A Multiphysics Analysis and Investigation of Soft Magnetics Effect on IPMSM: Case Study Dynamometer

TL;DR

This paper investigates the impact of soft magnetic materials on the dynamic testing accuracy of IPMSMs with different rotor configurations using a multiphysics FEM analysis on an AC dynamometer.

Contribution

It introduces a multiphysics FEM approach to compare soft magnetic effects on different IPMSM rotor types in dynamometer testing, highlighting optimal magnetic materials.

Findings

Soft magnetic material choice significantly affects measurement accuracy.

V-type and Delta-type rotors respond differently to magnetic material variations.

The study identifies the most suitable soft magnetics for AC dynamometer applications.

Abstract

Nowadays, Interior Permanent Magnet Synchronous Motors (IPMSMs) are taken into attention in the industry owing to their advantages. Moreover, in many cases, performing static tests is not enough, and investigating electric machines under dynamic conditions is necessary. Accordingly, by employing a dynamometer system, the dynamic behavior of the electric machine under test is investigated. Among the dynamometers, the best is the Alternating (AC) dynamometer because the basic dynamometers cannot take loads with high complexity. So, in the following study, two IPMSM with V-type and Delta-type rotor configurations are designed and suggested to employ in AC dynamometer. Any non-ideality in the electric machines of AC dynamometers, electrically and mechanically, causes errors in the measurement of the motor under test. Electrically and mechanically, the behavior of a system significantly depends on the used soft magnetics besides its physical and magnetic configuration. Accordingly, by performing a Multiphysics analysis and using the FEM tool to change the soft magnetics in the rotor and stator core, comparing the electric motors' behavior in the AC dynamometer is investigated under the same operating conditions electrically and mechanically. Finally, which soft magnetics is more satisfactory for the AC dynamometer can be seen.