Analysis of Superconducting Synchronous Motors With Halbach Array Field Excitation
- 30 November 2020
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 31 (2), 1-5
- https://doi.org/10.1109/tasc.2020.3041314
Abstract
This paper evaluates the novel design approach of a 3 MW partially superconducting synchronous machine for electric aircraft propulsion. Its special feature is the application of an electromagnetic Halbach array for the field excitation to reduce the back yoke weight and thereby increase overall output power density. The electromagnetic Halbach array is obtained by reproducing a permanent magnet Halbach array with high-temperature superconducting coils. The arrangement is further optimized, and its field characteristics are compared to a conventional superconducting field winding design. Even though the Halbach array has a higher space and superconductor consumption, it shows better characteristics concerning the intensity of inside and outside magnetic field. Applied in a superconducting motor, the Halbach array field winding achieves a back yoke thickness reduction of up to 85% and a back yoke weight reduction of up to 78% compared to reference models. The gravimetric power density is increased by up to 30% at the expense of volumetric power density. In exchange for a back yoke weight reduction, other components, such as field winding and cryostat, become heavier.Keywords
Funding Information
- Baden-Wuerttemberg Scholarship (Ohsaki Laboratory of the University of Tokyo)
This publication has 15 references indexed in Scilit:
- Electromagnetic Design of Superconducting Synchronous Motors for Electric Aircraft PropulsionIEEE Transactions on Applied Superconductivity, 2018
- Optimization of a MW Halbach PMSG for wind turbine applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2016
- Actively Shielded, High Field Air-core Superconducting MachinesIEEE Transactions on Applied Superconductivity, 2016
- Design of a Superconducting Magnet for Lorentz Force Electrical Impedance TomographyIEEE Transactions on Applied Superconductivity, 2015
- Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductorsSuperconductor Science and Technology, 2014
- Test Specimen Shape Considerations for the Measurement of Rotational Core LossesIEEE Transactions on Energy Conversion, 2011
- Rotating AC MachinesPublished by Wiley ,2011
- Next Generation More-Electric Aircraft: A Potential Application for HTS SuperconductorsIEEE Transactions on Applied Superconductivity, 2009
- The Energy and Environmental Benefits of Superconducting Power ProductsMitigation and Adaptation Strategies for Global Change, 2005
- Design of permanent multipole magnets with oriented rare earth cobalt materialNuclear Instruments and Methods, 1980