伺服电机选型及负载转矩计算(国外英文资料).docVIP

伺服电机选型及负载转矩计算(国外英文资料) Selection and calculation of servo motor load torque Inertia torque calculation Machinery manufacturers in the purchase of motor when the cutting force is not enough to worry about, often choose the motor of large size, which will not only increase the manufacturing cost of the machine tool, and the volume increases, the structure is not compact layout. This paper illustrates the application method of how to choose the best specifications of the motor, to control the manufacturing cost. A servo motor, drive selection 1. in principle should be to choose the servo motor according to the load conditions. All the load on the motor shaft has two kinds, namely damping torque and inertia load. These two kinds of load are calculated correctly, the value shall meet the following conditions: 1) when the machine for no-load running, in the whole speed range, and the servo motor shaft of the motor load torque in continuous rated torque range, which should work in continuous torque speed characteristic curve. 2) the maximum load torque, load and overload cycle time in the curve within the scope permitted. 3) torque in acceleration / deceleration during acceleration and deceleration motor should be in the area (or working area). 4) requirements for frequent starting, braking and load changes periodically, it must be checked in a cycle of the RMS torque. Continuous rated torque and the motor should be less than. 5) sensitivity and on the motor shaft load inertia of the motor and the servo system will affect the accuracy of. Usually, when the load is smaller than that of the motor rotor inertia, the little effect. But when the load inertia reached even more than 5 times the rotor inertia, the sensitivity and response time greatly affected. Even the servo amplifier can not be in the normal range of work. So for this kind of inertia should be avoided. The recommendation is as follows: the relationship between servo motor inertia and load inertia Jl Jm: Jl5 * Jm