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Ironless-armature brushless motorDevice uses 12-pole samarium cobalt permanent-magnet rotor and three Hall-effect sensors for commutation. In prototype motor, torque constant (3-phase delta) is 65 oz-in/amp; electrical time constant (L/R) is 0.2 x 0.001 sec, and armature resistance is 20 ohms.
Document ID
19760000476
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Fisher, R. L.
(Sperry Rand Corp.)
Date Acquired
August 8, 2013
Publication Date
March 1, 1977
Publication Information
Publication: NASA Tech Briefs
Volume: 1
Issue: 4
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
GSC-11880
Accession Number
76B10476
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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