The interaction between the eddy currents induced in the solid cylindrical rotor steel structure and the revolving field of the airgap produces the electrodynamic torque. The polyphase induction machine with solid-iron rotor offers advantages in ease of manufacture, in high torque per ampere at standstill, in withstanding high rotational stresses, and in operating in unusual environments. It is the purpose of this paper to present an approximate three-dimensional nonlinear numerical analysis of the solid-rotor induction motor for finding the three-dimensional current-density distribution in the solid rotor, in order to calculate the performance characteristics, based on finite-difference iterative techniques.


Author's manuscript; originally published in IEEE Transactions on Magnetics, Vol. MAG-18, No. 2, Nov. 1979.


eddy currents, solid rotor induction motors, current density distribution, airgap, electrodynamic torque, polyphase induction machines, three dimensional nonlinear numerical analysis, finite difference iterative techniques

Subject Categories

Numerical analysis, Finite differences


Electrical and Computer Engineering



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