The working principle of ac servo motor
The rotor inside the servo motor is a permanent magnet. The driver controls the U/V/W three-phase electricity to form an electromagnetic field. The rotor rotates under the action of this magnetic field. The precision of servo motor depends on the precision of encoder (number of lines).
What is a servo motor? How many types are there? What are the characteristics of the job?
Answer: servo motor is also called the executive motor. In the automatic control system, it is used as the executive component to convert the received electrical signal into the angular displacement or angular velocity output on the motor shaft. 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,
college ac servo motor and brushless dc servo motor, please what is the difference between on the function?A: ac servo is better because it is controlled by sine wave and torque ripple is small. Dc servo is trapezoidal wave. But dc servo is simpler and cheaper. College permanent magnet ac servo motor
Since the 1980s, with the development of integrated circuit, power electronics technology and ac variable speed drive technology, permanent magnet ac servo drive technology has had a prominent development, the famous electrical manufacturers have launched their own ac servo motor and servo driver series products and constantly improve and update. Ac servo system has become the main development direction of contemporary high performance servo system, and the original dc servo system is facing the crisis of elimination. After the 1990s, the ac servo system which has been commercialized all over the world is driven by sinusoidal motor servo with full digital control. The development of ac servo drive device in the field of transmission is changing with each passing day. Compared to dc servo motor, permanent magnet ac servo motor main advantages are: college (1) no brush and commutator, so that the work is reliable, the maintenance and low maintenance requirements. College 2 stator winding heat dissipation is more convenient. College (3) inertia small, easy to improve the rapidity of the system. College (4) adapted to high speed large torque working condition. College 5] with power under a relatively small volume and weight.