Technical Discussion: AC servo drive can replace the inverter

At present, in industrial applications, speed control and torque control occasions less demanding general-purpose inverter , in the strict position control requirements of the occasion with intelligent AC servo drive to achieve, there is the servo response speed Much higher than the frequency, some of the high accuracy of the speed and response requirements are also useful occasions AC servo drive control, that is, frequency control can be used in almost all situations can be replaced with AC servo drive.

AC servo drive and inverter can be said to be a pair of brothers, are AC motor drive, in accordance with the order of availability, the inverter should be called the brother, AC servo drive is called the younger brother. Inverter drive frequency motor, but also drive ordinary AC motor, the main function is to adjust the motor speed. AC servo drive AC servo motor, its main feature is accurate and rapid positioning and tracking, precise position control.

As one of the supporting technologies of modern industrial automation and motion control, AC servo drive is widely used in machine tools , printing equipment, packaging equipment, textile equipment, rubber and plastics due to its high-speed control accuracy, wide speed range, high dynamic characteristics and high efficiency Equipment, electronic semiconductor, wind power / solar energy and other new energy sources such as robots, automated production lines and other fields.

However, the development of AC servo drive inverter technology, AC servo drive reference and application of the frequency conversion technology, based on the DC servo motor control through the inverter PWM mode to imitate the DC motor control to achieve, that is, AC servo motor Must have a frequency of this link. Like inverter, AC power is commutated to DC power and then inverted into frequency-adjustable AC power through various types of transistors (IGBT, IGCT, etc.) that can control the gate. The waveform is similar to positive Cosine pulsating electricity.

Does the AC servo drive replace the frequency inverter? , Ultimately can replace the two key factors, one is the price, one is power. If one day in the future servo brother "deign" in the price, the frequency brother is not more "lonely"? If the frequency of brother breakthrough in technological innovation, there will be no longer brother brother points, and become a real A family? The development of science and technology is as flashy as it is always beyond our limits, and we are looking forward to a future of rapid technological progress.

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