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In order to study the electromagnetic force distribution in the core of stator and rotor of an asynchronous motor, we conducted 2-D electromagnetic analysis using time-stepping finite element method (FEM) to calculate the magnetic field. The moving conductor's eddy current was derived in detail in the Lagrangian coordinate system. Eulerian coordinate system and Lagrangian coordinate system are used...
This paper investigates a 3-D coupled-field finite-element method (FEM) used in simulation of temperature distribution in air-cooled asynchronous induction motor. The temperature rise in motor is due to Joule's losses in stator windings and the induced eddy current in squirrel cages, and heat dissipation by air convection and solid conduction. The Joule's losses calculated by 3-D eddy- current field...
In order to study the steady-state electromagnetic forces acting on the stator end-winding in a multi-phase induction machine during the operation, we conducted a 3-D electromagnetic analysis coupled with a 3-D mechanical analysis to analyze the stress and the deformation. Both of the analyses are done by the finite-element method. Meanwhile, the geometry of the nose portion is modified for the limited...
For stacked double-rail turn-augmented railgun, two pairs of sub-rails are stackedand. Each pair of sub-rails provide guidance for one armature, and the two armatures push forward together one projectile. While for plane single-rail turn-augmented, the augmented turns are arranged outside the main rails where one armature is placed. Since the existence of mutual inductance, launch performance of two...
Considering the magnetic nonlinear characteristic of iron core and its structural complexity, the calculation model of Multi-phase Synchronous Generator is established with nonlinear FEM. Then the method and analysis steps of no-load characteristics analysis and rated field current calculation are given in detail. On the basis of electromagnetic field calculation of the twelve-phase synchronous generator,...
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