How the Servo Driver Works

　　Servo drive is used to control the servo motor of a controller, its role is similar to the role of the inverter in the ordinary AC motor, part of the servo system.

　　At present, the mainstream servo drives adopt the digital signal processor (DSP) as the control core, can realize the complicated control algorithm, realize the digitization, the network and the intelligence. Power devices commonly used to intelligent power module (IPM) as the core design of the drive circuit, IPM internal integrated drive circuit, at the same time with over-voltage, over current, overheating, undervoltage fault detection and protection circuit, the main circuit is also added soft Start the circuit to reduce the impact of the boot process on the drive.

　　Power drive unit first through the three-phase full-bridge rectifier circuit input of the three-phase power or electricity to rectify, get the corresponding DC. After a good three-phase rectifier power or electricity, and then through the three-phase sinusoidal PWM voltage inverter inverter to drive three-phase permanent magnet synchronous AC servo motor. The whole process of the power drive unit can be simply the AC-DC-AC process. Rectifier unit (AC-DC) The main topology circuit is a three-phase full bridge uncontrolled rectifier circuit.

　　Servo drive can generally use the position, speed and torque three control methods, mainly used in high-precision positioning system, is currently the high-end transmission technology. With the large-scale application of servo system, servo drive use, servo drive commissioning, servo drive maintenance are servo drives in today's more important technical issues, more and more industrial technology service providers on the servo drive technology in-depth study.