Manufacturability Oriented Topology Optimization Framework for Electrical Machines Using NGnet

Manufacturability Oriented Topology Optimization Framework for Electrical Machines Using NGnet

Článek WoS

Topology optimization often produces unfeasible geometries, making manufacturing challenging. This paper addresses this limitation through the development of a methodology that utilizes a normalized Gaussian network (NGnet) with Gaussian functions of variable sizes unevenly distributed within an optimized space. The overlap of the Gaussian functions is analyzed for its impact on the final geometry. In addition, several modifications are applied to the NGnet output to achieve feasible geometries. Triangular elements are used to smooth the final geometry, enhancing its manufacturability. The matrix representation is used as a computational encoding for topology search and constraint checking, while the output is intended to be transferable to standard CAD and conventional manufacturing routes (laminated electrical steel).The main contribution is the integration of manufacturability constraints and geometry-repair operations before FEA evaluation, which reduces the number of infeasible candidates explored by the optimizer. The approach is demonstrated on a line-start synchronous reluctance machine rotor case study and can be extended to other electrical machine rotor topologies requiring multi-material feasibility constraints.

Topology optimization often produces unfeasible geometries, making manufacturing challenging. This paper addresses this limitation through the development of a methodology that utilizes a normalized Gaussian network (NGnet) with Gaussian functions of variable sizes unevenly distributed within an optimized space. The overlap of the Gaussian functions is analyzed for its impact on the final geometry. In addition, several modifications are applied to the NGnet output to achieve feasible geometries. Triangular elements are used to smooth the final geometry, enhancing its manufacturability. The matrix representation is used as a computational encoding for topology search and constraint checking, while the output is intended to be transferable to standard CAD and conventional manufacturing routes (laminated electrical steel).The main contribution is the integration of manufacturability constraints and geometry-repair operations before FEA evaluation, which reduces the number of infeasible candidates explored by the optimizer. The approach is demonstrated on a line-start synchronous reluctance machine rotor case study and can be extended to other electrical machine rotor topologies requiring multi-material feasibility constraints.

AC motors | evaluation process | line-start synchronous reluctance motor | manufacturability | normalized Gaussian function optimization | topology optimization

AC motors | evaluation process | line-start synchronous reluctance motor | manufacturability | normalized Gaussian function optimization | topology optimization

LOLOVÁ, I.; BRAMERDORFER, G.; BÁRTA, J.

30.04.2026

Institute of Electrical and Electronics Engineers Inc.

IEEE Transactions on Energy Conversion

41

3

Nizozemsko

2269

2278

11

https://ieeexplore.ieee.org/document/11501761