Everyone knows that the structure of the robot is very complicated, and the servo drive is one of the important parts of the robot, which seriously affects the speed and accuracy of the robot. When choosing a driver, the robot staff must understand the basic common sense in advance and master the basic types of robot drivers in order to make the correct choice and learn about the specific information together.
What types of robot drivers are there:
DC Servo Motor Driver
DC servo motor drives mostly use pulse width modulation (PWM) servo drives, which change the average voltage applied to both ends of the motor armature by changing the pulse width, thereby changing the motor speed. PWM servo drive has the characteristics of wide speed range, good low-speed characteristics, fast response, high efficiency, strong overload capacity, etc. It is often used as a DC servo motor drive in industrial robots.
Synchronous AC Servo Motor Driver
Compared with the DC servo motor drive system, the synchronous AC servo motor drive has the advantages of high torque-to-inertia ratio, brushless and commutation spark, etc., and is widely used in industrial robots.
Synchronous AC servo motor drives usually use current-type pulse width modulation (PWM) phase inverters and multiple closed-loop control systems with current loops as inner loops and speed loops as outer loops to realize the control of three-phase permanent magnet synchronous servo motors. Current control. According to its working principle, drive current waveform and control mode, it can be divided into two kinds of servo systems:
Permanent magnet AC servo system driven by rectangular wave current.
Permanent magnet AC servo system driven by sine wave current.
The above is the type of robot driver. The robot has strict requirements on the use of the driver. Therefore, the problem must be considered in the selection. Only by selecting the appropriate driver, the robot can perform better. If it is because of choosing inappropriate components , Causing the robot to malfunction in production, then the gain is not worth the loss.