Design of high-precision synchros and resolvers

In the design of high-precision resolvers and synchros there are many sources of inaccuracies, such as harmonics generated by winding distributions, slot openings, and mechanical tolerances. This paper develops the equations for output voltage in terms of winding and air-gap factors, gives a method of analysis which is adaptable to digital techniques, and presents a general discussion of the sources of error and a means for minimizing these errors.