Overload is a practical problem that may occur during the application of motor products. We have shared many tweets on the topic of overload with you, but the focus of the shared content may not be exactly the same.

During a discussion on overload, I accidentally got a piece of information about "Why does the motor overload?" Today, we will give you a basic summary of this topic:

Whether the motor is overloaded is relative to the motor's load capacity. When the load driven by the motor is greater than the actual load capacity of the motor, it is overloaded. Therefore, motor users should select and match the motor according to the actual driving requirements.

When the actual power of the motor is less than the nominal power, even if the motor user configures the load according to the nominal power, the motor will appear to be overloaded, and eventually the winding will burn out because it cannot meet the load being dragged. This problem is common in the handling of some specific quality issues. Motor users cannot directly measure the motor power, but can compare it through comparison methods. Under the same load, some motors can work normally, while others have insufficient capacity. Therefore, motor manufacturers should produce motors according to specifications.

In the application of motors, in addition to the matching relationship between the dragged load and the motor's carrying capacity, the failure of the motor itself may also cause the motor to appear to be overloaded. The main problem is concentrated on the mechanical system factors of the motor, such as abnormal stagnation or disintegration of the bearing system, which causes the motor rotor part to not operate normally, which is manifested in the motor speed not reaching the rated speed or even stopping, and the motor has a "humming" running performance, and the current will increase significantly. If the motor has no protection device, it may cause serious failure of the motor in the end.

For impact loads with uneven loads, short-term light overloads may not cause serious problems to the motor, but severe overloads may lead to serious consequences such as motor stalling, mechanical and electrical overloads, and quality threats to the winding and rotor systems, resulting in winding overheating and burning, bearing failure, and even shaft breakage.