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2 Journal of Technical Physics

2 2002

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The application of the finite element method in diagnostics of electrical drives

Fiser R., Ferkolj S.

Journal of Technical Physics

2002

Vol. 43, no 4

399-403

The paper presents the application of the finite element method for predicting the performance of induction motor having asymmetry of stator and/or rotor winding due to the different combination and propagation of faults gained during heavy-duty operation. Quantities like magnetic vector potential, flux density, force components, rotor and stator currents, mutual and leakage inductance are determined very precisely. The detailed insight in magnetic field distribution of a squirrel cage induction motor, forms the basis for further evaluation of its operational behaviour. Increasing anomaly in magnetic field distribution due to the increasing stage of faults propagation results in a degradation of steady-state and dynamic performance of the induction motor and can be evaluated with computer simulation eliminating expensive and time-consuming laboratory tests.

Calculation of linear induction motor performance using finite element method

Bugeza M., Fiser R., Ferkolj S.

Journal of Technical Physics

2002

Vol. 43, no 4

369-375

The paper presents the calculation of a linear induction motor steady-state and dynamic characteristics using the finite element method. The 2D nonlinear eddy-current solver was used for magnetic field and force calculations. Quantities like magnetic vector potential, flux density, force components, primary and secondary currents, mutual and leakage inductance, can be determined very precisely. The detailed insight in magnetic field distribution of a linear induction motor forms the basis for evaluation of its operational behaviour. The results obtained by the finite element method are further used in the process of the mathematical modelling and control simulation based on the space vector theory.