Numerical Calculation of Short Circuit Electromagnetic Force in Isolated Phase Bus

2014 ◽  
Vol 986-987 ◽  
pp. 944-947
Author(s):  
Tusong Jiang Kari ◽  
Xi Wang Abuduwayiti ◽  
Ming Ma
Keyword(s):  
Numerical Calculation ◽  
Periodic Function ◽  
Phase Angle ◽  
Proximity Effect ◽  
Electromagnetic Force ◽  
Short Circuit ◽  
Current Phase ◽  
Transient Method ◽  
Set Up ◽  
Short Circuit Condition

Short circuit electromagnetic forces are one of the most important factors in design and operation of buses. 2D infinite element models are set up with ANSOFT for isolated phase buses, simulating with transient method and calculating short circuit electromagnetic force taking eddy effect and proximity effect into account. The result reveals that the maximum electromagnetic force under short circuit condition is a periodic function of current phase angle.

Fault Localization of Power-Ground Short via Signal Injection and Oscilloscope Technique

2010 ◽  
Author(s):  
Binh Nguyen
Keyword(s):  
Low Cost ◽  
Short Circuit ◽  
Fault Localization ◽  
Fault Isolation ◽  
Test Apparatus ◽  
Good Working ◽  
Signal Injection ◽  
Set Up ◽  
Non Destructive ◽  
Short Circuit Condition

Abstract For those attempting fault isolation on computer motherboard power-ground short issues, the optimal technique should utilize existing test equipment available in the debug facility, requiring no specialty equipment as well as needing a minimum of training to use effectively. The test apparatus should be both easy to set up and easy to use. This article describes the signal injection and oscilloscope technique which meets the above requirements. The signal injection and oscilloscope technique is based on the application of Ohm's law in a short-circuit condition. Two experiments were conducted to prove the effectiveness of these techniques. Both experiments simulate a short-circuit condition on the VCC3 power rail of a good working PC motherboard and then apply the signal injection and oscilloscope technique to localize the short. The technique described is a simple, low cost and non-destructive method that helps to find the location of the power-ground short quickly and effectively.

scholarly journals Analysis of Electromagnetic Force on Rotor End Windings of a 300 MW Variable-Speed Generator Motor for Pumped Storage

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Zhaowei Qiao ◽  
Yutian Sun
Keyword(s):  
Electromagnetic Force ◽  
Large Scale ◽  
Short Circuit ◽  
Element Model ◽  
Variable Speed ◽  
Distribution Map ◽  
3D Finite Element ◽  
Three Phase ◽  
Set Up ◽  
Pumped Storage

The variable-speed generator motor (VSGM) for pumped storage has a cylindrical rotor with three-phase lap or wave windings distributed in slots evenly and fed by a converter. For a large-scale VSGM, the electromagnetic force (EMF) on rotor end windings is an important contributor to distortion, vibration, and even damage of rotor end windings. A 3D finite element model of rotor end region of a 300 MW VSGM is set up. The distribution map of EMF density on involute and nose parts of rotor end windings, under rated load and three-phase short circuit at supersynchronous and subsynchronous speed, is drawn. Furthermore, the amplitude of EMF is calculated, and the radial, tangential, and axial components of EMF are analyzed. The results in this paper will lay a foundation for design of rotor end windings and their support structure.

scholarly journals Reduction of Electromagnetic Force in AC Distributed Winding of Fault Current Limiter under Short-Circuit Condition

2015 ◽  
Vol 20 (4) ◽  
pp. 400-404 ◽  
Author(s):  
Asef Ghabeli ◽  
Mohammad Yazdani-Asrami ◽  
Aref Doroudi ◽  
S. Asghar Gholamian
Keyword(s):  
Electromagnetic Force ◽  
Short Circuit ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Current Limiter ◽  
Short Circuit Condition

Numerical Analysis on Short-Circuit Force Parameters of Windings for Power Transformer

2011 ◽  
Vol 138-139 ◽  
pp. 764-769
Author(s):  
Jian Jun Liu ◽  
Jian Min Wang ◽  
Chong You Jing ◽  
Chang Zai Fan ◽  
Yuan Zhai
Keyword(s):  
Magnetic Field ◽  
Numerical Analysis ◽  
Power Transformer ◽  
Short Circuit ◽  
Strength Test ◽  
Power Transformers ◽  
Simplified Model ◽  
Leakage Magnetic Field ◽  
Set Up ◽  
Short Circuit Condition

The Simplified model of both calculating leakage magnetic field and mechanical force of windings at short circuit condition for a 120MVA/220kV power transformer is set up. The leakage magnetic field ‚ short-circuit force and stress in transformer windings are analyzed and their distributing characteristics are acquired respectively by using FEM. The calculation method and results are validated by withstanding short circuit strength test of the product. A number of useful suggestions are given for design of power transformers.

scholarly journals Simplified Predictive Stator Current Phase Angle Control of Induction Motor With a Reference Manipulation Technique

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 54173-54183
Author(s):  
Arash Fereidooni ◽  
S. Alireza Davari ◽  
Cristian Garcia ◽  
Jose Rodriguez
Keyword(s):  
Induction Motor ◽  
Phase Angle ◽  
Current Phase ◽  
Stator Current

scholarly journals Short-Circuit Capability Exploration of Silicon Carbide Devices

2015 ◽  
Vol 821-823 ◽  
pp. 810-813 ◽  
Author(s):  
Maxime Berthou ◽  
Dominique Planson ◽  
Dominique Tournier
Keyword(s):  
Silicon Carbide ◽  
Short Circuit ◽  
Electronic Systems ◽  
Power Electronic ◽  
Power Transistor ◽  
Power Transistors ◽  
Capacitive Load ◽  
Short Circuit Condition

With the commercial availability of SiC power transistors, this decade will mark an important breakthrough in power transistor technology. However, in power electronic systems, disturbances may place them in short-circuit condition and little knowledge exist about their SC capability. This paper presents our study of SiC MOSFETs, JFETs and BJT under capacitive load short-circuit up to 600V.

Magneto-Thermo-Structural Analysis of Power Transformers under Short Circuit Condition

2021 ◽  
Author(s):  
Antonio R. M. Sousa ◽  
Wellington Da S. Fonseca ◽  
Marcus V. A. Nunes ◽  
Ramon C. F. Araujo ◽  
Diorge de S. Lima
Keyword(s):  
Structural Analysis ◽  
Short Circuit ◽  
Power Transformers ◽  
Short Circuit Condition
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