伺服驱动电流调节器的设计

Design of Current Controller in Servo Drive

介绍了伺服驱动中电流调节器的设计方法。在硬件上给出LTS25-NP,ACS7xx,HCPL-7840 3种电流采样器件的工作原理、性能指标和DSP的接口设计,可知3种器件可以满足不同的电流采样精度与速度的要求。在软件上,利用仿真得到电流调节器PI参数计算方法,并介绍实验整定方法。仿真结果表明,通过电机的参数可以计算得到PI电流调节器良好的初始参数,为实验整定做基础。

This paper presented a design method of current controller in servo drive. On hardware design, three current sensors, LTS25-NP, ACSTxx, HCPL-7840 and their interface circuit with DSP＇s AD input were introduced, and these three current sensors can perform well to meet the demands of accuracy and speed in current sampling circuit. On software design, according to simulation, the principles of adjusting PI controller parameters were discussed. The results of the simulations show that good initial PI parameters can be calculated through the motor parameters, thus lay the foundation for experiment tuning.