A servo motor, also known as a servo motor, is a type of motor that controls electromechanical components in a servo system. It is one of the simplest speed-changing electronic devices used in auxiliary motors. A servo motor converts voltage signals into torque and torque to drive the controlled object. The rotor speed of a servo motor is controlled by the input signal and has a fast response characteristic. It is commonly used in actuators in automatic control systems. A key feature of servo motors is that they do not rotate when the signal voltage is zero; their speed decreases uniformly as the torque increases.
Servo motors convert received electrical signals into angular displacement or angular velocity output on the motor shaft. Servo motors are divided into two main categories: DC servo motors and AC servo motors.
Servo motor working principle:
When the servo motor receives one pulse, it will rotate by the angle corresponding to that pulse, thereby achieving displacement. When the servo motor rotates by one angle, it will send out a corresponding number of pulses, forming a closed loop with the pulses received by the servo motor. The automatic control system will know how many pulses have been sent to the servo motor and how many pulses have been received and sent back to the automatic control system. The automatic control system can then precisely control the rotation of the motor, thereby achieving precise positioning.
DC servo motors are divided into brushed and brushless motors. Brushed motors are low in cost, simple in structure, and have high starting torque, but they are prone to electromagnetic interference. Brushless motors are small in size, fast in response, and have stable torque, but their control methods are complex.
AC servo motors are divided into synchronous and asynchronous motors. Synchronous motors are usually used in motion control because they have a wide power range and are suitable for low-speed, stable operation applications.
The accuracy of a servo motor depends on the accuracy (number of lines) of the encoder.
The debugging method for servo motors is as follows:
1. Initialize parameters
2. Wiring
3. Try the direction
4. Suppress zero drift
5. Establish closed-loop control
6. Adjust closed-loop parameters
Advantages of using servo motors:
1. Precision: Achieve closed-loop control of position, velocity, and torque.
2. Speed: Good performance at high speeds
3. Adaptability: Strong overload resistance
4. Stability: Smooth operation at low speeds, suitable for applications requiring high-speed response.
5. Timeliness: The dynamic response time of motor acceleration and deceleration is short.
6. Comfort: Heat generation and noise are significantly reduced.
The above is basic information about servo motors, which we hope will be helpful to users.
