The motor is an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect transmission. It is also called an executive motor. It is used as an actuator in an automatic control system to convert the received electrical signal into an angular displacement or angular velocity output on the motor shaft. Servo motors are divided into DC and AC servo motors. Its main feature is: when the signal voltage is zero, there is no rotation phenomenon, Servo Motor and the rotation speed decreases with the increase of the torque; its function: it can control the speed and the position accuracy is very accurate.
AC servo motors are also brushless motors, which are divided into synchronous and asynchronous motors. At present, synchronous motors are generally used in motion control. It has a large power range and can achieve a large power. Large inertia, low maximum rotation speed, and rapidly decreases with increasing power. Therefore, it is suitable for applications that run smoothly at low speeds.
DC servo motors are divided into brushless and brushed motors. The brushless motor has a small volume, light weight, large output, fast response, high speed, small inertia,Servo Motor smooth rotation and stable torque. The control is complex, and it is easy to achieve intelligence. The electronic commutation method is flexible, and it can be square wave commutation or sine wave commutation. The motor is maintenance-free, with high efficiency, low operating temperature, low electromagnetic radiation, and long life. It can be used in various environments.
The brushed motor has low cost,Servo Motor simple structure, large starting torque, wide speed range, easy control, and needs maintenance, but it is convenient to maintain (change carbon brush), generates electromagnetic interference, and has environmental requirements. Therefore, it can be used for general industrial and civil occasions with higher cost.
The rotor inside the motor is a permanent magnet. The U / V / W three-phase electricity controlled by the driver forms an electromagnetic field. The rotor rotates under the action of this magnetic field. At the same time,Servo Motor the encoder feedback signal from the motor comes to the driver. The driver is based on the feedback value and the target value. Make a comparison and adjust the rotor rotation angle. The accuracy of the servo motor depends on the accuracy (number of lines) of the encoder.
