Thermomechanical Rotor Fatigue of an Interior Permanent Magnet Synchronous Motor

Thermomechanical Rotor Fatigue of an Interior Permanent Magnet Synchronous Motor

Interior permanent magnet synchronous motors (IPMSMs) are extensively used as traction motors today because of their exceptional torque, power density, and wide, constant power operating range. Under real-world usage, an IPMSM rotor undergoes varying electromagnetic, thermal, and mechanical loads. U...

Full description

Saved in:
Bibliographic Details
Published in:Machines (Basel) Vol. 12; no. 3; p. 158
Main Authors: Sahu, Ashish Kumar, Haddad, Reemon Z., Al-Ani, Dhafar, Bilgin, Berker
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-03-2024
Subjects:
Adhesives
Analysis
Boundary conditions
Design criteria
drive cycle
drive cycle compression
Electromagnetism
Fatigue
Fatigue life
Fatigue testing machines
Load
Magnets, Permanent
Materials
Mechanical properties
Metal fatigue
Permanent magnets
rotor structural integrity
Rotors
S N diagrams
Simulation
Simulation methods
Stress analysis
stress-life fatigue
Structural integrity
Synchronous motors
Temperature
thermomechanical fatigue
Workflow
Yield stress
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Interior permanent magnet synchronous motors (IPMSMs) are extensively used as traction motors today because of their exceptional torque, power density, and wide, constant power operating range. Under real-world usage, an IPMSM rotor undergoes varying electromagnetic, thermal, and mechanical loads. Under such conditions, fatigue life-based design criteria should be used over stress-based design criteria to ensure the structural integrity of the rotor. Moreover, the driving dynamics can change the rotor temperature continuously, which affects the electromagnetic, mechanical, and fatigue properties of the rotor material. This paper proposes a robust thermomechanical rotor fatigue simulation workflow considering significant loads acting on an IPMSM rotor and the temperature variation throughout a drive cycle. It discusses an accelerated fatigue life estimation approach based on the peak valley extraction method to reduce the simulation time significantly for the stress and fatigue analysis. Then, it presents a method for a stress-life curve generation for variable loading. It also presents a sensitivity study with a median S-N curve, and a 90% reliability and 95% confidence (R90C95) S-N curve.
ISSN:2075-1702
2075-1702
DOI:10.3390/machines12030158