Novel Topology Optimization Method for Weight Reduction in Electrical Machines

This paper proposes a combined electromagnetic and mechanical topology optimization for weight reduction in electrical machines based on Finite Element Analysis (FEA) Evolutionary Structural Optimization (ESO). The devised method is an on-off-type algorithm with adaptative mesh which low flux density Von Mises stress cells are removed successively from first machine design. With this approach, the of can be considerably reduced without compromising performance machine, computation time compared to other methods. A case study involving 1.2 MW low-speed, permanent magnet motor analyzed under different conditions (algorithm parameters, initial mesh, rotational speed) used compare proposed two approaches.