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System and Method for Determining Rate of Rotation Using Brushless DC MotorA system and method are provided for measuring rate of rotation. A brushless DC motor is rotated and produces a back electromagnetic force (emf) on each winding thereof. Each winding's back-emf is squared. The squared outputs associated with each winding are combined, with the square root being taken of such combination, to produce a DC output proportional only to the rate of rotation of the motor's shaft.
Document ID
20010125616
Document Type
Other - Patent
Authors
Howard, David E. (NASA Marshall Space Flight Center Huntsville, AL United States)
Smith, Dennis A. (NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 20, 2013
Publication Date
November 7, 2000
Subject Category
Instrumentation and Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-Case-MFS-31143-1|US-Patent-6,144,198
Patent Application
US-Patent-Appl-SN-128634
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