Abstract
This paper presents the theoretical and experimental analysis of step response of pulse-motor. At first, by introducing the “equivalent torque time constant”, the fundamental differential equation of step response is obtained. Solutions of this equation are Bessel function, whose order is pure imaginary number, and Lommel function. Since the Bessel function of imaginary order has seldom or never been discussed in the existing literatures, the author establishes a form of solutions convenient to the numerical calculation. Next, by using a small size synchro control transformer, a simple method of measuring the step response of pulse-motor is presented. If the value of “equivalent torque time constant” is decided by comparing theoretical data with measured ones, the solutions described in this paper coincide with the experimental results fairly well.
