Explanation of working principle of servo motor driver

by:V&T Technologies     2020-01-30
Explain the working principle of servo motor driver what is the working principle of servo motor driver? Here, Shen Li motor Xiaobian will give you some information about the servo motor driver. If you are interested, let's take a look. At present, the mainstream servo motor drivers all adopt digital signal processors (DSP) As the control core, it can realize more complex control algorithms and realize digitalization, networking and intelligence. Power devices are commonly used with intelligent power modules (IPM) The driving circuit is designed as the core. IPM integrates the driving circuit inside and has fault detection and protection circuits such as overvoltage, overcurrent, overheating, undervoltage, etc. A soft start circuit is also added to the main circuit, to reduce the impact of the startup process on the drive. The power drive unit first rectifies the input three-phase power or commercial power through a three-phase full-bridge rectifier circuit to obtain the corresponding direct current. After rectified three-phase power or commercial power, the three-phase permanent magnet synchronous AC servo motor is driven by frequency conversion of the three-phase sinusoidal PWM voltage inverter. The whole process of the Power Drive unit can be simply said to be AC-DC-AC process. Rectifier unit (AC-DC) The main topology circuit is a three-phase full bridge uncontrolled rectifier circuit. With the large-scale application of servo system, the use of servo motor driver, debugging of servo motor driver and maintenance of servo motor driver are all important technical topics of servo driver today, more and more industrial control technology service providers have conducted in-depth technical research on servo motor drivers. Servo motor driver is an important part of modern motion control and is widely used in industrial robots, numerical control machining centers and other automation equipment. Especially the servo driver applied to control ac permanent magnet synchronous motor has become a research hotspot at home and abroad. At present, the closed-loop control algorithm of current, speed and position based on vector control is widely used in AC servo driver design. Whether the speed closed-loop design in this algorithm is reasonable or not plays a key role in the whole servo control system, especially the performance of speed control. Related reading: The Development of servo motor to automatic dispensing machine in mobile phone industry, the difference between servo motor and frequency converter TAG servo motor driver
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