Synthesis of squirrel cage motors: a key to optimization

A method of synthesis, which is a procedure to arrive at a motor of given specifications, is presented. In practice synthesis is followed by an optimization procedure. To illustrate the technique, a motor is synthesized with only one constraint, and more constraints are added, with the conclusion drawn that an optimization procedure is obvious when a synthesis procedure is well defined. It is shown that numerical information may be easily dispensed with and that fuzzy information is essential. The optimization problem is naturally unconstrained without resorting to complex transformation, penalty factors, or approximations by polynomials. It can be easily modified, according to specific needs, by anyone who has a reasonable knowledge of induction machine theory and some common sense; however, no previous experience in design is needed. As for optimization techniques, only the simplest and most obvious one, dichotomy, should be known. An important aspect of the method is that constraints are given in terms of equalities, not of inequalities