D06.8 - Experimental Results for an Inverter Integrated with a High-Speed Surface Permanent Magnet External Rotor Motor

Thursday, March 26, 2026

12:00 PM - 1:45 PM CT

Location: Poster 6

Technical Dialogue Presenter(s)

VR

Vandana Rallabandi

Oak Ridge National Laboratory

Co-Author(s)

Shajjad Chowdhury, PhD (he/him/his)

Oak Ridge National Lab
PR

Pedro Ribeiro

Oak Ridge National Laboratory
Burak Ozpineci, PhD

Oak Ridge National Laboratory
CH

Clayton Hickey

Oak Ridge National Laboratory
JW

Jon Wilkins

Oak Ridge National Laboratory
BK

Bidzina Kekelia

National Laboratory of the Rockies
EC

Emily Cousineau

National Renewable Energy Laboratory
RC

Rajneesh Chaudhary

National Renewable Energy Laboratory
SN

Sreekant Narumanchi

National Renewable Energy Laboratory

This work presents on the prototyping, and testing of a high speed outer rotor surface permanent motor. The motor uses non-heavy rare earth permanent magnets and operates at a rated speed of 6000rpm. In-slot ceramic heat exchangers are utilized for the cooling of the windings. The external rotor configuration of the motor leaves a significant amount of space in the stator bore, which is leveraged for the integration of the power electronics. This leads to a number of challenges which are discussed in this paper. Simulation and experimental results are presented.