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Torque Production in a Halbach Machine (en Inglés)
Nasa Technical Reports Server (Ntrs)
(Autor)
·
Dennis J. Eichenberg
(Autor)
·
Bibliogov
· Tapa Blanda
Torque Production in a Halbach Machine (en Inglés) - Nasa Technical Reports Server (Ntrs) ; Et Al ; Eichenberg, Dennis J.
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Reseña del libro "Torque Production in a Halbach Machine (en Inglés)"
The NASA John H. Glenn Research Center initiated the investigation of torque production in a Halbach machine for the Levitated Ducted Fan (LDF) Project to obtain empirical data in determining the feasibility of using a Halbach motor for the project. LDF is a breakthrough technology for "Electric Flight" with the development of a clean, quiet, electric propulsor system. Benefits include zero emissions, decreased dependence on fossil fuels, increased efficiency, increased reliability, reduced maintenance, and decreased operating noise levels. A commercial permanent magnet brushless motor rotor was tested with a custom stator. An innovative rotor utilizing a Halbach array was designed and developed to fit directly into the same stator. The magnets are oriented at 90deg to the adjacent magnet, which cancels the magnetic field on the inside of the rotor and strengthens the field on the outside of the rotor. A direct comparison of the commercial rotor and the Halbach rotor was made. In addition, various test models were designed and developed to validate the basic principles described, and the theoretical work that was performed. The report concludes that a Halbach array based motor can provide significant improvements in electric motor performance and reliability.
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