基于脉宽调制功率放大器的伺服驱动设计

针对目前伺服控制器中驱动功能简单、保护措施少、效率低等问题,采用了新型脉宽调制功率放大器和相关逻辑电路相结合的设计方法,设计了一种具有电流闭环和速度闭环功能的直流电机驱动器。设计的伺服驱动器输出电流范围广、模块化程度高,适用于多种伺服电机。文章给出了工程应用中各器件的参数计算方法以及电流环和速度环参数整定调试步骤。通过在实际应用测试表明文章设计的伺服驱动器速度精度高、使用可靠,具有较高的工程实用性。

For the problems of simple driving function,less protection measures and low efficiency in the current servo controller,a new PWM power amplifier andrelated logic circuits are used to design a DC motor driver with the function of current closed-loop and speed closed-loop.The designed servo driver has a wide range of output current and a high degree of modularity,which is suitable for a variety of servo motors.In this paper,the parameter calculation method of each device in engineering application and the adjustment and debugging steps of current loop and speed loop parameters are given.The practical application test shows that the servo driver designed in this paper has high speed accuracy,reliable use and high engineering practicability.