What is the reason for the high no load current of servo motor? What causes high noise?

The servo motor shaft does not have a connecting screw or reducer gear (separate servo motor), and when the no-load current is large, it is a problem of improper parameter setting or the motor itself.

The servo motor shaft has been connected to the lead screw or reducer gear, and the large no-load current is generally due to the fact that the mechanical load has not been adjusted well, and the motor shaft is not concentric with the lead screw or reducer gear, and the mechanical strength is suffocated.

Servo motor refers to the engine that controls the operation of mechanical components in the servo system, and is a kind of auxiliary motor indirect transmission device. The speed and position accuracy can be controlled very accurately, and the voltage signal can be converted into torque and speed to drive the control object. The rotor speed is controlled by the input signal, and can respond quickly, and is used as an actuator in the automatic control system, and has a small electromechanical time constant and high linearity.

Electromagnetic interference is generated, and there are requirements for the environment.

Therefore, it can be used in cost-sensitive general industrial and civil applications. The servo system is an automatic control system that enables the output controlled quantities such as the position, orientation, and status of the object to follow the arbitrary change of the input target (or given value).

1. First of all, the cause of the mechanical parts is excluded;

2. Whether the parameter setting of the servo controller is improper;

3. The servo motor itself is a problem;

4. There are many reasons for high noise, such as ball screw installation is not in place, vibration, holding strength, motor noise, etc., which should be analyzed according to the characteristics of the sound.

The noise is loud, most of which is caused by improper gain and load coordination, (please rule out in advance that the assembly of the motor itself is no problem, this possibility is very low) The newly bought motor must not have been adjusted, so do the following two steps.

Step 1: Mechanically confirm whether the connection is OK. The steel belt timing belt enables tension management, which is fixed on a tension (the tension is different, the characteristics of the machine return to the machine are different, and the gain is completely different), and whether the concentricity is OK.

Step 2: After the mechanical OK, the gain parameters are adjusted, and the actual speed and actual torque of the motor are observed through the servo monitoring software, and then the speed loop proportional gain and speed loop integral constant are adjusted. The noise is high, most likely because these two curves have more glitches, which should be solved by reducing the proportional gain of the speed loop.

Slowly descend while observing.

If the servo has an auto-tuning function, start the auto-tuning (your phenomenon should be able to complete the auto-tuning), and then run back and forth a few times, the parameters should be automatically calculated by the leakage beam, and the better curve is seen, the auto-tuning is canceled, and the good parameters are saved.

Summary. Hello dear <>

The servo motor can be adjusted to the no-load accuracy and the load is not accurate: the servo motor control system can be adjusted, such as adjusting the control algorithm parameters, increasing the feedback control, increasing the sampling frequency of the controller, and so on. All of these methods can improve the accuracy of the servo motor.

In addition, the design of the optimized load can be considered to reduce the impact of the load on the servo motor, so as to improve the accuracy. At the same time, it is also necessary to pay attention to the normal maintenance and maintenance of the servo motor to ensure the stability and reliability of the equipment.

The servo motor is accurate with no load and inaccurate with load.

Hello dear <>

The servo motor can be adjusted to the no-load accuracy and the load is inaccurate: the servo motor control system can be adjusted, such as adjusting the control algorithm parameters, increasing the feedback control, increasing the sampling frequency of the controller, and so on. All of these methods can improve the accuracy of the servo motor.

In addition, the design of the optimized load can be considered to reduce the impact of the load on the servo motor to improve the accuracy. At the same time, it is also necessary to pay attention to the normal maintenance and maintenance of the servo motor to ensure the stability and reliability of the equipment.

1.Generally, the grinding book gain is set to be too big, and we can adjust the gain manually or automatically adjust the gain. 2.

The load is too heavy and it is necessary to re-select the motor with a larger capacity or to lighten the load. To avoid overload operation, it is recommended to install a reducer to increase the load capacity. Two:

The position control of the servo motor is not accurate (1) to confirm whether the current value of the pulse actually emitted by the controller is consistent with what we need to set. (2) Monitor whether the number of pulse instructions received by the servo drive is consistent with that issued by the controller, and check the control line cable if it is inconsistent. 3.

Generally, the gain setting is too large, and we can adjust the gain manually or automatically adjust the gain by vertically. 4.Servo motors accumulate errors during operation, and it is recommended to carry out origin search operations when the error exceeds the allowable range.

Have a great day, dear ones. I hope mine helps you

On the surface, it is indeed the reason for the servo motor, but after we carefully analyze the working principle of the servo motor, we will find that this conclusion is completely wrong.

To give a simple example, there is a machine that uses a servo motor to drive a load with constant speed and large inertia through a V-belt. The whole system needs to obtain constant speed and fast response characteristics, and analyze its action process

When the drive sends current to the motor, the motor immediately generates torque; In the beginning, because the V-belt will be elastic, the load will not accelerate as fast as the motor; The servo motor will reach the set speed earlier than the load, and the offset on the motor will weaken the current and thus the torque; As the V-belt tension increases, the motor slows down, and the drive increases the current, and so on.

In this example, the system is oscillating, the motor torque is fluctuating, and the load speed is fluctuating. The result, of course, is noise, wear, and instability. However, this is not caused by the servo motor, this noise and instability, is the first in the mechanical transmission device, is caused by the servo system response speed (high) and mechanical transmission or reaction time (long) does not match, that is, the servo motor response is faster than the time required by the system to adjust the new torque.

Of course, the above is only one of the reasons for noise and instability, for different reasons, there will be different solutions, such as noise caused by mechanical resonance, resonance suppression can be taken in the servo, low-pass filtering and other methods, in short, the cause of noise and instability will basically not be caused by the servo motor itself.

There are several reasons for the excessive no-load current of the asynchronous motor:

1) The power supply voltage is too high: when the power supply voltage is too high, the motor core will produce magnetic saturation, resulting in excessive no-load current.

2) The motor is improperly assembled or the gap is too large after repair.

3) The number of turns of the stator winding is not enough or the Ya wiring is mistakenly connected into a triangle wiring.

4) For some old motors. Due to the corrosion or aging of the silicon steel sheet, the magnetic field strength is weakened or the insulation between the pieces is damaged, resulting in too much no-load current. For small motors, the no-load current can continue to be used as long as it does not exceed 50% of the rated current.

The power supply voltage is too high: when the power supply voltage is too high, the motor core will produce magnetic saturation phenomenon, resulting in excessive no-load current. The motor is improperly assembled or the gap is too large after repair.

The number of turns of the stator winding is not enough or the type connection is misconnected to the forming wiring. For some old motors, due to the corrosion or aging of silicon steel sheets, the magnetic field strength is weakened or the insulation between the pieces is damaged, resulting in too much no-load current. For small motors, the no-load current can continue to be used as long as it does not slope above 50% of the rated current.