Abstract
There has been a global push for higher torque density and lower cost traction motors. The use of non-heavy rare-earth (non-HRE) permanent materials in traction motors are being investigated for the sustainability, profitability and affordability of electric vehicles and to broaden their adoption. A 20,000-rpm permanent magnet traction motor using non-HRE magnet materials is proposed. A dual three phase winding configuration driven by a segmented dual three phase drive is proposed to reduce the current ripple and as a result the DC Link capacitor, as well as to ease the voltage constraint at high speed and eliminate any risk of uncontrolled regeneration. Furthermore, the dual winding configuration enables a fault tolerant design which is useful for reliability. The paper presents comprehensive electromagnetic, thermal and mechanical designs and analyses using an integrated approach. The results have shown that the design is robust against demagnetization and confirmed its thermal and mechanical viability.
Original language | American English |
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Number of pages | 10 |
State | Published - 2020 |
Event | IEEE Energy Conversion Congress and Exposition (ECCE) - Duration: 11 Oct 2020 → 15 Oct 2020 |
Conference
Conference | IEEE Energy Conversion Congress and Exposition (ECCE) |
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Period | 11/10/20 → 15/10/20 |
Bibliographical note
See NREL/CP-5400-78713 for paper as published in proceedingsNREL Publication Number
- NREL/CP-5400-75994
Keywords
- electric machine
- energy efficiency
- thermal management
- vehicles