Izvorni znanstveni članak
Numerical Simulation of Asynchronous E-motor with Field-Circuit Coupling
Marijan Marković
; Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu
Zvonimir Petranović
; AVL List GmbH, Graz, Austria
Milan Vujanović
; Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu
Sažetak
The focus of this work is a comparative analysis of two numerical methods for asynchronous electric motor simulations. Magnetic potential formulation is employed in each method separately, using Ansys Maxwell for finite element method and AVL FIRE M for finite volume method. 2D simulations are conducted on a Siemens squirrel cage induction motor validating the simulation results on the datasheet information form the manufacturer. Although axial symmetry is exploited for a 2D approach, 3D effects of a rotor cage are considered coupling the field and circuit equations. End ring resistance and inductance are fed directly into the solver which has been proven to increase the accuracy of the results from the regular 2D approach and is feasible in both methods. Torque results for both methods incorporating field-circuit coupling show discrepancies of less than 5% compared to the data from the manufacturer. Conversely, simulations omitting field-circuit coupling show higher torque discrepancies of more than 10%. Two initialization strategies are used to demonstrate the superior speed of the torque output with frequency domain initialization compared to the steady state case. Numerical results show excellent agreement between the numerical simulations and the data from the manufacturer. Also, convergence time is investigated varying mesh sizes for the finite volume method. Finally, it is shown that a faster convergence time is achieved employing the finite element method mainly since it was running with a coarser mesh not containing boundary layers.
Ključne riječi
Squirrel cage induction motor; magnetic potential; 2D simulations; finite volume method; frequency domain simulation
Hrčak ID:
328983
URI
Datum izdavanja:
10.3.2025.
Posjeta: 368 *