Drive Control and Feedback Devices (Motors And Drives)

In this section, open- and closed-loop control will be reviewed. Most of the information has been previously presented. However, the focus of this topic will be on the external devices that connect to the drive. These external components allow the drive to interface to a system and provide the necessary speed and torque control to maximize efficiency.
External devices (peripherals) are a vital part of any drive system— whether operating as part of a remote operator station or part of an entire production system. There is such a wide variety of peripherals that are used in drive control that to include all possible combinations would be beyond the scope of this topic. However, the major categories of devices and their use will be covered in this topic.