Results 41 to 50 of about 335,047 (274)

Turn-to-turn fault protection technique for synchronous machines without additional voltage transformers [PDF]

, 2017
This paper presents a novel protection technique for the detection of inter-turn faults in synchronous machines. It is based on the calculation of voltage in the stator windings from the usual phases and neutral voltage, typically available in ...
Gyftakis, Konstantinos N., Platero , Carlos A., Redondo, Marte   +2 more
core   +1 more source

Calculation and Analysis of Rotor Thermal Static Field for Inter-Turn Short Circuit of Large Hydro-Generator Excitation Winding

Energies, 2019
Rotor winding inter-turn short circuit a common fault in hydro-generators. This fault would change the temperature, stress, and other thermal fields of a rotor and threaten the safe operation of the generator.
Junqing Li, Luo Wang
doaj   +1 more source

Induction methods used in low temperature physics [PDF]

, 1975
A study has been made of induction bridges used in low temperature physics.\ud \ud In Part 1 the design of a mutual inductance bridge of the Hartshorn type is discussed.
Caspari, M., Klundert, L.J.M. van de, Marel, L.C. van der, Rooij, C. de   +3 more
core   +2 more sources

Improved transient simulation of salient-pole synchronous generators with internal and ground faults in the stator winding [PDF]

, 2005
An improved model for simulating the transient behavior of salient-pole synchronous generators with internal and ground faults in the stator winding is established using the multi-loop circuit method.
Bi, D.Q., Howe, D., Wang, W.J., Wang, X.H., Zhu, Z.Q.   +4 more
core   +1 more source

An accurate inter-turn short circuit faults model dedicated to induction motors

International Journal of Electrical and Computer Engineering (IJECE), 2021
Safety, disponibility and continuity of industrial systems are major issue in maintenance. In the last decades, these points are the important axes in the field of research. In fact, in many industrial processes research has picked up a fervent place and a particular importance in the area of fault diagnosis of electrical machines, in fact, a fault ...
Fatima Babaa, Ouafae Bennis
openaire   +2 more sources

Experimental Methods and Equivalence Research on Inter-Turn Short Circuits in Power Transformers

Energies
Inter-turn short-circuit faults in power transformers generate enormous short-circuit currents within the affected turns, making full-scale experimental investigations impractical.
Xuelong Li, Chun Yang, Yuanming Shuai, Dongyang Wu, Zhengyang Zhang, Lanjun Yang   +5 more
doaj   +1 more source

Less-conventional low-consumption galvanic separated MOSFET-IGBT gate drive supply [PDF]

, 2017
A simple half-bridge, galvanic separated power supply which can be short circuit proof is proposed for gate driver local supplies. The supply is made while hacking a common mode type filter as a transformer, as the transformer shows a good insulation, it
Bikorimana, Jean Marie Vianney, Van den Bossche, Alex   +1 more
core   +3 more sources

Influence of the Load on the Impulse Frequency Response Approach Based Diagnosis of Transformer’s Inter-Turn Short-Circuit

IEEE Access, 2020
Frequency Response Analysis (FRA) is an Off-line condition monitoring technique for the transformers and is successful, in diagnosing mechanical faults and inter-turn short-circuits.
Natarajan Shanmugam, Balasubramanian Madanmohan, Rajesh Rajamani   +2 more
doaj   +1 more source

Quantum critical states and phase transitions in the presence of non equilibrium noise [PDF]

, 2010
Quantum critical points are characterized by scale invariant correlations and correspondingly long ranged entanglement. As such, they present fascinating examples of quantum states of matter, the study of which has been an important theme in modern ...
A Kamenev, A Mitra, A Polkovnikov, A Schmidt, AJ Daley, AJ Leggett, AO Cladeira, C Kollath, CL Kane, D Clément, D Porras, DE Feldman, Ehud Altman, Emanuele G. Dalla Torre, Eugene Demler, FDM Haldane, G Ithier, G Morigi, G Refael, G Zimmerli, I García-Mata, J Clarke, J Labaziewicz, J Steinhauer, J Stenger, K Winkler, K-K Ni, L Deslauriers, MPA Fisher, R Blatt, S Chakravarty, S Diehl, S Sachdev, SL Sondhi, T Antal, T Giamarchi, T Lahaye, Thierry Giamarchi   +37 more
core   +3 more sources

Interturn short circuit fault diagnosis method of direct-drive permanent magnet synchronous motor based on two-stage PNN

河南理工大学学报. 自然科学版
ObjectivesAccurate positioning of early faults is crucial for preventing the deterioration of motor system faults and formulating operation and maintenance strategies after faults.MethodsAiming at the problem that the inter-turn short-circuit fault ...
GAO Caixia, FENG Lingyun, DANG Jianjun
doaj   +1 more source