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This paper proposes a novel modular linear primary permanent-magnet vernier (LPPMV) machine. With PMs and windings placed on the primary side, this machine possesses a simple secondary side, suitable for long stroke applications such as urban rail transit. Owing to its appropriate primary structure and the Halbach PM arrays, the proposed LPPMV machine offers higher force density, higher back-EMF and...
Electromagnetic force can seriously damage end windings of large generators, especially involute part of the end windings. This paper focuses on a 1550 MW nuclear generator. 3D time-step finite element method is used to calculate the electromagnetic forces on involute part at both rated and leading phase operation. The most vulnerable parts are pointed out, forces on these parts are analyzed in detail...
This paper presents the investigations of short-circuit current, electromagnetic force, and transient dynamic response of windings deformation including mechanical stress, strain, and displacements for an oil-immersed-type 220-kV power transformer. The worst-case fault with three-phase short-circuit happening simultaneously is assumed. A considerable leakage magnetic field excited by short-circuit...
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