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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Advanced Soft Magnets and Magnetocaloric Materials: An FMD Symposium in Honor of Victorino Franco
Presentation Title Metal Amorphous Nanocomposite (MANC) Materials for High High Speed Axial Motors
Author(s) Michael E. McHenry, K. Schneider, Satoru Simizu, James Egbu, M. P. DeBoer, Eric Theisen
On-Site Speaker (Planned) Michael E. McHenry
Abstract Scope Metal amorphous nanocomposites (MANC) are soft magnetic materials (SMMs) studied for magnetic tape wound core (TWC) components in high-speed motor (HSM) applications. MANCs consist of soft magnetic nanocrystals embedded in a continuous, resistive amorphous matrix, providing low eddy current losses. TWC performance arising from low core loss enables magnetic switching at 1- 100 kHz; (Fe70Ni30)85Nb0.5B14.5Si0 (Bs = 1.5 T) and (Fe70Ni30)80Nb4B14Si2 MANCs (W1T,400Hz = 0.5 W/Kg, Hc = 2.4 A/m, ýr > 35000). Co additions increase inductions and Curie temperatures and reduce magnetostriction to ~1 ppm. Axial HSMs require TWCs to have robust mechanical properties sufficient for: (1) core winding and strain annealing; (2) manufacturing rotor laminates and slots (3) stress tolerance at high rotational speeds. We summarize manufacturing issues for MANC rotors and stators using RE-lean materials as studied in USDOE AMO and VTO projects. Efforts include (1) production steps for TWCs; (2) MANC ribbon mechanical properties (strength, Weibull and Young’s Moduli); (3) epoxy wetting of MANCs for vacuum impregnation bonding; (4) vacuum impregnation epoxy bonding for rotor mechanical integrity, (5) failure mechanisms and figure of safety issues in MANC/epoxy laminates. These target paths to efficient HSMs for powers of ~34 kW for EV applications. Considerations of alloy component criticality will be reviewed. A future path for high temperature motors and active cooling will also be presented in light of these motor topologies.
Proceedings Inclusion? Planned:

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