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Circuit Regulates Speed Of dc MotorDriving circuit regulates speed of small dc permanent-magnet motor in tape recorder. Two nested feedback loops maintain speed within 1 percent of constant value. Inner loop provides coarse regulation, while outer loop removes most of variation in speed that remains in the presence of regulation by the inner loop. Compares speed of motor with commanded speed and adjusts current supplied to motor accordingly.
Document ID
19900000318
Document Type
Other - NASA Tech Brief
Authors
Weaver, Charles (SRI International Corp.)
Padden, Robin (SRI International Corp.)
Brown, Floyd A., Jr. (SRI International Corp.)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 7
ISSN: 0145-319X
Subject Category
ELECTRONIC COMPONENTS AND CIRCUITS
Report/Patent Number
MSC-21345
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.