What is the communication servo motor driver and how it works
Permanent magnet ac servo motor Since the 1980 s, with the integrated circuit, power electronic technology and the development of ac variable speed drive technology, permanent magnet ac servo drive technology has the prominent development, all countries well-known electrical manufacturers have launched their own ac servo motor and servo drive series products and constantly improve and update. The ac servo system has become the main development direction of the modern high performance servo system, so that the original dc servo system faces the crisis of elimination. Since the 1990s, the world's commoditized ac servo system has been powered by a full-digital sine wave motor. The ac servo actuator is developing rapidly in the field of transmission. Comparing with dc servo motor, the main advantages are: There is no brush and commutator, so the work is reliable and requires low maintenance and maintenance. It is convenient to heat the heat of the stator winding. The inertia is small and easy to improve the speed of the system. It is adapted to the high speed torque. There is a smaller volume and weight under the same power.
The working principle of ac servo motor The inside of the servo motor rotor is a permanent magnets, three-phase electric drive control of U/V/W form the electromagnetic field, under the action of rotating rotor in this field, at the same time, motor with encoder feedback signal to drive, drive according to the feedback value compared with the target, adjust the Angle of the rotor rotation. The accuracy of the servo motor is determined by the accuracy of the encoder (line count).
Motor servo motor is also called the implementation, in the automatic control system, is used as actuators, converts the received electrical signal into angular displacement or velocity of motor shaft output. Divided into two major categories of dc and ac servo motor, its main characteristic is, when the signal voltage is zero no rotation, speed decreases with the increase of torque and uniform,
Ac servo is better, because it is the sine wave control, the torque ripple is small. Dc servo is a trapezoidal wave. But dc servo is simpler and cheaper.
