as power supply for energy self-sufficient houses.
Jakub Kosmak +4 more
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A discussion on IGBT short-circuit behavior and fault protection schemes
IEEE Transactions on Industry Applications, 1995IGBTs are available with short-circuit withstand times approaching those of bipolar transistors. These IGBTs can therefore be protected by the same relatively slow-acting circuitry. The more efficient IGBTs, however, have lower short-circuit withstand times.
R. Chokhawala, J. Catt, L. Kiraly
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Current sensing in IGBTs for short-circuit protection
Proceedings of the 6th International Symposium on Power Semiconductor Devices and Ics, 2002Short circuit protection can be provided for IGBTs by using a current-sensing scheme. The performance and accuracy of integrated current sensors on IGBTs can be affected by the layout of the sense device. Data is presented on current-sense IGBTs and an improved layout is proposed to increase the accuracy of the sensor.
S.P. Robb, A.A. Taomoto, S.L. Tu
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Adaptive protection of short circuits in transmission lines
2009 Chinese Control and Decision Conference, 2009This paper proposes an adaptive protection scheme which has been developed through the analysis of short circuits in transmission lines. The method assumes a different protection pattern depending upon the distance between the fault position and the location of any protection devices.
null Yanzhe Li +4 more
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