1. Improved analytical computation of rotor rectangular slot leakage inductance in squirrel-cage induction motors
- Author
-
Alberto Tessarolo, Lorenzo Branz, Claudio Bruzzese, Mauro Bortolozzi, IEEE, Bortolozzi, Mauro, Branz, Lorenzo, Tessarolo, Alberto, and Bruzzese, Claudio
- Subjects
Engineering ,Xenon ,squirrel-cage induction motor ,squirrel cage motors ,squirrel cage motor ,bars ,finite element analysis ,electric machinery ,Poisson equation ,Analytical method ,inductance ,bar ,Mathematical model ,Radio frequency ,Yttrium ,Induction motor ,Leakage (electronics) ,equivalent circuit parameters ,rotor leakage inductance ,equivalent circuit ,Finite element method ,rotors ,Inductance ,Poisson's equation ,rectangular-shaped bars ,rotor rectangular slot leakage inductance improved analytical computation ,squirrel cage induction motors ,equivalent circuits ,magnetic leakage ,FEA ,slot domain ,time-consuming finite-element analyses ,Induction motors ,Analytical methods ,rectangular-shaped bar ,analytical methods ,Control theory ,Electronic engineering ,equivalent circuit parameter ,Leakage inductance ,business.industry ,Squirrel-cage rotor ,finite element analysi ,time-consuming finite-element analyse ,Equivalent circuit ,rotor ,business - Abstract
Squirrel-cage induction motors are the most widely used type of electric machinery in industrial applications thanks to their rugged, cheap and robust construction. For the fast prediction of induction motor steady-state performance without the need for time-consuming finite-element analyses, the equivalent circuit parameters of the machine need to be calculated, including rotor slot leakage inductances. This paper, in particular, proposes a new improved analytical formula to determine the rotor slot leakage inductance in squirrel-cage induction motors with rectangular-shaped bars. The formula is obtained by solving Poisson's equation in the slot domain. Results are assessed by comparison against Finite Element Analysis (FEA). The precision of the presented methodology is also compared to that of approximated analytical models available from the literature. The comparison shows that the accurate formula proposed is in excellent agreement with FEA with errors below 2%, while the simplified model generally leads to errors above 10% which increase as the height-to-width bar ratio decreases.
- Published
- 2015