Title :
Steady and transient states thermal analysis of a 7.5-kW squirrel-cage induction machine at rated-load operation
Author :
Okoro, Ogbonnaya I.
Author_Institution :
Dept. of Electr. Eng., Univ. of Nigeria, Nsukka, Nigeria
Abstract :
The lumped-parameter thermal model is used to predict both the steady-state and transient solution to the temperatures within a 7.5-kW induction machine. The system of nonlinear ordinary differential equations and algebraic equations which describe the thermal behaviour of the machine in transient and steady states, respectively, were solved numerically using the Fourth-order Runge-Kutta method and the Gauss-Siedel method, respectively. The model performance is validated by experimental measurements on the test machine at rated load operation. The results show that there is a good agreement between the measured and predicted steady and transient states temperatures at rated load condition.
Keywords :
Runge-Kutta methods; algebra; iterative methods; lumped parameter networks; machine testing; nonlinear differential equations; squirrel cage motors; transient analysis; 7.5 kW; Gauss-Siedel method; algebraic equations; fourth-order Runge-Kutta method; lumped-parameter thermal model; nonlinear ordinary differential equations; rated-load operation; squirrel-cage induction machine; steady-state temperature; test machines; thermal analysis; transient states temperature; Differential algebraic equations; Differential equations; Gaussian processes; Induction machines; Nonlinear equations; Predictive models; Steady-state; Temperature; Testing; Transient analysis; Finite-element analysis (FEA); lumped parameter; squirrel-cage machine; temperature rise; thermal model;
Journal_Title :
Energy Conversion, IEEE Transactions on
DOI :
10.1109/TEC.2005.852965
