Title :
A new analytical method for the computation of air-gap reactances in 3-phase induction motors
Author :
Ionel, Dan M. ; Cistelecan, Mihai V. ; Miller, Timothy J E ; McGilp, Malcolm I.
Author_Institution :
SPEED Lab., Glasgow Univ., UK
Abstract :
The method presented in the paper includes a generalized analysis of the air-gap MMF based on the equivalent linear current density at the slot opening. A detailed nonlinear magnetic circuit model of the motor cross-section geometry is excited with the fundamental MMF, solved in polar coordinates and the results used to calculate the magnetizing reactance. The contribution of all the air-gap MMF harmonics, apart from the electric fundamental, is added in order to compute the differential leakage reactance. The method has been implemented on computer and has provided better results than some of the classical methods on several test motors.
Keywords :
air gaps; electric reactance; harmonics; induction motors; machine theory; magnetic circuits; 3-phase induction motors; air-gap MMF harmonics; air-gap reactances; differential leakage reactance; equivalent linear current density; magnetizing reactance; motor cross-section geometry; nonlinear magnetic circuit model; polar coordinates; slot opening; Air gaps; Conductors; Current density; Geometry; Induction motors; Laboratories; Magnetic analysis; Magnetic circuits; Performance analysis; Solid modeling;
Conference_Titel :
Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE
Conference_Location :
St. Louis, MO, USA
Print_ISBN :
0-7803-4943-1
DOI :
10.1109/IAS.1998.732260
