关键词：伺服电机；负载/电机惯量比；温度上升率;优化匹配；电机控制
摘 要：Based on the load torque ratio,load/rated speed ratio,the temperature rise ratio and load/motor inertia ratio of servo motor's optimization matching principle,servo motor selection mathematical model of transmission system in CNC machine tool is built,compared to traditional selection algorithm,which is using the actual duty cycle conditions to optimal matching and analyzing.Then motor models available to meet the maximum utilization of the servo system,achieve the purpose of improving motor performance and reduce costs.In this paper,by taking servo motor selection of three-axis transmission system in a CNC machine tools for example,horizontal,inclined and vertical transmission system's parameters selection and calculation are analyzed in detail.With the engineering test and motor control software,measure data is achieved,the reasonableness of the method in the paper is proved.