Every piece of equipment has its limits. If these limits are exceeded, the equipment will either be damaged or it will need to be shut down immediately, both of which pose certain risks. So, how long can the servo motors we use be overloaded? Below, we will provide the answer.
Currently, servo motors worldwide can withstand 30 minutes of overload. However, if the design incorporates double overload capability, prolonged double overload can damage the motor's characteristics, potentially rendering it unable to withstand double overload in the future. Therefore, overload operation is possible, but prolonged use is not recommended. The performance of servo motors also depends on the manufacturer. Some manufacturers have large design capacities that can guarantee 30 minutes of overload, while others have smaller design capacities and may not be able to guarantee such a high overload capacity.
Compared to servo motors, servo motors generally lack overload capacity, but they possess speed and torque overload capabilities. Their maximum torque is two to three times the rated current torque, which can be used to handle the torque formula of inertial torque loads at the moment of startup. Because servo motors lack this overload capacity, it's difficult to handle this torque formula when selecting models, generally requiring the selection of motors with very high torque. However, the equipment doesn't require such a high torque in the later stages of normal operation, resulting in torque loss.
If your motor is of good quality and operating within acceptable limits and the overload conditions are not severe, it is unlikely to suffer any damage. The lifespan of an electric motor largely depends on its roller bearings, which are among the shortest-lived components in an electric motor. Install it with high precision and ensure good parallelism, and you can use it with peace of mind. If it does burn out, it's the control board's fault for not connecting it to temperature control maintenance.
In actual operation under load, in addition to the applied torque Tload and friction Kn, the starting torque of a servo motor will continue to increase due to the load inertial torque J and angular acceleration dω/dt. Especially as the motor accelerates faster and faster, the larger dω/dt becomes, while J remains constant, the larger Te becomes, and the stronger the servo motor's torque overload capacity will be.
The above is a summary of "Servo Motor Overload Time" shared by the editor, hoping it will be helpful to you. Although there is enough time for everyone to use, you should still pay attention to operation, as it is not good for the equipment to operate under load for a long time.
