The word "servo" derives from the Greek word "slave." "Servo motor" can be understood as a motor that absolutely obeys the command signal: the rotor is stationary before the control signal is issued; the rotor rotates immediately when the control signal is issued; the rotor can stop immediately when the control signal disappears.
The servo motor is a micro motor used as an actuator in an automatic control device. Its function is to convert an electric signal into angular displacement or angular velocity of a rotary shaft.
working principle
1. A servo mechanism is an automatic control system that makes an object's position, orientation, status, and other output controlled variables follow any changes in the input target (or setpoint). The servo mainly depends on the pulse to position, basically can understand like this, the servo motor receives 1 pulse, will rotate the angle corresponding to 1 pulse, thus realize displacement.
Because the servo motor itself has a pulsed function, the servo motor will send a corresponding number of pulses for each rotation of the servo motor. Thus, the servo motor responds to the pulse received by the servo motor, or is called a closed loop. In this way, the system will know How many pulses are sent to the servo motor and how many pulses are received back at the same time, so that the rotation of the motor can be controlled very accurately so as to realize accurate positioning and can reach 0.001 mm.
DC and AC servo motors
1, DC servo motor is divided into brush and brushless motor.
The brush motor has low cost, simple structure, large starting torque, wide speed range, easy control and maintenance, but it is inconvenient to maintain (for carbon brushes), generates electromagnetic interference, and has environmental requirements. It can therefore be used in cost-sensitive general industrial and civil applications.
The brushless motor is small in size, light in weight, large in output, fast in response, high in speed, small in inertia, smooth in rotation, and stable in torque. The control is complex and it is easy to realize intelligence. The electronic commutation mode is flexible, and it can be changed by square wave or sine wave. The motor is maintenance-free, high efficiency, low operating temperature, low electromagnetic radiation, long life, and can be used in various environments.
2. AC servo motors are also brushless motors, which are divided into synchronous and asynchronous motors. Synchronous motors are generally used in current motion control. Its power range is large and can achieve large power. With high inertia, the maximum rotational speed is low, and it rapidly decreases with increasing power. Therefore, it is suitable for low speed and smooth operation.
3. The rotor inside the servo motor is a permanent magnet. The U/V/W three-phase power controlled by the driver forms an electromagnetic field. The rotor rotates under the action of this magnetic field. At the same time, the motor comes with an encoder feedback signal to the driver. The driver is based on the feedback value. Compare with the target value and adjust the rotation angle of the rotor. The accuracy of the servo motor is determined by the encoder accuracy (number of lines).
The difference in function between AC servo motor and brushless DC servo motor:
AC servo is better because it is sine wave control and torque ripple is small. DC servo is a trapezoidal wave. However, the DC servo is relatively simple and inexpensive.
Permanent magnet AC servo motor
The main advantages of permanent magnet AC servo motor compared with DC servo motor are:
(1) No brush and commutator, so the work is reliable and the requirements for maintenance and maintenance are low.
(2) The stator winding heat dissipation is more convenient.
(3) Small inertia, easy to improve the rapidity of the system.
(4) Adapt to high speed and high torque working conditions.
(5) Smaller volume and weight at the same power.
Circular Automation Connectors
Antenk `s M-Series connector range is the ideal connectivity solution for industrial automation technologies that require fast, secure and reliable connections with a high degree of environmental protection. Our automation interconnect range includes field-attachable circular connectors with industry standard M5, M8, M12, M16 & M23 threads in addition to panel mount receptacles, overmolded cable variants and power/signal distribution units.
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M8 circular connectors
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M8 connectors Key Features
Straight and right-angled configurations
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A and B coded
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Field installable, panel mount and overmolded connectors
PVC or PUR jacketed cable variants with lengths 1m – 15m
3, 4 or 5 contacts
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M12 connectors are established as one of the most reliable and efficient connection standards for Industrial Machinery and Factory Automation applications. With a small footprint, extremely low failure rate and high performance capabilities, this range is ideal not only for sensor connections but also for various fieldbus systems.
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M12 Circular connectors Key Features
Industry standard screw locking mechanism
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A, B, D and X Coded versions
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Overmolded PVC or PUR cable connectors
M16 Connectors
With a rugged metal housing and environmental protection rating of IP67 when mated, this robust M16 DIN connector range is an ideal solution for ensuring that power and signal connections are not compromised in harsh environments and industrial applications.
M16 Circular Connectors Key Features
Screw locking compliant with DIN EN 61076-2-106
IP67 degree of protection
Robust metal connector shells
A-Coded field installable and panel mount variants
Pole variants from 3 – 12
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M23 Connectors
Typically used for providing high performance, reliable and robust connections in commercial and industrial automation applications, these IP67 rated signal and power connectors offer a high degree of protection against environmental factors such as water, dirt and moisture.
Antenk`s range of M23 Connectors includes field installable male and female connectors and front panel mount options from 12-pole to 19-pole in straight and right angle versions.
M23 Circular Connectors Key Features
A-Coded
Straight and angled configurations
Male and female variants, 12 or 19 pin
Robust metal housing
IP67 protection rating (when mated)
Voltages up to 200 V and currents up to 8 A
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