Methodology for cage shape optimization of a permanent magnet synchronous motor under line start conditions

The paper proposes a methodology for shape optimisation of the starting cage of an LSPMSM motor with the aim to improve its synchronisation performance. The parameters of the machine are established from a field-circuit model where the magnetic field is simulated using a finite element approach. To facilitate the use of commercial software bespoke procedures have been developed and model parameterization applied with the aid of the scripting language Visual Basic. A particle swarm algorithm has been adapted for design optimization purposes. The proposed strategy has been verified via test simulations