Proposed tachometer produces voltages proportional to shaft angular velocity and (by differentiation) acceleration. Coil moving in homopolar field generates emf proportional to shaft angular velocity.
Brushless Low-Speed dc Tachometer
NASA Tech Briefs ; 8 , 2
1984-11-01
Miscellaneous
No indication
English
Brushless tachometer gives speed and direction
NTRS | 1977
|Brushless Direct Current Tachometer Patent Application
NTIS | 1969
|Tachometer Derived From Brushless Shaft-Angle Resolver
Online Contents | 1995
Tachometer Derived From Brushless Shaft-Angle Resolver
NTRS | 1995
|NTIS | 1971
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