Digital-computer program for design synthesis of large squirrel-cage induction motors

An appraisal is made of the general problem of system-design synthesis by digital computers. Published literature on the design of electrical machines by computer is surveyed, and it is concluded that the majority of this work may be categorised as design analysis and partial design synthesis. The development of a pilot program for the design synthesis of large squirrel-cage induction motors is described, with emphasis on the methods adopted in the search for solutions. Particular attention is given to the development of special techniques dealing with the major discrete parameters, e.g. frame size and numbers of slots and conductors per slot. The final program comprises a marriage of methods of solution, including iterative techniques and preknowledge of the system functions, which was considered essential to achieve an economical convergence scheme. Results are presented, illustrating that the program produced satisfactory convergence to meet required performance specifications. A number of alternative solutions are obtained for each case of input data. There is considerable scope for the improvement and refinement of the program.