In traditional electric machines, it is usually possible to achieve constant power high-speed operation by employing field weakening through the injection of a negative d-axis current component. However, in machines with low armature inductance, such as high power density permanent magnet synchronous machines, and more specifically, coreless machines, which are gaining increasing attention because of their high specific torque, the extended speed range obtained using this method is very narrow. This paper summarizes the performance characteristics of existing approaches for obtaining constant power operation and proposes two new techniques, specially applicable to coreless axial flux permanent magnet machine namely, current weakening and relative winding rotation.
|Title of host publication||2018 IEEE Transportation and Electrification Conference and Expo, ITEC 2018|
|Number of pages||6|
|State||Published - Aug 28 2018|
|Event||2018 IEEE Transportation and Electrification Conference and Expo, ITEC 2018 - Long Beach, United States|
Duration: Jun 13 2018 → Jun 15 2018
|Name||2018 IEEE Transportation and Electrification Conference and Expo, ITEC 2018|
|Conference||2018 IEEE Transportation and Electrification Conference and Expo, ITEC 2018|
|Period||6/13/18 → 6/15/18|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT The authors are thankful to Greg Heins and Chris Heintz for their suggestions and technical contributions. The support of the NASA Kentucky Space Grant Consortium, University of Kentucky, the L. Stanley Pigman endowment, and ANSYS, Inc. is gratefully acknowledged.
© 2018 IEEE.
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering