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Numerical Calculation of the Dynamic Behavior of Asynchronous Motors with COMSOL Multiphysics

J. Güdelhöfer1 R. Gottkehaskamp1 A. Hartmann1
1Department of Electrical Machines and Electromagnetic Field Theory, University of Applied Sciences Düsseldorf, Düsseldorf, Germany

Contour of the z-component of the magnetic vector potential at a particular time at the end of the start up.

This paper shows how a time-dependent and non-linear simulation of the dynamic operation behavior of an induction machine is executed by means of the "Rotating Machinery" interface from COMSOL Multiphysics 4.2a. The two-dimensional FEM model is connected to electrical circuits by coupling the physics "Rotating Machinery" and "Electrical Circuit" interfaces. These circuits include the lumped electrical components to simulate the electrical effects in the end area as well as the three-phase-voltage system to supply the stator. Simulations are made for constant slip values as well as dynamical start-up with an additionally defined equation of motion as an ordinary differential equation by means of the "Global ODEs and DAEs" interface.

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