Equivalent Circuits with Transformer Elements for Eddy Current Rotor Induction Motors Derived from Field Equations II-Drag Cup Rotor Motors

The characteristic problem in analysis of drag cup rotor motors by field theory is that field equations appear with different coefficients and co-ordinates in sleeve and web sections. By solving for both sections separately and synthesizing the complete field pattern, an equivalent circuit is derived in a manner similar to that for sleeve motors. Hence, performance characteristics can be computed readily. Examples of such calculations are given for both sleeve and drag cup rotor motors in Appendixes I through III, and test results are presented.