# Shape Optimization of Rotating Electric Machines using Isogeometric Analysis and Harmonic Stator-Rotor Coupling

## TL;DR

This paper presents a shape optimization method for rotating electric machines utilizing isogeometric analysis and harmonic coupling, enabling efficient geometry modifications and improved electromagnetic performance.

## Contribution

It introduces a novel multipatch isogeometric modeling approach with harmonic stator-rotor coupling for optimized electric machine design.

## Key findings

- Reduced harmonic distortion in electromotive force
- Efficient geometry modification without remeshing
- Validated approach on a 6-pole permanent magnet machine

## Abstract

This work deals with shape optimization of electric machines using isogeometric analysis. Isogeometric analysis is particularly well suited for shape optimization as it allows to easily modify the geometry without remeshing the domain. A 6-pole permanent magnet synchronous machine is modeled using a multipatch isogeometric approach and rotation of the machine is realized by modeling the stator and rotor domain separately and coupling them at the interface using harmonic basis functions. Shape optimization is applied to the model minimizing the total harmonic distortion of the electromotive force as a goal functional.