Tips: How does a servo drive work?The servo driver adopts digital signal processor (DSP) as the control core, an realize the complex control algorithm, digitization, networking and intelligentialization. The power device generally adopts intelligent power module (IPM) as the driving circuit of the core design. IPM integrated drive circuit with over-voltage and over-current, overheating, undervoltage fault detection and protection circuit. The soft start circuit is also added in the major loop, so as to reduce the impact on thedrive in the start-up process.First, the power drive unit is rectified by the three-phase full bridge rectifier circuit to input the three-phase electric or municipal power, and the corresponding DC power is obtained. The three-phase power or electric supply after rectifying can drive the AC servo motor through three-phase sine PWM voltage source inverter frequency conversion. The whole process of the power drive unit can be simply described as the process of AC-DC-AC. The main topology of the rectifier unit (AC-DC) is the three-phase full bridge uncontrolled rectifier circuit.
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