Partial setting method of important parameters of servo drive

Partial setting method of important parameters of servo drive

Synchronous servo drive is a miniature motor used as an actuator in an automatic control device. Its function is to convert electrical signals into the angular displacement or angular velocity of the rotating shaft. In automation equipment, servo drives are usually used, especially for position control. All brands of servo drives have position control functions.

The controller sends pulses to control the operation of the servo drive motor, the number of pulses corresponds to the rotation angle, and the pulse frequency corresponds to the speed. When the new system cannot work with parameters, please set the position gain first to ensure that the servo drive motor is noise-free. Set it as large as possible. The moment of inertia ratio is also important. You can set the speed gain by referring to the fixed number through self-learning. And speed integration time to ensure continuous operation at low speed and control the position accuracy.

Synchronous servo drive

 1. Position proportional gain

 Set the proportional gain of the position loop regulator. The larger the set value, the higher the gain and the greater the stiffness. Under the same frequency command pulse condition, the position lag will become smaller, but too large a value may cause oscillation or overshoot. , The parameter value is determined by the specific servo drive system model and load conditions.

 2. Position feedforward gain

 Set the feedforward gain of the position loop. The larger the setting value, the smaller the position lag under any frequency command pulse. The larger the feedforward gain of the position loop, the higher the high-speed response characteristic of the control system, but the position of the system is unstable. , And may oscillate. When high response characteristics are not required, this parameter is usually set to 0 to indicate the range: 0~100%

 3. Speed proportional gain

 Set the proportional gain of the Synchronous servo drive speed regulator. The larger the set value, the higher the gain and the greater the stiffness. This parameter value is determined according to the specific servo drive model and load value. Generally, the greater the load inertia, the greater the The larger the value, when the system does not oscillate, try to set a larger value.

 4. Speed integral time constant

 Set the integral time constant of the speed regulator. The smaller the set value, the faster the integral speed. The parameter value is determined according to the specific servo drive model and load conditions. Generally, the larger the load inertia, the larger the set value. When the system does not oscillate, try to set a smaller value.

 5. Speed feedback filter coefficient

 Set the characteristics of the speed feedback low-pass filter. The larger the value, the lower the cut-off frequency and the smaller the noise generated by the motor. If the load inertia is large, the set value can be appropriately reduced. If the value is too large, it will slow down the response speed and possibly cause oscillation. The smaller the value, the higher the cut-off frequency and the faster the speed feedback response. If a higher speed response is required, the setting value can be appropriately reduced.

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