Title :
A method for dynamic simulation and detection of dynamic air-gap eccentricity in synchronous machines
Author :
Al-Nuaim, Nabil A. ; Toliyat, Hamid A.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
This paper presents the performance of salient pole synchronous machines with eccentric rotors. Relationships between stator current induced harmonics and dynamic eccentricity are investigated. The winding function theory accounting for all space harmonics in electric machines and presented by earlier researchers has been modified to adopt nonsymmetric air-gap for the calculation of machine winding inductances. In addition, the winding inductances have been computed by finite element method to support those calculated by the modified winding function approach (MWFA). Magnetic coupled circuits approach has been utilized for simulating rotor and stator currents. The simulation findings are in close agreement with experimental results
Keywords :
air gaps; finite element analysis; harmonics; inductance; machine theory; magnetic circuits; rotors; simulation; stators; synchronous machines; dynamic air-gap eccentricity; dynamic simulation; finite element method; machine winding inductances; magnetic coupled circuits; modified winding function approach; nonsymmetric air-gap; rotor currents simulation; salient pole synchronous machines; space harmonics; stator current induced harmonics; stator currents simulation; synchronous machines; winding function theory; Air gaps; Circuit simulation; Computational modeling; Coupling circuits; Electric machines; Finite element methods; Machine windings; Magnetic circuits; Stators; Synchronous machines;
Conference_Titel :
Electric Machines and Drives Conference Record, 1997. IEEE International
Conference_Location :
Milwaukee, WI
Print_ISBN :
0-7803-3946-0
DOI :
10.1109/IEMDC.1997.604067
