Modified ATO algorithm based high accuracy RDC using pulse excitation

Abstract

Most important requirement in the modern control industry applications is the measurement of motor rotor shaft angle. Resolvers are absolute angular position measurement transducers, but it requires some signal processing techniques to improve the tracking accuracy of the angle. This paper discusses the mathematical design analysis of Resolver to Digital Converter (RDC) using modified Angle Tracking Observer (ATO) algorithm with pulse excitation. The proposed software based RDC system is implemented in MATLAB® SIMULINK® and the angle tracking performance is verified through various ranges of speed. The results show that the designed RDC system provides better tracking performance with negligible error and it reduces the hardware cost, weight and size.