Performance calculation for a high speed solid-rotor induction motor

The paper deals with analytical method of design and prediction of performance characteristics for induction motors with solid steel rotor coated with copper layer. On the basis of the distribution of the 2D electromagnetic field, the equivalent impedance of the rotor have been derived. The edge effect and nonlinear magnetic permeability of solid steel have been included. The presented analytical method has been verified with laboratory test results. A 300 kW, 60 000-rpm, three-phase solid rotor induction motor for air compressor has been investigated. The accuracy of analytical approach is acceptable and can be recommended for rapid design of solid rotor induction motors.