Servo motor servo motor encoder

Servo motor refers to the engine that controls the work of mechanical components in the servo system. The rotor speed of the servo motor is controlled by the input signal, the response is fast. In the automatic control system, as an actuator, it has the characteristics of small electromechanical time constant, high linearity, high starting voltage. The received electrical signal is converted into angular displacement angular velocity output to the motor shaft. Divided into two categories: DC servo motors AC servo motors. Servo system (servo mechanism) is an automatic control system that changes the output control amount of the object's position, direction, state, etc. with any change in the input target ( given value). Servo mainly relies on pulses for positioning. Basically, it can be understood that when the servo motor receives 1 pulse, it will rotate the angle corresponding to 1 pulse to achieve displacement. Because the servo motor itself has the function of sending pulses, every time the servo motor rotates one angle, it will send out a corresponding number of pulses. In this way, it echoes the pulse received by the servo motor, it is called a closed loop. In this way, the system knows how many pulses are sent to the servo motor how many pulses are received at the same time, so that the rotation of the motor can be controlled to achieve positioning up to 0.001mm.

Brushed motors have low cost, simple structure, large starting torque, wide speed range, easy to control, need maintenance, but maintenance (replacement of carbon brushes) is inconvenient, generates electromagnetic interference, has requirements for the environment. Therefore, it can be used in general industrial civil applications that are cost-sensitive.

The brushless motor is small in size, light in weight, large in output, fast in response, fast in speed, low inertia, stable in rotation stable in torque. The control is complex, easy to realize intelligence, its electronic commutation method is flexible, which can be square wave sine wave. The motor is maintenance-free, high efficiency, low operating temperature, low electromagnetic radiation, long life, can be used in various environments.

2 AC servo motors are also brushless motors, divided into synchronous motors asynchronous motors. Currently, motion control generally uses synchronous motors. It has a large power range can reach a large power. The inertia is large, the speed is low, it decreases with power changes. Therefore, it is suitable for applications that run smoothly at low speeds.

three. The rotor inside the servo motor is a permanent magnet, the U/V/W three-phase electric energy controlled by the driver forms an electromagnetic field. The rotor rotates under the action of this magnetic field. At the same time, the motor encoder feeds back the signal to the drive according to the feedback value. Compared with the target value, adjust the rotor rotation angle. The accuracy of the servo motor is determined by the accuracy of the encoder (number of rows). The functional difference between the AC brushless servo motor the DC servo motor:

The AC servo system adopts sine wave control, with small torque ripple good performance. The DC servo is a trapezoidal wave. But DC servo is simpler cheaper.

DEUPREE (Qingdao) Industrial Technology Co., Ltd. is an integrated enterprise focusing on the research development of automated industrial technology equipment manufacturing. The company’s products mainly include rotary motion sensors, linear displacement sensors, object recognition sensors, laser rangefinders, process control measurement Class instruments, signal detection systems, signal transmission systems, immature drive systems, UPS safety power supply systems, automation equipment energy-saving cleaning auxiliary equipment systems are limited to this, we can also customize flexibly customize according to customer needs to meet different Different needs of customers.