High Performance Rare-Earth Free Interior Permanent Magnet Motor Enabled by Carbon Fiber Sleeve and Iron Nitride Magnets

Document Type

Conference Proceeding

Publication Date

2025

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Source Publication

2025 IEEE International Electric Machines & Drives Conference (IEMDC)

Source ISSN

979-8-3503-7658-6

Original Item ID

DOI: 10.1109/IEMDC60492.2025.11061088

Abstract

Interior Permanent Magnet (IPM) motors equipped with rare-earth permanent magnets (PMs) are the primary option in Electric Vehicles (EV). Despite the superiority of electromagnetic performance for these motors and resistance against demagnetization, price fluctuations and unsustainable supply are posing challenges to continue producing EV motors with that type of PM. Iron Nitride (FeN) PM, rare-earth free, developed by Niron Magnetics can be an alternative option especially when design issues are tackled. This paper presents FeN+Ferrite IPM motor with Carbon Fiber sleeve to enable the use of thick rare-earth free PMs without penalizing the motor performance as in conventional retention methods relying on bridges and center-posts.

Comments

Published as part of the proceedings of the 2025 IEEE International Electric Machines & Drives Conference (IEMDC). DOI.

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