NDLI: Flux Pump Excited Double-Helix Rotor for Use in Synchronous Machines

Content Provider	IEEE Xplore Digital Library
Author	Ishmael, S. Goodzeit, C. Masson, P. Meinke, R. Sullivan, R.
Copyright Year	2002
Abstract	High temperature superconducting (HTS) machines have been demonstrated to benefit applications requiring high power density and torque. However, power density of existing superconducting machinery is limited by achievable flux density in the air gap and could be significantly increased with larger rotor currents. We propose a rotor based on MgB₂ conductor running in persistent current mode. A novel MgB₂ HTS flux pump transformer enables currents of several thousand amps in the rotor in a persistent mode. Large cryogenic heat loads associated with current leads are diminished by using a flux pump transformer for rotor excitation. All coils in the rotor and flux pump transformer are based on the double-helix winding configuration, which offers unmatched rotor robustness and reliability. This winding configuration also facilitates large bending radii, leading to an outstanding stress management and thus improved current carrying capacity of stress sensitive HTS conductors. The research presented in this paper analyses the performance of such a system through the design of a synchronous rotor for motors, generators and synchronous condensers.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	693
Ending Page	696
Page Count	4
File Size	506256
File Format	PDF
ISSN	10518223
Volume Number	18
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pumps Synchronous machines High temperature superconductors Conductors Rotors Stress Torque Machinery Persistent currents Cryogenics synchronous motor Double helix flux pump transformer (DH-FPT) double-helix winding configuration generator and condenser HTS superconducting machinery
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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