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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
Acquisition Source
Marshall Space Flight Center
Document Type
Other - Patent
External Source(s)
MFS-31143-1
Authors
David E Howard (Marshall Space Flight Center Redstone Arsenal, United States)
Dennis A Smith (Marshall Space Flight Center Redstone Arsenal, United States)
Date Acquired
August 20, 2013
Publication Date
November 7, 2000
Publication Information
Publisher: United States Patent and Trademark Office
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: NASA-Case-MFS-31143-1
Patent Number: US-Patent-6,144,198
Patent Application Number: US-Patent-Appl-SN-128634
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-6,144,198
Patent Application
US-Patent-Appl-SN-128634

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