In this study different methods of estimating the additional ac winding loss due to eddy currents at open-circuit are explored. A comparative study of 2D and 3D FEA, and hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux permanent magnet (AFPM)machine case studies are included, namely a machine with open slots and a coreless configuration. These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to be considered during optimal design. This study is one of the first ones to compare meticulous 3D FEA models with more approximate, but faster solution methods which can be employed in the optimization process. The study is comprehensive and includes other discussions relevant to the subject matter, including the selection of the number of turns, the effect of the conductor cross section shape, the placement of each turn for the two machines under study, and the meshing of the turns for FEA based methods. Furthermore, the paper also proposes a measurement method for additional open-circuit winding losses.
|Title of host publication||2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019|
|Number of pages||7|
|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
|Name||2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019|
|Conference||11th IEEE International Electric Machines and Drives Conference, IEMDC 2019|
|Period||5/12/19 → 5/15/19|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT The support of Regal Beloit Corporation, University of Kentucky, the L. Stanley Pigman endowment and the SPARK program, and ANSYS Inc. is gratefully acknowledged.
© 2019 IEEE.
- Axial flux
- Eddy currents
- Open circuit winding losses
- PM machines
- Proximity effect
- Skin effect
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
- Mechanical Engineering