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.