Title :
Calculation of slot harmonic effects in induction motors by finite element method
Author :
Canova, A. ; Ragusa, C.
Author_Institution :
Politecnico di Torino, Italy
Abstract :
This paper proposes the use of the two-dimensional finite element method (2-D FEM) for simulating squirrel cage induction motors taking into account slot harmonic effects. A series of linear field solutions provide the stator-rotor inductance matrix which takes into consideration the anisotropy of the magnetic structure, including stator and rotor slots, besides winding distributions. Successively, the procedure consists in decomposing each self and mutual inductance by Fourier analysis. Finally, the inductance harmonic matrix is inserted in the circuit equation and stator and rotor currents and electromechanical torque can be calculated. The model was tested on two motors having different combinations of slot numbers and simulation results are compared with those obtained by analytical and experimental procedure
Keywords :
Fourier analysis; finite element analysis; harmonics; machine theory; matrix algebra; rotors; squirrel cage motors; stators; torque; 2-D FEM; Fourier analysis; circuit equation; electromechanical torque; inductance harmonic matrix; linear field solutions; magnetic structure anisotropy; mutual inductance; rotor currents; self inductance; slot harmonic effects; slot numbers; squirrel cage induction motors; stator currents; stator-rotor inductance matrix; two-dimensional finite element method;
Conference_Titel :
Electrical Machines and Drives, 1995. Seventh International Conference on (Conf. Publ. No. 412)
Conference_Location :
Durham
Print_ISBN :
0-85296-648-2
DOI :
10.1049/cp:19950840
