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Electromagnetic Forces and Mechanical Responses of Stator Windings before and after Rotor Interturn Short Circuit in Synchronous Generators
- Source :
- Mathematical Problems in Engineering, Vol 2020 (2020)
- Publication Year :
- 2020
- Publisher :
- Hindawi Limited, 2020.
-
Abstract
- This paper studies the stator winding electromagnetic force behaviors before and after rotor inter-turn short circuit (RISC) in synchronous generator. Different from other studies, this paper not only studies the electromagnetic force characteristics, but also investigates the mechanical responses, the damage regularity, and the countermeasure of the stator winding. Firstly, formulas of electromagnetic force online and end part are obtained. Then, a 3D finite element model of a 3-pair-pole simulation generator is applied to get the electromagnetic force, and the dangerous stator slot is found. Finally, the mechanical response of each end winding is acquired, and especially the directional deformations of nose part are calculated. It shows that the occurrence of RISC will bring in times of rotor rotating frequency components to electromagnetic force, but the DC component and 2p times of rotor rotating frequency components are still the main that will be decreased. Additionally, the winding insulation wear in the same layer is more serious than that in a different layer, nose fatigue fracture begins with the center, and nose insulation wear starts from the top.
- Subjects :
- 010302 applied physics
Physics
Article Subject
Stator
Rotor (electric)
General Mathematics
020208 electrical & electronic engineering
General Engineering
Mechanical engineering
02 engineering and technology
Permanent magnet synchronous generator
Engineering (General). Civil engineering (General)
01 natural sciences
Finite element method
law.invention
Generator (circuit theory)
law
Electromagnetic coil
0103 physical sciences
QA1-939
0202 electrical engineering, electronic engineering, information engineering
TA1-2040
Short circuit
Mathematics
DC bias
Subjects
Details
- ISSN :
- 15635147 and 1024123X
- Volume :
- 2020
- Database :
- OpenAIRE
- Journal :
- Mathematical Problems in Engineering
- Accession number :
- edsair.doi.dedup.....942472242373d769dac6a3ae059c3031