Shaft Position Sensing at High Speeds
- 1 July 1969
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industrial Electronics and Control Instrumentation
- Vol. IECI-16 (1) , 74-80
- https://doi.org/10.1109/tieci.1969.230147
Abstract
An alternative method for determining the angular position of a rotating shaft is introduced. The required information is obtained from the envelopes of a modulated carrier at the stator terminals of an ac servomechanism. Essentially, a single-phase constant amplitude carrier signal is applied to the rotor winding; with zero stator current, the amplitude of the transformed carrier at any stator winding depends on the cosine of the angle between the rotor and stator windings, provided the ratio of rotor speed to carrier frequency is small. The stator envelopes may be decoded by analog methods to give a single analog signal calibrated to indicate the shaft position within a 360° range. An example of the application of this method to static drives for ac machines is included.Keywords
This publication has 2 references indexed in Scilit:
- AC Motor Supply with Thyristor ConvertersIEEE Transactions on Industry and General Applications, 1966
- D-C machine with solid-state commutationElectrical Engineering, 1962