Setup and Implementation of a Simplified Thermal Model for Servomotor

Abstract

Permanent-magnet AC (PMAC) servomotor is finding expanded use in high-performance applications. Because servomotor is always required to instantaneously provide 3 times rated torque, how to protect it from overheating is a very important issue. In this paper, a simplified thermal model is presented and its implementation is described. The application on a 400 W servomotor shows a good agreement between test and estimation