Development of A pulse-type servo drive system and the application on a 3-axises robot

Abstract

The principles and structure of a new economical pulse-type servo drive system were presented. One part is main control board for servo motor with incremental encoder, which receive pulse position command form upper controller. With the scholastic calculation in main control part of servo drive, and the dead time of PWM signals was compensated by hardware circuit, this drive system has a high performance in dynamic response and stability. Another is power board, to realize the inverter function and supply electronic power. Due to the suitable dead time of PWM inverter, the outputs variable frequency voltage of the drive is more suitable for controlling of servo motor. For the purpose of small volume, the main control part and power board were integrated. The results of time and frequency domain analyzing show that the servo drive is performance enhancement of high bandwidth control and fast response. The application of the servo drive system on a 3-axises robot is described. As highly integrated of this servo drive system, it provides an economical solution in servo motor control for robot and flexible manufacture and can be sustained without significant design effort.