Abstract
This paper proposes a new hybrid analytical and numerical FE-based method for calculating ac eddy current losses in wire windings and demonstrates its applicability for axial flux electric machines. The method takes into account 3D field effects in order to achieve accurate results and yet greatly reduce computational efforts. It is also shown that hybrid methods based on 2D FE models, which require semi-empirical correction factors, may over-estimate the eddy current losses. The new 3D FE-based method is advantageous as it employs minimum simplifications and considers the end turns in the eddy current path, the magnetic flux density variation along the effective length of coils, and the field fringing and leakage, which ultimately increases the accuracy of simulations. Case studies of axial flux PM motors: one with concentrated windings and open slots and another one with a coreless topology, are included.
Original language | English |
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Title of host publication | 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 |
Pages | 4867-4872 |
Number of pages | 6 |
ISBN (Electronic) | 9781728103952 |
DOIs | |
State | Published - Sep 2019 |
Event | 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States Duration: Sep 29 2019 → Oct 3 2019 |
Publication series
Name | 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 |
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Conference
Conference | 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 |
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Country/Territory | United States |
City | Baltimore |
Period | 9/29/19 → 10/3/19 |
Bibliographical note
Funding Information:ACKNOWLEDGMENT The support of National Science Foundation NSF Grant #1809876, of University of Kentucky, the L. Stanley Pigman endowment, and of ANSYS Inc. is gratefully acknowledged.
Publisher Copyright:
© 2019 IEEE.
Keywords
- 3D model
- Ac winding loss
- Axial flux motor
- Eddy current loss
- Finite element
- PM machine
ASJC Scopus subject areas
- Mechanical Engineering
- Control and Optimization
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering