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Exactly what is a speed reducer1.The servo system (servo mechanism) is the location, range object,
State controlled quantity can follow the input output target (or reference) automatic control system of arbitrary change. Servo depends mainly on the impulse to locate, basically can understand so, servo motor receives 1 pulse, 1 pulse angle can rotate corresponding, so as to realize the displacement, because, the servo motor has a pulse function, so the servo motor rotates an angle, it sends out pulses, the corresponding quantity of it, accept and servo motor pulse forming the echo, or closed loop, thus, the system will know how many pulses to the servo motor, also received a number of pulse back, such, can control the rotation of the motor is very accurate, so as to achieve accurate positioning, can reach 0.001mm. Into a DC servo motor brush and brushless motor.
Brush motor low cost, simple structure, large starting torque, wide speed range, easy control, maintenance, and maintenance is not convenient (Huan Tanshua), electromagnetic interference, the environment requirements. So it can be used for cost sensitive general industrial and civil applications.
Brushless motor small size, light weight, high power, fast response, high speed, small inertia, smooth rotation, torque stability.
Control complex, easy to implement intelligent, the electronic commutation is flexible, can be square wave or sinusoidal commutation. Motor maintenance free, high efficiency, low operating temperature, electromagnetic radiation is very small, long life, can be used in various environments.
2.AC servo motor and brushless motor, divided into synchronous and asynchronous motor, motion control in general use synchronous motor, the scope of its power, can do a lot of power. Large inertia, the maximum rotation speed is low, and with the rapid increase of power reduction. Therefore suitable for low-speed applications running smoothly.
3.The internal rotor servo motor is a permanent magnet, drive control of the U/V/W three-phase power electromagnetic fields, the rotating rotor under the action of magnetic field, while the motor with encoder feedback signal to the drive, the drive according to the feedback value is compared to a target value, adjusting the angle of the rotation of the rotor. The accuracy of the servo motor depends on the precision of encoder (line number).
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