Deep Learning-based Prediction of Key Performance Indicators for Electrical Machine

TL;DR

This paper introduces a deep learning meta-model to rapidly predict key performance indicators of electrical machines, significantly reducing computational costs and enabling faster multi-objective optimization.

Contribution

It demonstrates the effectiveness of image-based deep learning models for KPI prediction, offering a general geometry representation comparable to classical scalar parametrization.

Findings

High prediction accuracy achieved with deep learning models

Image-based approach can match classical scalar parametrization in quality

Significant reduction in optimization time and computational resources

Abstract

The design of an electrical machine can be quantified and evaluated by Key Performance Indicators (KPIs) such as maximum torque, critical field strength, costs of active parts, sound power, etc. Generally, cross-domain tool-chains are used to optimize all the KPIs from different domains (multi-objective optimization) by varying the given input parameters in the largest possible design space. This optimization process involves magneto-static finite element simulation to obtain these decisive KPIs. It makes the whole process a vehemently time-consuming computational task that counts on the availability of resources with the involvement of high computational cost. In this paper, a data-aided, deep learning-based meta-model is employed to predict the KPIs of an electrical machine quickly and with high accuracy to accelerate the full optimization process and reduce its computational costs. The focus is on analyzing various forms of input data that serve as a geometry representation of the machine. Namely, these are the cross-section image of the electrical machine that allows a very general description of the geometry relating to different topologies and the classical way with scalar parametrization of geometry. The impact of the resolution of the image is studied in detail. The results show a high prediction accuracy and proof that the validity of a deep learning-based meta-model to minimize the optimization time. The results also indicate that the prediction quality of an image-based approach can be made comparable to the classical way based on scalar parameters.