Equivalent Circuits with Transformer Elements for Eddy Current Rotor Induction Motors Derived from Field Equations I-Sleeve Rotor Motors

Radial flux density and axial and tangential currents in sleeve rotors of polyphase induction motors are analyzed from Maxwell´s equations. For particular solutions of field equations, transformer equivalents with constant inductance elements are introduced. Motor characteristics are described by an equivalent circuit of up to four transformers in series. A novel type of leakage inductance is introduced. Analysis of motor characteristics from design specifications is simple.