The servo system is mainly composed of a servo controller, a drive circuit, a servo motor and the corresponding reaction testing equipment.
(1) Servo motor
Servo motor refers to the motor that controls the mechanical components in the servo system, and the servo motor has an encoder inside, which can respond to the motion data to the servo drive in real time. The servo motor can make the control speed, azimuth accuracy very precise, and can convert the voltage signal into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal, and can respond quickly, and in the automatic control system, it is used as a fulfillment element, which can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft.
(2) Servo drive
Servo drive is a kind of controller used to control servo motor, and its effect is similar to the effect of frequency converter to ordinary communication motor, belongs to a part of servo system, and its primary effect is to amplify, change and regulate the power according to the requirements of the control instruction and then transmit to the servo motor.
(3) Sensing equipment
The most commonly used sensing equipment is the encoder, which generally has its own encoder in the servo motor, which is used to reflect the actual motion data collected to the driver, and then complete the motion control closed loop.
(4) The servo drive controls the servo motor
The servo drive generally controls the servo motor through three ways: azimuth, speed and torque to complete the high-precision positioning of the transmission system.
(1) azimuth control: the azimuth control form is generally through the frequency of the external input pulse to determine the size of the rolling speed, through the number of pulses to determine the angle of rolling, there are also some servos can directly assign speed and displacement, and the azimuth form can have very strict control of speed and azimuth.
(2) speed form: the speed form is controlled by the input of analog quantity or the input of pulse frequency for rolling speed, and the speed form can also be positioned when there is the outer ring PID control of the upper control equipment, but the azimuth signal of the motor or the azimuth signal of the load must be used for the reaction of the upper computer.
(3) torque control: the torque control mode is to set the size of the output torque of the motor shaft outside the motor shaft through the input of external analog quantity or the assignment of the direct address, and the setting torque size can be changed by the setting of the analog quantity in real time.
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Myth: The capacity selection of the inverter is based on the rated power of the motor
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