Minimization of cogging torque in permanent magnet machines using the topological gradient and adjoint sensitivity in multi-objective design

2012 ◽  
Vol 39 (1-4) ◽  
pp. 933-940 ◽  
Author(s):  
Piotr Putek ◽  
Marian Slodička ◽  
Piotr Paplicki ◽  
Ryszard Pałka
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Machines ◽  
Adjoint Sensitivity ◽  
Cogging Torque ◽  
Multi Objective ◽  
Topological Gradient

scholarly journals A Design Method for the Cogging Torque Minimization of Permanent Magnet Machines with a Segmented Stator Core Based on ANN Surrogate Models

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1880
Author(s):  
Elia Brescia ◽  
Donatello Costantino ◽  
Paolo Roberto Massenio ◽  
Vito Giuseppe Monopoli ◽  
Francesco Cupertino ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Design Method ◽  
Heuristic Approach ◽  
Topological Optimization ◽  
Permanent Magnet Machines ◽  
Stator Core ◽  
Cogging Torque ◽  
Design Formula ◽  
Harmonic Components

Permanent magnet machines with segmented stator cores are affected by additional harmonic components of the cogging torque which cannot be minimized by conventional methods adopted for one-piece stator machines. In this study, a novel approach is proposed to minimize the cogging torque of such machines. This approach is based on the design of multiple independent shapes of the tooth tips through a topological optimization. Theoretical studies define a design formula that allows to choose the number of independent shapes to be designed, based on the number of stator core segments. Moreover, a computationally-efficient heuristic approach based on genetic algorithms and artificial neural network-based surrogate models solves the topological optimization and finds the optimal tooth tips shapes. Simulation studies with the finite element method validates the design formula and the effectiveness of the proposed method in suppressing the additional harmonic components. Moreover, a comparison with a conventional heuristic approach based on a genetic algorithm directly coupled to finite element analysis assesses the superiority of the proposed approach. Finally, a sensitivity analysis on assembling and manufacturing tolerances proves the robustness of the proposed design method.

Design Consideration to Reduce Cogging Torque in Axial Flux Permanent-Magnet Machines

2007 ◽  
Vol 43 (8) ◽  
pp. 3435-3440 ◽  
Author(s):  
Delvis Anibal Gonzalez ◽  
Juan Antonio Tapia ◽  
Alvaro Letelier Bettancourt
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Machines ◽  
Design Consideration ◽  
Axial Flux ◽  
Cogging Torque
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