Results 21 to 30 of about 12,322 (303)

Analysis and fault-tolerant control of inter-turn short-circuit fault for five-phase permanent-magnet synchronous machine

Energy Reports, 2022
For the demand of high reliability in the aerospace field, multi-phase electric machines have become a research hotspot for the fault-tolerant ability. Inter-turn short-circuit fault is one of the main fault forms in the electric machine.
Zaiping Zheng, Qiqi Li, Xuyang Li, Ping Zheng, Kaichun Wang, Peijuan Cui   +5 more
doaj   +1 more source

Design of high-power intrinsically safe power supply based on fault current change rate

Gong-kuang zidonghua, 2021
In order to solve the problems of low output power, poor protection effect, and slow dynamic response speed of existing intrinsically safe power supply, a high-power intrinsically safe power supply based on fault current change rate is designed.
KANG Qian, XU Chunyu, TIAN Muqin, SONG Jiancheng   +3 more
doaj   +1 more source

Forces and Stresses in the Windings of a Superconducting Fault Current Limiter

Energies, 2022
This paper presents the design of a Superconducting Fault Current Limiter (SFCL) and calculation results of forces and stresses in the windings of a resistive fault current limiter.
Janusz Kozak
doaj   +1 more source

Calculation method of external fault short-circuit current for variable-speed pumped storage units based on time-domain dynamic circuit

Frontiers in Energy Research, 2023
The calculation method of the external fault short-circuit current of large units with clear mechanisms and practicality is of great value in engineering practice.
Rufei He, Qinghui Lu, Yiming Ma, Jian Qiao, Yongqi Li, Yumin Peng, Xianggen Yin, Yao Li   +7 more
doaj   +1 more source

A short circuit current evaluation method based on the branch fault current of the circuit breaker

Zhejiang dianli, 2023
With the rapid load growth and the increasing density of power grids， the overrun short-circuit current becomes increasingly aggravated. To accurately assess the short-circuit current level of the system is crucial to ensure the safe and stable operation
DONG Wei, HUA Wen, SHENTU Leixuan, ZHOU Jinghao, WANG Longfei, WANG Bowen   +5 more
doaj   +1 more source

A change-detection algorithm for short-circuit fault detection in closed-loop AC drives [PDF]

, 2013
This paper deals with an on-line method for turn-to-turn short-circuit fault detection in low-voltage permanent-magnet synchronous machine drives. Due to the closed-loop control, the fault effects are reflected in the voltage.
Johan Gyselinck, Gyselinck, Johan, KESTELYN, Xavier, Semail, Eric, Eric Semail, Yves Mollet, Meinguet, Fabien, Kestelyn, X., Mollet, Yves, Fabien Meinguet, Xavier Kestelyn   +10 more
core   +1 more source

Fault-Tolerant Operation of an Open-End Winding Five-Phase PMSM Drive with Inverter Faults [PDF]

, 2013
The authors would like to thank the ADEME for the funding of the MHYGALE project.Multi-phase machines are known for their fault-tolerant capability. However, star-connected machines have no fault tolerance to inverter switch short-circuit fault.
NGUYEN, Ngac Ky, Ngac-Ky Nguyen, KESTELYN, Xavier, SEMAIL, Eric, Paul Sandulescu, Eric Semail, Nguyen, Ngac-Ky, SANDULESCU, Paul, MEINGUET, Fabien, Fabien Meinguet, Xavier Kestelyn   +10 more
core   +1 more source

Research on a fault current limiter based on variable reactor

Zhejiang dianli, 2022
With the increase of the power load in power grid， the short circuit level continues to rise， and excessive short-circuit current will do great damage to power equipment and imperil power systems.
GU Yu, CHENG Guanji, LU Song, LI Dongdong   +3 more
doaj   +1 more source

Analytical Optimal Currents for Multiphase PMSMs Under Fault Conditions and Saturation [PDF]

, 2014
An original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions.
NGUYEN, Ngac Ky, KESTELYN, Xavier, FLIELLER, Damien, SEMAIL, Eric, Eric Semail, Ngac Ky Nguyen, Damien Flieller, Tiago Jose dos Santos Moraes, Xavier Kestelyn   +8 more
core   +1 more source

Short circuit fault identification and diagnosis analysis of rotor winding for variable speed pumped storage unit

Energy Reports, 2022
Rotor winding short circuit is a frequent fault type of generator unit. Compared with the traditional fixed-speed unit using DC excitation, the three-phase AC excitation structure of the variable speed pumped storage unit is more complicated, and the ...
Qinghui Lu, Xianggen Yin, Jian Qiao, Yikai Wang, Liming Tan, Lingjin Zhu   +5 more
doaj   +1 more source