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The working principle of servo drive | custom made drive
  • 08 Oct, 2021
  • Posts by : Raiseway
The working principle of servo drive | custom made drive

The working principle of servo drive

The mainstream servo drives all use a digital signal processor (DSP) as the control core, which can realize more complex control algorithms, and realize digitization, networking and intelligence. Power devices generally use a drive circuit designed with an intelligent power module (IPM) as the core. The drive circuit is integrated inside the IPM, and it has fault detection and protection circuits such as overvoltage, overcurrent, overheating, and undervoltage. Start-up circuit to reduce the impact on the drive during the start-up process. The power drive unit first rectifies the input three-phase power or mains power through the three-phase full-bridge rectifier circuit to obtain the corresponding direct current. After the rectified three-phase power or city power, the three-phase sinusoidal PWM voltage inverter is used to drive the three-phase permanent magnet synchronous AC servo motor. The entire process of the power drive unit can be simply said to be an AC-DC-AC process. The main topology circuit of the rectifier unit (AC-DC) is a three-phase full-bridge uncontrolled rectifier circuit.
With the large-scale application of servo systems, the use of servo drives, servo drive debugging, and servo drive maintenance are all important technical topics for servo drives today. More and more industrial control technology service providers have conducted in-depth technical research on servo drives.

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