Design, Performance and Application of the Vernier Resolver*
G. Kronacher · Bell System Technical Journal · 1957
The Vernier Resolver is a precision angle transducer which, from the stand-point of performance, resembles a geared up synchro resolver, except that the step-up ratio between the mechanical angle and the electrical signal is obtained electrically. Vernier resolvers with step up ratios of 26, 27, 32 and 33 have been designed and built. The unit is a reluctance type, variable coupling transformer. By placing all windings on the stator, sliding contacts are eliminated. Both the stator and the rotor are laminated. Because of the averaging effect inherent in a laminated construction, the accuracy of the unit exceeds by many times the machining accuracy. The performance of present experimental units is characterized by a repeatability of better than ±3 seconds of shaft angle, and a standard deviation error over one full revolution of less than 10 seconds of arc.