Abstract
The emergence of carbon nanotube-copper composite conductors has opened a new degree of freedom in the electric machine design to improve the machine's performance: the conductivity of the winding. The goal of the present study is: 1) to determine how much improvement in power per unit volume and performance can be achieved with the increase in winding conductivity; and 2) to investigate any physical limitations on the effectiveness of this degree of freedom in improving the power per unit volume and performance of electric traction motors. Conventional electric motor topologies affected by ferromagnetic saturation as well as slotless topology that is not affected by saturation are analyzed. It was found that the ferromagnetic saturation of the lamination materials reduces the effectiveness of highly conductive winding in improving the power per unit volume. For machine topologies that are not affected by ferromagnetic saturation, the power density improvement reaches the theoretical expectation. In both cases, highly conductive winding improves the efficiency map by enlarging high efficiency operating area into light load as well as high speed operations.
| Original language | English |
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| Title of host publication | 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 2107-2114 |
| Number of pages | 8 |
| ISBN (Electronic) | 9781538693490 |
| DOIs | |
| State | Published - May 2019 |
| Event | 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States Duration: May 12 2019 → May 15 2019 |
Publication series
| Name | 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 |
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Conference
| Conference | 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 |
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| Country/Territory | United States |
| City | San Diego |
| Period | 05/12/19 → 05/15/19 |
Funding
This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). Corresponding author: Tsarafidy Raminosoa ([email protected]). ACKNOWLEDGMENT This material is based upon work supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office under contract number DE-AC05-00OR22725. A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. The authors thank Ilia N. Ivanov for his contributions to the Cu-CNT process development, as well as the U.S. Department of Energy’s Susan Rogers, and Oak Ridge National Laboratory’s Burak Ozpineci for their financial and managerial support.
Keywords
- Carbon nanotube conductors
- Cnt-cu composite
- Electric vehicle
- Non-heavy rare earth motors
- Traction
