Development of an Instantaneous Electromagnetic Torque Measuring System

The following paper describes a technique for measuring torques developed by various transducers. The technique was used to measure the instantaneous electromagnetic torque of a two-phase servomotor, and some test data are included. This measuring technique was developed for the purpose of obtaining test data to correlate with the analysis portion of the author´s Ph.D. thesis on Phase Plane Solution for Systems Using Nonlinear Two-Phase Servomotor. The measuring technique performed satisfactorily in its prototype form and was further used to determine the characteristics of the 120-c/s alternating torque in relation to average torque for a 60-cycle two-phase servomotor. The principle of operation, test stand, arrangement circuitry, calibration procedure, test data, and a discussion of the performance of the instrument are presented.